Refrigeration principle of liquid nitrogen quick freezing machine

2020-08-10 16:19:27

Refrigeration principle of liquid nitrogen quick freezing machine

   Liquid nitrogen quick-freezer is a kind of rapid refrigeration equipment, which can reach -196 degrees Celsius in 5 minutes, and is widely used for quick freezing of various foods. So, what is its working principle and how does it achieve rapid freezing?

Refrigeration principle of liquid nitrogen quick freezer

   The principle of quick freezing of liquid nitrogen food: quick freezing of food generally refers to the use of modern freezing technology, using liquid nitrogen as the refrigerant to reduce the temperature of the food to the expected low temperature below its freezing point. All or most of the moisture contained in the food will form reasonable tiny ice crystals along with the heat inside the food. At the same time, the liquid nitrogen quick-freezer freezes part of the free water of the cells and reduces the water activity without the help of any preservatives and additives, and at the same time, the food nutrition is preserved to the greatest extent. It has the advantages of delicious, convenient, healthy, hygienic, nutritious and affordable original food.

The advantages of liquid nitrogen quick freezer frozen food

  1. Liquid nitrogen is non-toxic and inert to food ingredients. Furthermore, since it replaces the air coming out of the food, it can reduce oxidation changes to a very small extent during freezing and cold storage with packaging

  2. Liquid nitrogen can be in close contact with all parts of food with irregular shapes, which reduces the thermal resistance to a very small limit.

  3. The frozen food is of high quality. Since liquid nitrogen is in direct contact with food, it conducts strong heat exchange with a temperature difference of more than 200K, so the freezing speed is extremely fast, and the temperature can be reduced by 7-15K per minute. The ice crystals in the food are small and uniform, and the food quality after thawing is high.

Nuoruida (Tianjin) science and Technology Co., Ltd. is committed to research, development, and sales of liquid nitrogen freezer. Using European technology, we provide a variety of equipment. The main equipment is liquid nitrogen cryogenic freezer, liquid nitrogen cabinet freezer, liquid nitrogen tunnel freezer,sub-zero processing equipment, cryogenic freezing equipment, and so on.