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Gas coupling type multi-stage pulse tube refrigerator

A pulse tube refrigerator, gas coupling technology, applied in gas cycle refrigerators, refrigerators, refrigeration and liquefaction, etc., can solve the problems of increasing adjustment difficulty, achieving optimal state, and complex adjustment, and reducing adjustment difficulty. , the effect of reducing the volume

Active Publication Date: 2014-03-26
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, a thermally coupled multi-stage pulse tube refrigerator structure is adopted. The disadvantage of this structure is that two or more compressors are used in the system, and the number of compressors is determined by the number of stages of the refrigerator.
This structure leads to two obvious problems. First, the system is huge. Second, the adjustment is more difficult. The pulse tube refrigerator has a more complicated phase adjustment mechanism. If a multi-stage thermal coupling method is used, each stage has The phase modulation mechanism, and the phase modulation mechanisms between each stage affect each other, the adjustment is very complicated, it is difficult to make the system reach the optimal state, and it cannot achieve the cooling effect that the multi-stage pulse tube refrigerator should have

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the gas-coupled multistage pulse tube refrigerator of this embodiment is formed by coupling a precooling stage pulse tube refrigerator and a low temperature stage pulse tube refrigerator, which include a compressor 110 in fluid communication in sequence, and a precooling stage hot end Heat exchanger 111, primary regenerator 18, primary pulse tube 19, low temperature heat exchanger 17, secondary regenerator 15, secondary pulse tube 16, multi-channel bypass element 14, tertiary regenerator 12 , a three-stage pulse tube 13 and a low-temperature stage cold-end heat exchanger 11. In addition, the gas-coupled multi-stage multi-pass pulse tube refrigerator is also provided with a two-way inlet that is in fluid communication with the pre-cooling stage hot-end heat exchanger 111. Air valve 112 , precooling stage inertial pipe 113 , precooling stage gas storage 114 , and low temperature stage inertial pipe 115 connected to low temperature stage hot end ...

Embodiment 2

[0027] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the primary regenerator 28 and the primary pulse tube 29 are arranged in a U shape, the secondary regenerator 25 and the secondary pulse tube 26 and the tertiary regenerator 22 and the tertiary The pulse tube 23 is arranged in a coaxial type. In this embodiment, the air-coupled multi-stage multi-pass pulse tube refrigerator includes a compressor 211 in fluid communication in sequence, a pre-cooling stage hot-end heat exchanger 210, a primary regenerator 28, and a primary pulse tube 29, Low-temperature stage hot-end heat exchanger 27 , secondary regenerator 25 , secondary pulse tube 26 , multiple bypass elements 24 , tertiary regenerator 23 , tertiary pulse tube 22 and low-temperature stage cold-end heat exchanger 21 .

[0028] In the embodiment according to the present invention, in order to obtain the desired extremely low temperature, the pre-cooling stage pulse tube refrigera...

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Abstract

The invention discloses a gas coupling type multi-stage pulse tube refrigerator. The gas coupling type multi-stage pulse tube refrigerator comprises a precooling-stage pulse tube refrigerator body, a precooling-stage phase modulation mechanism, a low-temperature-stage pulse tube refrigerator body and a low-temperature-stage phase modulation mechanism. The precooling-stage pulse tube refrigerator body is coupled with the low-temperature-stage pulse tube refrigerator body. The precooling-stage pulse tube refrigerator body comprises a precooling-stage hot end heat exchanger, wherein the precooling-stage hot end heat exchanger is connected with the precooling-stage phase modulation mechanism. The low-temperature-stage pulse tube refrigerator body comprises a low-temperature-stage hot end heat exchanger, wherein the low-temperature-stage hot end heat exchanger is connected with the low-temperature-stage phase modulation mechanism. By means of the gas coupling type multi-stage pulse tube refrigerator, the size of the refrigerator can be reduced, the adjustment difficulty is lowered, and the lowest temperature reaches the temperature area below 10K.

Description

technical field [0001] The invention relates to the technical field of refrigeration systems in low-temperature regions, in particular to a gas-coupled multi-stage pulse tube refrigerator. Background technique [0002] At present, many high-precision remote sensing devices need to work at extremely low temperatures, that is, the temperature range below 10K. These devices are usually particularly sensitive to vibration and electromagnetic interference. Therefore, pulse tube refrigerators in extremely low temperature regions have become the preferred solution. From the current research results, the minimum cooling temperature of single-stage pulse tube refrigerators is about 20K. Low temperature, generally adopts multi-level structure. In the prior art, a heat-coupled multi-stage pulse tube refrigerator structure is adopted. The disadvantage of this structure is that two or more compressors are used in the system, and the number of compressors is determined by the number of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/14
CPCF25B2309/1406
Inventor 杨鲁伟杨俊玲周远
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI