Working medium pollution sampling and analyzing device for small-sized mechanical refrigeration machine

Abstract

The invention discloses a contaminated working medium sampling and analyzing apparatus used for a micro mechanical refrigerator. The apparatus adopts a two-way gas-sampling valve, a micro stainless-steel bellows valve, a sampling steel bottle, a vacuum pump interface, a spectrum analyzer interface, a vacuum pump, spectrum analyzer and a heating table which are movably connected with a charge valve seat of the refrigerator to realize the analysis to the content and components of the contaminated working medium. The apparatus is characterized in that the gas sampling volume is small and the pressure can decrease automatically; the sampled gas has no impact on the refrigeration performance and the sampling can be carried out for many times by interval; the low gas-releasing rate of the sampling device and the high-temperature exhausting process have no impact on the analysis result; the sampling device can be demounted and then the operation is convenient so as to realize the sampling and analyzing at different places; the analysis precision to the gas medium contamination can reach the requirement of the working medium purity of long service-life mechanical refrigerators; the quantitative evaluation of the working medium contamination can be realized. The method and apparatus can be used for the working medium content analysis for micro-stirling and pulse tube refrigerators and also can be used for analyzing the components and contents of other applied gases.

Description

technical field [0001] The invention relates to a sampling and analyzing device for working medium pollution of a micro mechanical refrigerator, in particular to a sampling and analyzing device for working medium pollution of a micro mechanical refrigerator such as long-life Stirlings and pulse tubes in low temperature regions. Background technique [0002] In recent decades, the rapid development of space infrared remote sensing, superconducting filtering, deep space exploration and other major national defense, communication, and detection technologies has promoted the development of micro-mechanical refrigeration applications. Stirling, pulse tube and other micro-mechanical refrigerators have the advantages of low refrigeration temperature, large cooling capacity, high efficiency, and small size. As the best cold source, they can provide the low-temperature working environment required by detectors in infrared remote sensing and superconducting equipment . For space appl...

AI Technical Summary

Problems solved by technology

Based on the above requirements, the current analysis devices and methods cannot realize the non-destructive analysis of the gas working fluid of the refrigerator.

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