The utility model discloses a biological ultra-low temperature vacuum
liquid nitrogen box which comprises a heat insulation base, a vacuum outer
system, a vacuum inner shell
system, a
waste material pipe, a cover plate table and a
liquid nitrogen inlet and outlet, the bottom of the vacuum outer
system is fixedly installed on the top of the heat insulation base, the vacuum inner shell system is fixedly installed in the vacuum outer system, and the
waste material pipe is connected with the cover plate table. And the
waste material pipe is fixedly mounted on one side of the vacuum external system. The whole design operation process of the ultralow-temperature
liquid nitrogen box is carried out under a low-temperature condition, so that the primitiveness and the integrity of a biological sample are protected to the greatest extent, the activity of the biological sample is not damaged, more, better and more real data can be obtained, and the ultralow-temperature liquid
nitrogen box is particularly suitable for some low-abundance and easily-degradable samples. Low-temperature operation has very obvious advantages, a low-temperature environment in a sampling process is kept, and a sample is not damaged; the vacuum interlayer technology isolates
cold air and prevents the periphery from frosting and condensing; the sample
test tube is provided with double stations, multiple samples are collected simultaneously, and cross
contamination of the samples is prevented.