1.** Self-pressurized liquid nitrogen tank * *:
-* * Design features * *: Self-pressurized liquid nitrogen storage tanks are usually designed with built-in air chambers, which are connected with liquid nitrogen storage chambers. With the evaporation of liquid nitrogen, the nitrogen produced by evaporation is collected in this gas chamber, thus generating pressure. This pressure can be used to push liquid nitrogen out of the container.
-* * Use * *: Mainly used in places where liquid nitrogen needs to be used continuously or intermittently, such as laboratories and medical fields.
2.** Dewar bottle * *:
-* * Design features * *: Duwa tank is a vacuum insulated container, which consists of two glass or metal containers. Vacuum is pumped between the inner and outer containers to reduce heat exchange. The inner container is usually used to store cryogenic liquids, such as liquid nitrogen.
-* * Use * *: Mainly used for short-term storage and transportation of cryogenic liquids, such as liquid nitrogen and liquid helium in the laboratory.
To sum up, the self-pressurization liquid nitrogen tank emphasizes its self-pressurization function, which is convenient for users to push out liquid nitrogen without an external pump or air source when using liquid nitrogen; Dewar bottle, on the other hand, focuses on its heat insulation performance, which is used to store and transport cryogenic liquids. Both of them have their own characteristics in design and use, but they are both important tools in cryogenic liquid storage and transportation.