The liquid nitrogen tank is manufactured according to the vacuum jacket insulation principle invented by the British scientist Dewar in 1898, which is also called the liquid nitrogen biological container. It is a kind of biological storage container that scientifically solves the problem of large amount of liquid nitrogen evaporation loss caused by heat convection, conduction and radiation in the container during liquid nitrogen storage.
 
The liquid nitrogen tank is a kind of low temperature container. When we use it normally, liquid nitrogen will be stored in the container in order to store biological samples, cells, vaccines, embryos, organs, etc. In the process of normal low-temperature storage, samples need to be taken out and put in, and careless operation will cause biological samples to fall into the bottom of the tank. So, how should we take it out? How to operate it safely?
 
When storing biological samples, we need to use buckets or baskets to store them, and when we are taking them out or putting them in, it may cause the test tube to fall into the bottom of the tank. In such a case, we can put the samples in the cryogenic container into other tanks or in the special liquid nitrogen foam box, then pour out the liquid nitrogen in the tank, so that the foreign objects can be taken out smoothly. We can also pour everything in the tank into a metal bucket, but note that a plastic bucket is not allowed, and then slowly pour the liquid nitrogen in the bucket into the liquid nitrogen tank, but we have to intercept the specimen to avoid unnecessary trouble. Do remember to wear antifreeze gloves during operation to prevent the operator from causing skin frostbite.
 
The liquid nitrogen tank has the advantages of low daily evaporation rate of static liquid nitrogen and long shelf life. Liquid nitrogen tanks are widely used in biology, medicine, animal husbandry, etc., and are mainly used for the frozen storage of livestock semen, the cryopreservation of human organs, skin, blood, and cells in the medical and health industry, bioengineering, industrial cold assembly, metal materials cold processing, cryogenic crushing, superconductivity and other fields. When the liquid nitrogen tank is not in use, it needs to be cleaned with clean water, and then the water is drained.