The spiral quick freezer uses liquid nitrogen as a refrigerant to directly freeze food. The principle of liquid nitrogen freezing is to spray low-temperature liquid nitrogen directly on the food, and use its low temperature (-196°C) of vaporization under normal pressure and the high heat transfer coefficient of direct vaporization of the material surface to rapidly deep freeze the food. So do you know why it can replace traditional refrigeration equipment?
1. Less dry food consumption.
There is a thin layer of ice film on the surface of each quick-frozen food, which is not only beneficial to maintain the freshness of the food, prevent oxidation, but also reduce drying consumption. Compared with mushrooms and strawberries, the thousand consumption of fluidized freezing is almost
Half of the forced air freezer. This is especially important for higher priced food items. Since the food is suspended during the freezing process, the frozen food will not stick together, realizing IQF freezing, which is not only of good quality, but also convenient for packaging and consumption by consumers.
2. The cooling speed is fast.
Liquid nitrogen was used as the refrigerant. Liquid nitrogen is an ultra-low temperature substance whose temperature can reach below -100°C. Freezing items in this device only takes a few minutes.
However, traditional refrigeration equipment often takes several hours to complete the freezing of goods, so it is superior to traditional refrigeration equipment in terms of cooling speed. The fluidized freezing process has strong heat transfer characteristics. Compared with the traditional air forced circulation refrigeration device, the
The heat intensity is increased by 30-40 times. This is because the thermal resistance of food suspension freezing is reduced by 15-18 times, the heat release coefficient between the product surface and cold air is increased by 4-6 times, and the effective heat exchange area is increased by 3.5-10 times. Time Magazine. Therefore, the freezing speed of the fluidized freezer is dozens of times that of the ordinary freezer. Due to the fast freezing speed, fluidized freezing can maintain the original nutrition and freshness of food to a large extent.
3. Higher cost performance.
Compared with traditional refrigeration equipment, the spiral quick freezer not only occupies a smaller area, but also has a simpler structure and less investment. After purchase, only need to connect the liquid nitrogen foot to realize continuous operation. However, conventional cooling
Equipment is difficult to use. Not only is the startup time long, but the frost on the evaporator needs to be cleaned every time it is used. Therefore, from the perspective of overall operational efficiency, it is obviously more cost-effective.
4. Good preservation effect.
During the freezing process of fruits and vegetables, due to the fast freezing speed, large ice crystals will not be formed in frozen fruits and vegetables, and the cell tissue of frozen fruits and vegetables will not be damaged. Water can determine the freshness of food. When traditional freezing equipment freezes fruits and vegetables, it often causes the loss of nutrients in fruits and vegetables.
5. It is easy to realize mechanization, automation and continuous production, and the production efficiency is high. Workers work at room temperature to improve working conditions.
6. The installation cost of the spiral quick freezer is low, the maintenance cost is low, the workshop space is saved, it is convenient to connect to the existing production line, and the cleaning time is saved.
Post time: Feb-05-2023