A flat cold finger type Stirling refrigerator cooling capacity measuring device

Abstract

The invention provides a flat-head cold finger type Stirling refrigerating machine cold quantity measuring apparatus. The apparatus is mainly composed of a flat-head cold finger, a vacuum flange, double-head studs, heat insulation support bars, compaction screws, an elastic pressure plate, a temperature measuring pressure block and a power pressure block, wherein the flat-head cold finger is fixed on the vacuum flange, the two heat insulation support bars are disposed at the two sides of the flat-head cold finger, one ends of the two heat insulation support bars are respectively fixed on the vacuum flange through the double-head studs, the elastic pressure plate is respectively fixed at the other ends of the two heat insulation support bars through the compaction screws, and the temperature measuring pressure block and the power pressure block are clamped between the end surface of the flat-head cold finger and the elastic pressure plate. According to the invention, since the temperature measuring pressure block and the power pressure block are compacted on the end surface of the flat-head fold finger by use of a screwing compaction mode of the elastic pressure plate, and the compaction strength can be adjusted. Compared to the prior art, contact thermal resistance between the flat-head cold finger and the temperature measuring pressure block and the power pressure block is reduced, and the cold quantity measuring result is accurate.

Description

technical field [0001] The invention relates to a cooling capacity measuring device, in particular to a cooling capacity measuring device of a flat-headed cold-finger Stirling refrigerator, which can be used as a cold-capacity measurement in the commissioning process of the flat-headed cold-finger Stirling refrigerator. Background technique [0002] The cooling capacity corresponding to different refrigeration temperatures is one of the important indicators for evaluating the performance of a Stirling refrigerator, and it is necessary to carry out multiple cooling capacity measurements under different refrigeration temperature conditions. During commissioning of the flat cold finger type Stirling refrigerator, since the cold finger is in the form of a flat head, it is difficult to fix the temperature measuring briquetting block and the power briquetting block on the end face of the flat cold finger. The briquetting block and the power briquetting block are pasted on the end ...

AI Technical Summary

Problems solved by technology

During commissioning of the flat cold finger type Stirling refrigerator, since the cold finger is in the form of a flat head, it is difficult to fix the temperature measuring briquetting block and the power briquetting block on the end face of the flat cold finger. The briquetting block and the power briquetting block are pasted on the end face of the flat-headed cold finger by glue, resulting in an increase in the contact thermal resistance and a large error in the measurement of the cooling capacity. In addition, due to the need to perform multiple cooling measurements on the same Stirling refrigerator , the traditional technology needs to remove the solidified glue on the surface of the flat cold finger, temperature measuring block and power pressing block at each measurement, usually using acetone soaking and blade stripping for a long time, which greatly affects the commissioning efficiency of the refrigerator

The existing flat cold finger type Stirling refrigerator cooling capacity measurement technology has the disadvantages of large cooling capacity measurement error, difficult operation, and low commissioning efficiency

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