The tunnel blast freezer is a highly efficient continuous quick-freezing equipment. Utilizing an insulated tunnel structure and an automated conveying system, it rapidly freezes food in a low-temperature environment of -30℃ to -40℃ using strong cold air at 3-6m/s, enabling batch and continuous food processing. It is widely applicable to the quick-freezing processing of various foods, including seafood, poultry, fruits, vegetables, dairy products, and noodle products. And it can perform various processing methods according to product form, such as dicing, slicing, and whole-fruit processing. It is a core piece of equipment for quick-frozen food production enterprises to increase production capacity and ensure product quality.
Parameters of the IQF Tunnel Freezer
| Parameter | Details | |||
| Model | FL-100 | FL-200 | FL-300 | FL-400 |
| Dimension (L*W*H, mm) | 6600*2300*2200 | 9300*2400*2200 | 11500*2500*2200 | 13800*2500*2200 |
| Mesh Belt Width (mm) | 1200 | 1300 | 1400 | 1400 |
| Inlet Length (mm) | 900 | 900 | 900 | 1000 |
| Outlet Length (mm) | 600 | 600 | 600 | 800 |
| Refrigeration Capacity (kW) | 20 | 38 | 56 | 73 |
| Installed Power (kW) | 4 | 6 | 10 | 11 |
| Compressor Power (kW) | 30 | 60 | 95 | 130 |
| Total Power (kW) | 28 | 54 | 80 | 110 |
Features of the Tunnel Blast Freezer
- Reverse Convection Airflow: The tunnel freezer employs a reverse convection design, where the cold air flows in the opposite direction to the movement of the goods. The cold air directly acts on room-temperature food entering the tunnel, maximizing heat exchange efficiency and shortening the time the food spends passing through the ice crystal formation zone.
- Dual-Medium Synchronous Defrosting: The evaporator defrosting uses a simultaneous process of hot ammonia and water. Compared to traditional single-mode defrosting, the defrosting cycle is significantly shortened, reducing production downtime and ensuring continuous equipment operation.
- Insulated Tunnel Design: The main body of the tunnel blast freezer is a sealed tunnel structure built with insulating materials, effectively blocking external heat intrusion and maintaining a stable low-temperature environment of -30℃ to -40℃ inside the tunnel, reducing cooling loss.
- High-Volume Cooling: Axial flow fans provide high-speed cold air at 3-6 m/s. The large air volume and stable air pressure allow for rapid penetration of the food surface, achieving uniform freezing and preventing localized under-freezing or over-freezing.
Advantages of the Tunnel Blast Freezer
- High Freezing Efficiency: The combination of reverse convection airflow and high-volume cooling significantly increases the freezing speed of food. This enables continuous, large-scale food production, meeting the production capacity needs of large-scale frozen food enterprises.
- Reduced Nutrient Loss: The rapid freezing process allows food to pass through the ice crystal formation zone in a short time, reducing the formation of large intracellular ice crystals and preventing cell damage. It effectively preserves the food’s moisture, nutrients, and original texture.
- Low Downtime Losses: The dual-medium synchronous defrosting system significantly shortens defrosting time, reducing production interruptions caused by defrosting. It can reduce production capacity losses and energy waste due to downtime.
- Wide Applicability: The IQF freezing tunnel is compatible with various food products, including seafood, poultry, fruits, vegetables, dairy products, and pasta products. It supports quick-freezing in various forms, such as diced, sliced, and whole fruit, adapting to diverse food production scenarios.
FAQ
The internal cavity has a stable temperature of -30℃ to -40℃. Regular thin slices of food are frozen through in 10 to 30 minutes. For large pieces of meat, the freezing time can be extended depending on the thickness.
The universal model requires no modification. Simply adjust the conveyor belt speed to switch between different product production, accommodating a variety of processing needs.
The tunnel freezer for sale offers a variety of mesh belt widths to choose from. For thin materials (shrimp, diced fruits and vegetables), choose the narrow mesh belt model. For large pieces of meat, whole fish, and whole fruits, choose the wide mesh belt model.
The problem may be due to improper wind speed or excessively high storage temperature. The commercial tunnel freezer supports fine-tuning of wind speed. After factory commissioning, it can stably control the water loss rate.
Your Trusted Partner- Foodline Machinery
Our factory has focused on the research and development and production of quick-freezing equipment for many years. We have our own standardized production workshop and handle the entire machine processing and assembly ourselves. Our company has professional refrigeration R&D engineers and an international trade technical team, providing customized solutions based on customers’ factory dimensions, product categories, and production capacity requirements. And our products sell well to major frozen food processing plants overseas, and over the years, we have earned long-term repeat purchases from overseas customers thanks to the superior quality of our equipment and comprehensive support services.
