Pulse tube/Stirling gas coupling composite multi-stage refrigerator

A pulse-tube refrigerator and pulse-tube refrigeration technology, applied in refrigerators, refrigeration and liquefaction, compressors, etc., can solve the problems that the length gap sealing of the ejector cannot be guaranteed, and the refrigeration temperature lower than 10K cannot be efficiently obtained, and the whole process can be achieved. The effect of compact structure

Inactive Publication Date: 2013-04-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a pulse tube / Stirling gas coupled composite multi-stage refrigerator, aiming at the technical difficulty that neither the current Stirling refrigerator nor the pulse tube refrigerator can efficiently obtain a refrigeration temperature lower than 10K, the refrigerator can Taking into account the performance of all levels, while avoiding the technical problem that the gap seal cannot be guaranteed due to the excessive length of the ejector, so as to obtain better performance and higher reliability

Method used

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  • Pulse tube/Stirling gas coupling composite multi-stage refrigerator
  • Pulse tube/Stirling gas coupling composite multi-stage refrigerator
  • Pulse tube/Stirling gas coupling composite multi-stage refrigerator

Examples

Experimental program
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Effect test

Embodiment 1

[0021] like figure 1 As shown, a two-stage pulse tube / Stirling gas-coupled composite multi-stage refrigerator includes: a linear compressor 1, an ejector drive motor 2, an expansion unit 3, an ejector 4, a hot end heat exchanger 5, a second First stage pulse tube refrigerator regenerator 6, first stage cold end heat exchanger 7, first stage pulse tube 8, first stage pulse tube hot end heat exchanger 9, first stage inertial tube 10, first stage Gas storage 11, second stage Stirling refrigerator cylinder 12, second stage cold end heat exchanger 13.

[0022] The connection relationship of the above-mentioned components is as follows: the linear compressor 1 is connected to the expansion unit 3 and the hot-end heat exchanger 5 respectively, and the ejector driving motor 2 is arranged in the expansion unit 3 and connected to the ejector 4 for driving the ejector 4 In operation, the hot end heat exchanger 5 and the first-stage pulse tube refrigerator regenerator 6, the first-stage ...

Embodiment 2

[0027] like figure 2 As shown, a three-stage pulse tube / Stirling gas-coupled composite refrigerator differs from Embodiment 1 in that a third-stage pulse tube is sequentially connected after the second-stage cold end heat exchanger 13 of Embodiment 1. Tube refrigerator regenerator 14, third-stage cold-end heat exchanger 15, third-stage pulse tube 16, third-stage pulse tube hot-end heat exchanger 17, third-stage inertial tube 18, and third-stage gas storage 19 . By adding the third-stage pulse tube refrigerator, a lower refrigeration temperature can be obtained in the third-stage cold-end heat exchanger 15, thereby meeting the application requirements for lower temperatures.

Embodiment 3

[0029] like image 3 As shown, a three-stage pulse tube / Stirling gas-coupled composite refrigerator differs from Embodiment 2 in that the second-stage cold-end heat exchanger 13, the third-stage pulse-tube hot-end heat exchanger 17, the first The third-stage inertia tube 18 and the third-stage gas storage 19 are respectively connected to the thermal bridge 20. By cooling the third-stage inertia tube 18 and the third-stage gas storage 19 to a lower temperature, a larger phase adjustment angle can be obtained. Thus making the pulse tube / Stirling composite refrigerator more efficient.

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Abstract

The invention discloses a pulse tube / Stirling gas coupling composite multi-stage refrigerator which comprises a Stirling refrigeration unit and a pulse tube refrigeration unit, wherein the Stirling refrigeration unit and the pulse tube refrigeration unit are connected in a gas coupling mode and are driven by one same linear compressor; an opening part of an air cylinder of the Stirling refrigeration unit is fixed with a cold end heat exchanger of the pulse tube refrigeration unit in a sealing manner; an end part (filled with return heat fillers) of a discharger inside the Stirling refrigeration unit penetrates through a hot end heat exchanger, a first-stage pulse tube refrigerator return heater and a first-stage cold end heat exchanger of the pulse tube refrigeration unit in sequence, and is arranged inside the air cylinder; and the discharger is coaxially arranged with the first-stage pulse tube refrigerator return heater and is matched in a sliding manner. According to the pulse tube / Stirling gas coupling composite multi-stage refrigerator, multi-stage performances are all considered, so that optimal performances and the high reliability can be obtained; and compared with the conventional multi-stage pulse tube refrigerator, the pulse tube / Stirling gas coupling composite multi-stage refrigerator can obtain a large pressure ratio from the cold end through the control of the discharger, so that the lower refrigeration temperature and the large refrigeration amount can be obtained.

Description

technical field [0001] The invention relates to a composite refrigerator, in particular to a pulse tube / Stirling gas coupling composite multistage refrigerator. Background technique [0002] Regenerative refrigeration technology is an important branch of low-temperature refrigeration technology. Compared with other refrigeration technologies, due to the use of regenerators filled with high-volume specific heat capacity fillers, regenerative refrigeration technology has high efficiency, compact structure, and deep Low temperature (liquid helium temperature zone) and other advantages are currently widely used in military, national defense, energy, medical, low temperature physics and other fields. [0003] The Stirling refrigerator and the pulse tube refrigerator are two typical regenerative cryogenic refrigerators, which have been widely used in space missions, but these two models are relatively mature only in the 80K and 35K temperature regions. However, there are still gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/14
Inventor 甘智华王博刘东立王龙一张小斌张学军汪伟伟刘雨梦吴镁郭永祥
Owner ZHEJIANG UNIV
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