Ultra-low temperature access system and working method thereof

Abstract

The invention relates to the field of ultra-low temperature saving, in particular to an ultra-low temperature access system and a working method thereof. The ultra-low temperature access system whichcan effectively protect organism performances and facilitate access and the working method thereof are provided. The ultra-low temperature access system comprises a sealed warehouse, the warehouse isprovided with an access window, a sample feeding area and a sample storage area are disposed in the warehouse, and the sample feeding area is located at the position of the window. The ultra-low temperature access system further includes a gradient cooling mechanism surrounding the sample storage area. The gradient cooling mechanism includes a plurality of annular cooling cavities formed by concentric annular air curtains, cooling devices are disposed at the positions of inlets of the cooling cavities to cause the temperatures of the cooling cavities from outside to inside to be subjected to gradient reduction, and outlets of the cooling cavities are communicated with the inlets respectively. The ultra-low temperature access system is simple in structure, convenient to operate, small in energy consumption and easy to maintain, and has good practicality in transportation or access in a high temperature difference environment.

Description

technical field [0001] The invention relates to the field of ultra-low temperature preservation, in particular to an ultra-low temperature access system and a working method thereof. Background technique [0002] With the development of medicine and biotechnology, the temperature requirements for the preservation of biological samples are getting higher and higher. The operating temperature of equipment used in medicine to preserve placenta, semen, bone marrow and special biological samples is required to reach -80°C, while the long-term storage temperature of cells is -130°C or lower. This ultra-low temperature or deep low temperature storage environment has a temperature difference of 100-200 °C from room temperature. If the temperature of the organism is dropped or heated up instantaneously, it will cause irreversible damage to the organism, greatly reduce its biological performance, or even lose its biological performance. [0003] At present, the common low-temperature...

AI Technical Summary

Problems solved by technology

This method has the following defects: (1) It still needs to be taken out during the transfer from higher temperature to lower temperature, and it will inevitably come into contact with the room temperature environment, which will affect the biological performance of the organism; (2) The cooling process is only based on the conduction of air , the cooling speed is slow; (3) In the low temperature environment, ice slag will be produced to cover the sample, which will not only cause the sample to freeze and move, but also cause unclear identification, which brings a lot of inconvenience to sampling; (4) Extremely high temperature difference environment Opening and closing the door will bring heating and moisture into the sample storage environment, which will have a great impact on the ultra-low temperature environment, resulting in a greatly shortened sample life cycle, which cannot be stored for a long time

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