Liquid Nitrogen Tunnel Freezer

Product Overview

The Liquid Nitrogen Tunnel Freezer is an ultra-low temperature freezing system designed for rapid, efficient food freezing and preservation. Using liquid nitrogen as the cooling medium, it quickly reduces food products to extremely low temperatures, maintaining freshness, taste, and nutritional value. The system is compact, easy to operate, energy-efficient, and environmentally friendly, making it ideal for food processing, cold chain logistics, and high-end catering applications.

Working Principle

The system consists of a base frame, insulated upper and lower chambers, lifting mechanism, conveyor belt, LN2 supply system, control system, nitrogen exhaust system, and low-temperature alarm system.

Food products are transported via a stainless steel mesh conveyor through three main zones: pre-cooling, liquid nitrogen spraying, and temperature equalization. Liquid nitrogen is atomized and mixed with circulated air to achieve counterflow heat exchange, rapidly freezing the product. Evaporated nitrogen gas is extracted by exhaust fans, ensuring uniform temperature distribution, reducing oxidation, and inhibiting microbial growth. The lifting design facilitates cleaning and maintenance, while the PLC control system allows both automatic and manual operation, ensuring precise and stable freezing.

Key Features

• Ultra-Low Temperature Freezing:Reaches temperatures as low as -196 °C, achieving fast freezing and high throughput.
• Energy Efficient & Eco-Friendly:Lower energy consumption and minimal cooling loss compared to conventional freezing methods.
• Optimized LN2 Usage:Precise control of liquid nitrogen consumption for efficient freezing.
• Food Quality Protection:Minimal moisture loss ensures frozen food retains its original flavor and texture after thawing.
• Extended Shelf Life:Ultra-rapid freezing reduces oxidation, extending product storage life.
• Compact & Low-Power:Space-saving design with low operational power requirements, reducing investment costs.
• Modular Design:Scalable for increased capacity and future upgrades.
• Safe & Reliable:Non-polluting LN2 cooling with integrated oxygen concentration monitoring for operator safety.
• Easy Operation:Human-machine interface (HMI) with PLC control supports one-button automatic or manual operation.
• Simple Cleaning & Maintenance:Lifting tunnel design allows quick access for cleaning, ensuring continuous production.

Applications

• Food Processing & Quick Freezing:Rapid freezing of meat, seafood, fruits, vegetables, and processed foods to maintain freshness.
• Cold Chain Logistics:Ideal for frozen storage and long-distance transportation with stable low temperatures.
• High-End Catering & Restaurants:Ensures frozen ingredients retain taste and nutritional quality, meeting high culinary standards.
• Food R&D & Testing:Used for testing new product freezing performance, quality control, and process development.
• Microbial Control & Food Safety:Ultra-low temperature environment suppresses microbial growth, ensuring safe and hygienic products.