Non-active cooling low-temperature storage and transportation device based on multilayer phase-change material

Abstract

The invention discloses a non-active cooling low-temperature storage and transportation device based on a multilayer phase-change material, and belongs to the field of low-temperature storage of biological materials. The device comprises a plurality of phase change material layers and heat insulation layers which are alternately arranged, a to-be-stored biological material is arranged in the center of an innermost phase change material layer, the phase change temperature area of a phase change material layer adjacent to the biological material is equal to or lower than a target storage temperature, and the phase change temperature areas of all the phase change material layers are sequentially increased or equal in a direction from inside to outside. The storage and transportation temperature and effective storage time requirements required by different biological materials can be met, longer effective storage time can be achieved under the same space condition, and for low-temperaturestorage and transportation of a liquid nitrogen temperature area, a longer effective storage time can be achieved with a relatively small amount of liquid nitrogen.

Description

technical field [0001] The invention belongs to the field of cryogenic preservation of biological materials, in particular to a low-temperature storage and transportation device without active cooling based on multilayer phase change materials. Background technique [0002] At room temperature, biological materials such as isolated cells, tissues, and organs cannot survive for a long time without maintaining their physiological properties. The metabolism in organisms is subject to the Arrhenius (Arrhenius) relation: k=Aexp(-E / RT), where k is the biochemical reaction rate, A is the Arrhenius factor, E is the activation energy, and R is the gas constant , T is the thermodynamic temperature. It can be seen that low temperature can inhibit the biochemical activities of organisms. In view of this, cryopreservation is often used in medicine, pharmaceuticals, food, agriculture and other fields. At present, the temperature zones commonly used for the preservation of biological ma...

AI Technical Summary

Problems solved by technology

Even so, the problem of gas generated by the vaporization of liquid nitrogen is still unavoidable, which limits the use of this type of cryogenic storage and transportation device in some occasions. For example, in air transportation, liquid nitrogen is clearly listed as a dangerous product, and its use must be reduced as much as possible quantity

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