Standard Dewar for measuring refrigeration performance of co-axial pulse tube refrigerator and manufacturing method of standard Dewar

Abstract

The invention discloses a standard Dewar for measuring refrigeration performance of a co-axial pulse tube refrigerator and a manufacturing method of the standard Dewar. The standard Dewar is composed of a vacuum cover, a measuring base, a corrugated pipe, a wiring seat, a pumping nozzle, an adjusting ring, a mount, a columnar thermometer and a heating plate. Functions of the vacuum cover, the heating plate and the thermometer are integrated. Thus the refrigeration performance of the co-axial pulse tube refrigerators within a certain size range is measured and evaluated in the convenient and rapid manner, interference factors of performance comparison of different co-axial pulse tube refrigerators are reduced in the maximum manner, the refrigeration performance comparison of the different refrigerators is more scientific, measuring time and resource of the refrigeration performance of the refrigerators is saved, and measuring efficiency is greatly improved.

Description

technical field

[0001] The invention relates to a Dewar, in particular to a standard Dewar for measuring the refrigeration performance of a coaxial pulse tube refrigerator and a manufacturing method. Background technique

[0002] The pulse tube refrigerator is a major innovation of the regenerative cryogenic refrigerator. It cancels the cold end ejector widely used in conventional regenerative cryogenic refrigerators (such as Stirling and G-M refrigerators), and uses heat The phase difference required for refrigeration is achieved by the operation of the end phase adjustment mechanism. The complete elimination of moving parts at the cold end has achieved low vibration, low interference and no wear at the cold end; and through important improvements in structure and phase modulation, in some typical temperature regions, its actual efficiency has reached regenerative low-temperature refrigeration highest value in the machine. These remarkable advantages have made pulse tube ...

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