Why Use LN2 Quick Freezing
The temperature of liquid nitrogen is -196℃. When it contacts food it vaporizes and exchanges heat directly with the food. Compared with relying solely on compressor refrigeration, LN2 quick freezing lets food pass more quickly through the 0℃～-5℃ maximum ice crystal growth zone, forming finer ice crystals and reducing the drip loss caused by ice crystals piercing the cell structure.
After vaporization, liquid nitrogen becomes inert nitrogen gas, which does not oxidize the food or affect its color.
Applications by Industry
🦐 Seafood Processing
Seafood needs to be frozen as soon as possible after catching or processing to preserve texture and tissue condition. LN2 quick freezing is suitable for rapid freezing of single varieties such as shrimp, fish fillets, fish heads, shellfish, sea cucumber and oysters.
Common equipment: LN2 Blast Freezer, LN2 Tunnel Freezer (continuous production line)
🥩 Meat & Poultry
Frozen meat requires the core temperature to reach below -18℃. LN2 quick freezing is suitable for cut meat, lamb skewers, poultry cuts and other categories, with less tissue fluid loss after freezing.
Common equipment: LN2 Blast Freezer, LN2 Tunnel Freezer
🍱 Prepared Food and Central Kitchens
Prepared dishes and prepared foods are sensitive to freezing speed; rapid freezing reduces drip loss after thawing and preserves product form. It is suitable for central kitchen finished products, skin-pack semi-finished products and prepared food packs.
Common equipment: LN2 Tunnel Freezer, LN2 Blast Freezer, Blast Chiller (for pre-stage cooling)
🥖 Bakery
Baked goods such as bread, cakes and mooncakes need rapid cooling after coming out of the oven to enter the packaging stage, shortening the time spent in the danger temperature zone.
Common equipment: Blast Chiller (forced cold-air circulation, minimum -45℃ inside)
🎋 Fruit & Vegetable Processing
Bamboo shoots and fruit & vegetable materials can have their supply cycle extended through freshness-locking quick freezing. LN2 quick freezing causes little damage to plant cells.
Common equipment: LN2 Blast Freezer
🍹 Juice & Beverage Materials
Juice and fruit pulp materials have strong seasonal dependence and need to be frozen within a relatively short harvesting and processing period to avoid rising bacterial counts. LN2 quick freezing can increase freezing capacity per unit time.
Common equipment: LN2 Blast Freezer, LN2 Tunnel Freezer
Information Needed for Selection
Equipment configurations vary greatly for different products and packaging methods. When selecting, please provide:
| Item | Description |
|---|---|
| Material type and form | Unpacked / packaged, single-piece dimensions and weight per pack |
| Weight per batch or hourly capacity | kg/batch or kg/h |
| Infeed temperature | Temperature of the material when it enters the freezer |
| Target core temperature | Temperature required at discharge |
| Freezing process temperature | Required operating temperature of the equipment |
| Site and power supply | Available area, ceiling height, power supply specifications |
| LN2 supply | Liquid nitrogen tank and delivery conditions |
Send us your product information, and we will determine the process route and provide an equipment configuration plan.