Tunnel type liquid nitrogen freezer for food quick freezing and preservation equipment

Liquid nitrogen quick freezing machines are divided into four categories based on their structure and application scenarios: tunnel type, spiral type, box type, and immersion type. Among them, tunnel type liquid nitrogen quick freezing machines have become the core equipment in the field of food freezing and preservation due to their efficient and continuous operation characteristics. Its core working principle is to use the ultra-low temperature cooling capacity of liquid nitrogen -196 ℃ to quickly replace food heat and achieve rapid freezing. This process can instantly lock in food moisture, minimize water loss, and preserve the freshness, taste, and appearance of food intact. Its freezing effect is difficult to achieve with traditional compressor refrigeration technology.

Scope of application

Widely applicable to freezing and preservation scenarios in the food industry, fisheries, and other fields, it can efficiently freeze various types of seafood, livestock and poultry meat, whole fish, segmented fish meat, fruits and vegetables, buns, ready to eat fast food, baked goods, etc., meeting the freezing needs of diverse products.

Tunnel type liquid nitrogen freezer for food quick freezing and preservation equipment

Product Features

Efficient continuous operation: Adopting the design concept of easy operation and convenient cleaning, there is no need to stop the machine for defrosting, which can achieve uninterrupted continuous production and greatly improve production efficiency.

Wide temperature range adjustable: The working temperature can be set arbitrarily within the range of -30 ℃~-120 ℃, suitable for the quick freezing process requirements of different ingredients.

Intelligent control system: equipped with PLC programmable controller, Schneider electrical components, touch screen operation interface, real-time alarm device and frequency converter, to achieve precise control throughout the entire process.

Convenient operating experience: The operating system adopts a touch screen one click start mode, with intuitive and visible running data. The running speed and freezing temperature can be adjusted in real time, and the temperature changes inside the tunnel can be synchronously monitored.

Stable cooling circulation: The cooling circulation and exhaust system inside the tunnel consists of a dedicated motor and a low-temperature fan. The low-temperature fan does not need to be stopped for defrosting and can operate continuously without freezing, ensuring even freezing of food and maximizing the efficiency of refrigerant utilization.

Energy saving and energy-saving design: Based on the difference between the set temperature and the actual temperature, the valve opening is automatically adjusted to ensure uniform temperature inside the tunnel while effectively saving liquid nitrogen usage.

Sanitary and easy to clean: The tunnel cover can be vertically raised and lowered, making it convenient to use high-pressure water guns to clean the interior and ensure the hygiene and safety of frozen food.

Flexible and convenient assembly: Adopting a segmented design, the on-site lifting and assembly process is fast and efficient, adapting to the installation needs of different sites.

Core strengths

Intelligent control: The operating system is controlled by a PLC microcomputer, paired with a touch screen LCD display, integrating multiple automatic control functions such as energy regulation, fault diagnosis, and protection monitoring. The operating data is clear at a glance, and the operation is precise and efficient.

Environmentally friendly and pollution-free: Using liquid nitrogen as the cold source, liquid nitrogen is separated from air and directly returned to the air after use, without any pollutant emissions, in compliance with environmental standards.

Outstanding energy-saving: The frozen tunnel is divided into three temperature zones: pre freezing, quick freezing, and freezing. The PLC automatically controls the opening size of the liquid nitrogen valve based on the temperature difference, accurately adjusts the flow rate, and significantly reduces liquid nitrogen consumption.

Rapid freezing capability: Relying on the ultra-low temperature characteristics of liquid nitrogen -196 ℃, the temperature inside the tunnel can reach -130 ℃, and it can quickly complete heat exchange with the frozen product, achieving the preset freezing requirements in 20~40 minutes.

Reliable hygiene guarantee: equipped with an adjustable tunnel cover (optional), combined with high-pressure water gun cleaning, to achieve internal cleaning and ensure food hygiene from the equipment level.

Tunnel type liquid nitrogen freezer for food quick freezing and preservation equipmentSupport customization of functions, including all accessories and technical support services.