Sublimation dehydration device

Abstract

The invention discloses a sublimation dehydration device. The sublimation dehydration device comprises a heating supply device, a sublimation work box, and a vacuum pipe which comprises an outer pipeand an inner pipe sleeved with the outer pipe, a vacuum layer is arranged between the outer pipe and the inner pipe, an inner cavity is formed in the inner pipe, and a heat insulation layer is arranged between the inner pipe and the inner cavity; two ends of the vacuum pipe respectively communicate with the heating supply device and the sublimation working box; wherein the heating supply device isused for heating gaseous nitrogen and conveying the heated gaseous nitrogen to the sublimation working box along the inner cavity, and the gaseous nitrogen flows in the sublimation working box and covers the surface of a freeze-thawed material; the pipe body structure of the vacuum pipe is provided with the outer pipe and the inner pipe, the vacuum layer is arranged between the outer pipe and theinner pipe, the inner cavity is formed in the inner pipe, the heat insulation layer is arranged in the inner cavity, heat exchange between gaseous nitrogen and the inner wall can be effectively blocked, and temperature control over the gaseous nitrogen is more sensitive.

Description

technical field [0001] The invention relates to the technical field of cell preservation, in particular to a sublimation dehydration device. Background technique [0002] The commonly used dehydration method for frozen-thawed materials such as frozen-thawed cells is to place the frozen-thawed materials in an atmospheric nitrogen environment, control the temperature rise and fall of the nitrogen gas, sublimate the solid water in the frozen-thawed materials, and dehydrate the frozen-thawed materials. This method corresponds to In the sublimation dehydration device, the controller controls the evaporator to evaporate liquid nitrogen to create a nitrogen environment, and controls the heater to control the temperature of the nitrogen in the sublimation chamber to achieve normal pressure sublimation dehydration of the frozen-thawed materials in the sublimation chamber; however, the existing The inner wall of the vacuum tube in the sublimation dehydration device is directly in cont...

AI Technical Summary

Problems solved by technology

[0002] The commonly used dehydration method for frozen-thawed materials such as frozen-thawed cells is to place the frozen-thawed materials in an atmospheric nitrogen environment, control the temperature rise and fall of the nitrogen gas, sublimate the solid water in the frozen-thawed materials, and dehydrate the frozen-thawed materials. This method corresponds to In the sublimation dehydration device, the controller controls the evaporator to evaporate liquid nitrogen to create a nitrogen environment, and controls the heater to control the temperature of the nitrogen in the sublimation chamber to achieve normal pressure sublimation dehydration of the frozen-thawed materials in the sublimation chamber; however, the existing The inner wall of the vacuum tube in the sublimation dehydration device is directly in contact with nitrogen, and the heat contained in the heated nitrogen is directly absorbed by the inner wall, which reduces the time sensitivity of nitrogen temperature control and affects the sublimation and dehydration process of frozen-thawed materials.

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