Low-temperature pulse tube refrigerator with mixed structure

Abstract

The invention provides a low-temperature pulse tube refrigerator with a mixed structure. The low-temperature pulse tube refrigerator comprises linear compressor assemblies, wherein the linear compressor assemblies are oppositely arranged, the compressor piston movement is opposite in direction, and the generated vibration is totally offset. Compressor cavities of the compressor assemblies are communicated with each other to form a total compression cavity. A room temperature discharger structure working in a room temperature region is introduced into the total compression cavity. The structure divides the total compression cavity into two parts and is composed of two symmetrical discharger pistons and two symmetrical plate springs. The plate springs are fixedly connected with the discharger pistons and play a supporting and fixing function on the discharger pistons. The two ends of the discharger pistons are free of area difference and high in phase adjustment ability. The discharger structure push the pistons to move through the plate spring rigidity and the pressure difference on the two sides so as to adjust the sound field distribution of a whole machine, impedance boundary adjustment with a pressure fluctuation phase leading the volume flow rate is formed at the hot end of a pulse tube, the acoustic power at the hot end of the pulse tube is recycled, and the performance of the refrigerator is improved, that is, the advantages that the low-temperature side of the pulse tube refrigerator is free of movement components is maintained, and the two ends of the discharger pistons are free of the area difference, the reliability of the whole machine can be improved, and manufacturing difficulty can be lowered.

Description

technical field [0001] The invention relates to the technical field of cryogenic refrigerators, in particular to a low-temperature pulse tube refrigerator adopting a hybrid structure in the technical field of regenerative cryogenic refrigerators. Background technique [0002] With the rapid development of modern information technology, space technology, superconducting electronics, infrared detection, low-temperature biomedicine, gas liquefaction and other industries, especially the promotion and application of low-temperature electronic devices and low-temperature superconducting magnets in various fields, and the development of liquefied natural gas Large-scale use has greatly promoted the development of related low-temperature refrigerator industries. [0003] In the field of small low-temperature refrigerators, the main implementation method is a regenerative heat engine, including G-M refrigerators, G-M pulse tube refrigerators, Stirling refrigerators and Stirling pulse...

AI Technical Summary

Problems solved by technology

First of all, limited by the structure of the inertial tube and other conditions, the phase modulation range of the inertial tube is limited, resulting in a large loss in the regenerator

In addition, the inertial tube consumes part of the sound work and cannot recover the sound work at the hot end of the refrigerator, resulting in a further reduction in efficiency

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