Liquid nitrogen biological container is called liquid nitrogen tank for short, which can be generally divided into two types: storage liquid nitrogen tank and transport liquid nitrogen tank. It is commonly used in industrial cryogenic treatment, livestock sperm freezing, scientific research experiments and the emerging food and beauty industries.

One of the main reasons for condensed water droplets on the surface of the liquid nitrogen tank is water vapor in the air. Even in a relatively dry environment, the air contains a certain amount of moisture. When the liquid nitrogen in the liquid nitrogen tank is at an extremely low temperature (usually minus 196 degrees Celsius), the water vapor in the surrounding air will quickly condense into liquid water. These water droplets will form a thin layer of water film on the surface of the liquid nitrogen tank.

In addition, the surface temperature of the liquid nitrogen container is very different from the temperature of the liquid nitrogen inside. Due to the effect of heat conduction, the surface temperature of the tank will be much higher than the liquid nitrogen temperature. When water vapor in the surrounding air condenses on the surface of the liquid nitrogen tank, the tank with a higher surface temperature will quickly heat it, causing the condensed water droplets to evaporate quickly. This phenomenon is called "rapid vaporization."