The air from air is divided into oxygen and nitrogen, of which about 78.09% is air nitrogen, and liquid nitrogen is liquid nitrogen. Because of its ultra-low temperature, physical properties, swelling, asphyxiation, often used in industry. At present, the application of liquid nitrogen is more and more extensive, and liquid nitrogen is a special industrial product.

Because of the specificity of liquid nitrogen, good preservation is needed. The function of liquid nitrogen tank is to insist on liquid nitrogen and reduce transpiration. Therefore, regardless of the size of the liquid nitrogen tank, it has the characteristics of good heat preservation, durability and convenient use, and can better meet the application requirements.

A device that achieves its value through the physical properties of liquid nitrogen. Liquid nitrogen is colorless, tasteless, and extremely cold. At atmospheric pressure, the temperature is 196 C. The liquid nitrogen tank is made of the physical characteristics of the liquid nitrogen. Open the bottom of tank liquid pipeline discharge valve, liquid nitrogen transpirates through the pipeline through the transpirator at the bottom of the tank, and the gas vaporizes and enters the top of the tank. The tank pressure will supply liquid nitrogen when it is self-pressurized. The liquid nitrogen tank needs external gas. The liquid discharges pressure from the tank in the liquid, and then through the pipeline to the outside liquid nitrogen, releases gasification from the carburetor, and the semen is refrigerated and preserved. Nitrogen-filled environment for storage or vaccination.