Strawberry tunnel type liquid nitrogen freezer manufacturer

Description :

　　Why choose liquid nitrogen as the refrigerant?

　　Liquid nitrogen is an environmentally friendly, colorless, transparent, and low viscosity liquid with stable chemical properties. It has a boiling point of -196.5 ℃ at atmospheric pressure, does not react chemically with frozen products, and is inert to food ingredients. Liquid nitrogen meets food hygiene requirements and is an ideal food preservative. The nitrogen content in the air is 78%, making it an inexhaustible and environmentally friendly refrigerant. Furthermore, by replacing the air that comes out of food, oxidation changes can be reduced to a smaller extent during freezing and packaging storage.

　　At standard atmospheric pressure, when liquid nitrogen absorbs heat and undergoes a phase transition to a gaseous state, it needs to absorb 199.29 KJ/KG of latent heat of vaporization, and then the low-temperature gas rising from -196.5 ℃ to -10 ℃ needs to absorb 202 KJ/KG of heat. Liquid nitrogen utilizes its very low-temperature heat absorption property to rapidly cool down, with a temperature difference of over 200 ℃. The intense heat exchange can freeze the frozen product instantly, forming a hard shell on the surface. The moisture inside the frozen product will not evaporate, resulting in a very low drying rate, almost zero. Due to the short freezing time of 5 to 10 minutes, which is 1/8 to 1/5 of the conventional freezing method, the ice crystals generated inside the frozen product are very fine and uniform, and the freezing speed is greater than the penetration speed of steam inside and outside the cell. Ice crystals are generated inside and outside the cell at the same time, without damaging the cell wall. Therefore, after thawing, the original color, aroma, taste, and freshness of the frozen product can be maintained. Liquid nitrogen quick freezing is currently one of the relatively advanced food quick freezing and preservation processes.

　　Single unit tunnel type liquid nitrogen quick freezing machine equipment - purpose

　　It is a large-scale quick freezing machine suitable for large-scale processing and production on factory assembly lines, with strong quick freezing ability; Easy to operate and highly automated. The series of liquid nitrogen quick freezing machines use heating technology, temperature control technology, and liquid nitrogen dispersion technology to ensure uniform and stable temperature control, constant temperature, and temperature reduction processes. Using liquid nitrogen as a refrigerant to meet cooling and environmental protection requirements. Quick freezing equipment comes in various specifications such as box type, cabinet type, tunnel type, etc., and can be designed and manufactured according to user requirements.

　　Freezing speed is fast. Compared with traditional air forced circulation freezing devices, the heat transfer intensity has increased by 30-40 times. This is because the thermal resistance during freezing decreases by 15-18 times, the heat release coefficient between the product surface and the cold air increases by 4-6 times, and the effective heat transfer area increases by 3.5-10 times. So the freezing speed is several tens of times faster than that of ordinary freezing devices. Due to its fast freezing speed, it can maintain the original nutritional content and freshness of food to the greatest extent possible.

　　Realize rapid freezing of individual units. After freezing, food will not stick together, achieving IQF freezing. Not only is the quality good, but it is also convenient for packaging and consumer consumption.

　　Food consumption is low. Each frozen food has a thin layer of ice film on its surface, which is beneficial for maintaining the freshness of the food and preventing oxidation, while also reducing dry consumption. Comparative experiments conducted by Swedish scholars on mushrooms, strawberries, etc. have shown that the dry consumption of liquid nitrogen freezing is almost only about half of that of forced air tunnel freezing. This is particularly important for higher priced foods.

　　Easy to achieve mechanization and automation for continuous production, with high production efficiency. Workers can operate at room temperature, improving working conditions.

　　Note: This product is a customized device, and the product parameters, other descriptions, and prices described on this platform are for reference only. Specific parameters and prices need to be determined according to customer needs. If you need to know specific parameters and prices, please consult our sales personnel.

AfterSalesService :

• Tunnel type liquid nitrogen quick freezing machine