● Rapid Freezing: Ultra‑low temperature of liquid nitrogen enables ultra‑fast freezing, reduces ice crystal formation and improves product quality.
● Moisture Loss Reduction: Minimizes juice loss upon thawing, preserving the original weight and texture of food.
● High Efficiency & Energy Saving: Faster freezing speed and lower energy consumption compared with conventional equipment.
● Quality Assurance: Rapid freezing maximally retains food’s original colour, aroma, flavour and nutrition.
The liquid nitrogen tunnel freezer is a quick‑freezing equipment that uses liquid nitrogen as the cooling medium, widely applied in the food processing industry. It can freeze food below ‑196°C within an extremely short time, effectively preserving the colour, aroma, flavour and nutritional components of food. It is especially suitable for the production of high‑quality frozen food.
Process Flow
1.Pretreatment: Food raw materials usually require pretreatment before entering the freezer, including washing, peeling, cutting and sorting, to guarantee freezing performance and product quality.
2.Conveyor Transport: Pretreated food is placed on the conveyor belt, which continuously feeds products into the liquid nitrogen tunnel freezer.
3.Liquid Nitrogen Spraying / Immersion: Inside the tunnel, liquid nitrogen rapidly cools down the food surface by spraying or immersion. The ultra‑low temperature of liquid nitrogen enables food to pass quickly through the zone of maximum ice‑crystal formation, reducing cell damage and preserving food texture and nutrition.
4.Rapid Freezing: Food is frozen rapidly in the low‑temperature environment. The whole process generally takes only several minutes. Rapid freezing effectively locks in moisture and flavour of food.
5.Discharge: Frozen food is discharged from the end of the tunnel for subsequent packaging and storage.
| Model | Dimension (m) | Belt Width (m) |
| GL-N-6-0.8 | 6.5*1.72*2.1 | 6/0.8 |
| GL-N-9-0.8 | 9.5*1.72*2.1 | 9/0.8 |
| GL-N-14-0.8 | 14.5*1.72*2.1 | 14/0.8 |
| GL-N-6-1.25 | 6.5*2.17*2.1 | 6/1.25 |
| GL-N-9-1.25 | 9.5*2.17*2.1 | 9/1.25 |
| GL-N-14-1.25 | 14.5*2.17*2.1 | 14/1.25 |
| Inlet Height | 900mm | |
| Max Frozen Product Height | 100mm | |
| Voltage | 380V/220V | |
| Exhaust Pipe Size | 300mm |
The liquid nitrogen tunnel freezer can rapidly freeze meat, seafood, fruits & vegetables, pasta products, dairy products, instant food and other processed foods, maintaining their colour, texture and nutrition.
