This is a method to preserve the freshness and natural appearance of your frozen food while increasing your profitability. All of
our IQF tunnel freezers and cookers are designed to minimize the cost per product, ensure a low energy consumption, and guarantee
the maximum yield. Together, these factors add up to ensure high product quality, energy efficiency, and food safety.
Tunnel freezing and heating is characterized by conveying food through a tunnel of circulating cold air to freeze it very fast and
homogeneously. It is rapid, efficient, and gentle – and it has a minimal effect on the cell structure. This results in improved
food quality and a high yield with only 0.2% drip loss depending on your product.
Our special design ensures easy cleaning, maintenance, and a long service life. We only use high quality stainless steel
components to meet even the strictest cleaning requirements and avoid corrosion.
Our IQF tunnel solutions are always based on your product characteristics, capacities, facility space, and line layout. And you
can count on our contribution to secure you a suitable solution that guarantees the homogeneous and precise thermal treatment of
your food.
Tunnel freezers and cookers are suited for deep freezing as well as crust freezing and thermal treatment of standard as well as
fragile food – but we also develop specialized niche products such as equipment to treat glazed food.
our IQF tunnel freezers and cookers are designed to minimize the cost per product, ensure a low energy consumption, and guarantee
the maximum yield. Together, these factors add up to ensure high product quality, energy efficiency, and food safety.
Tunnel freezing and heating is characterized by conveying food through a tunnel of circulating cold air to freeze it very fast and
homogeneously. It is rapid, efficient, and gentle – and it has a minimal effect on the cell structure. This results in improved
food quality and a high yield with only 0.2% drip loss depending on your product.
Our special design ensures easy cleaning, maintenance, and a long service life. We only use high quality stainless steel
components to meet even the strictest cleaning requirements and avoid corrosion.
Our IQF tunnel solutions are always based on your product characteristics, capacities, facility space, and line layout. And you
can count on our contribution to secure you a suitable solution that guarantees the homogeneous and precise thermal treatment of
your food.
Tunnel freezers and cookers are suited for deep freezing as well as crust freezing and thermal treatment of standard as well as
fragile food – but we also develop specialized niche products such as equipment to treat glazed food.
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Product Name
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Tunnel Freezer
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Insulated Enclosure
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PIR/PU, double sides stainless steel panel
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Control Panel
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PLC touch screen, SS panel
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Refrigerant
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Freon, Ammonia, COâ‚‚
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Evaporator
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Al/SS tube, aluminum fin, variable fin pitch
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Defrost
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Water/hot /ADF optional
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Freezing/Cooling Time
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Stepless variable frequency adjustable
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Freeze Time
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4-40mins
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A tunnel freezer is an industrial machine that rapidly freezes food products by moving them on a conveyor belt through a long, insulated tunnel with powerful, circulating cold air (or cryogenic gases like liquid nitrogen). This fast freezing preserves food quality, texture, and nutrients by preventing large ice crystals from forming, making it ideal for individually quick freezing (IQF) items like fruits, vegetables, meats, and baked goods, ensuring they remain separate and high-quality after freezing.
How it works
Conveyor System: Products are placed on a mesh belt or stacked multi-tier belts that carry them through the tunnel. Cold Air: High-velocity fans blow extremely cold air (often below -30°C) over the products. Cryogenics (Optional): Some systems use liquid nitrogen or CO2 for even faster freezing. IQF (Individual Quick Freezing): The rapid airflow freezes items individually, preventing them from clumping. Insulated Chamber: An insulated housing maintains the intense cold and prevents outside heat from entering.
Key features & benefits
High Quality: Rapid freezing minimizes cell damage, preserving texture, flavor, and yield.
Efficiency: Quickly freezes large volumes of product, integrating seamlessly into production lines. Versatility: Suitable for many products, from berries and fries to meat and seafood. Hygienic Design: Often made from stainless steel with easy-to-clean features to meet strict food safety standards.
Efficiency: Quickly freezes large volumes of product, integrating seamlessly into production lines. Versatility: Suitable for many products, from berries and fries to meat and seafood. Hygienic Design: Often made from stainless steel with easy-to-clean features to meet strict food safety standards.
Efficient Fans
High efficiency centrifugal fan, which meets the needs of large air volume and high air speed.
The fans structure is easy to clean and maintain.
The fully-sealed motor runs smoothly and last long.
The fans structure is easy to clean and maintain.
The fully-sealed motor runs smoothly and last long.
Efficient Evaporator
Our design was simulated with European professional heat exchanger software. All tubes are expanded hydraulically rather than
mechanically, which improves heat exchange performance due to more uniform expansion and a tighter fit between tube and fin.
Variable fin pitch is used to delay frost formation on the filn’s surface. Longer frosting interval. Easy access and cleaning.
mechanically, which improves heat exchange performance due to more uniform expansion and a tighter fit between tube and fin.
Variable fin pitch is used to delay frost formation on the filn’s surface. Longer frosting interval. Easy access and cleaning.
Air Defrosting System
Remove frost from the evaporator fin surface in time during operation of the freezer. Ensure long and continuous operation of the freezer, reduce evaporator frosting and improve productivity.
Intelligent Control System
PLC touch screen, friendly interface, easy operation. Real-time display of equipment running status, the temperature of each area, and fault alarm. Preset freezing programs tailored for different products. Optional remote troubleshooting module.
Square Technology Group Co. Ltd is a listed company in Shanghai-stock Exchange. The company has been manufacturing freezing systems for over 30 years and is the largest industrial freezer manufacturer in the China.
Our manufacturing facility is located in Nantong, China, with some 1300 employees and 64 hectares’ land. We serve a wide range of food processing industries and can draw from our extensive experience to provide our customers the best value and ensure maximum profitability.
The product line includes spiral freezer, plate freezer, tunnel IQF, refrigeration system, cold cooler, insulated panel, cooler,oven, ice machine, etc.
Our products have been exported to over 80 countries covering various applications, including seafood, protein, bakery, vegetable, fruits, etc. Square dedicate to deliver the superior quality freezing equipment to our client.
Our manufacturing facility is located in Nantong, China, with some 1300 employees and 64 hectares’ land. We serve a wide range of food processing industries and can draw from our extensive experience to provide our customers the best value and ensure maximum profitability.
The product line includes spiral freezer, plate freezer, tunnel IQF, refrigeration system, cold cooler, insulated panel, cooler,oven, ice machine, etc.
Our products have been exported to over 80 countries covering various applications, including seafood, protein, bakery, vegetable, fruits, etc. Square dedicate to deliver the superior quality freezing equipment to our client.
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