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Flexible pulse tube refrigerator

A pulse tube refrigerator, a flexible technology, applied in refrigerators, gas cycle refrigerators, refrigeration and liquefaction, etc., can solve the problems of increasing machine complexity, reducing machine reliability, increasing vibration, etc., and achieve satisfactory phase modulation effect , the effect of simple structure

Inactive Publication Date: 2020-11-03
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this phase modulation method increases the complexity of the machine, reduces the reliability of the machine, and increases the vibration

Method used

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  • Flexible pulse tube refrigerator
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  • Flexible pulse tube refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this example, a new form of pulse tube refrigerator is called a flexible pulse tube refrigerator, such as Figure 4 , 5 shown. Change the part of the pulse tube 5 close to the hot end into a bellows, or change the entire pulse tube 5 into a bellows to replace the function of the room temperature piston. When the pulse tube 5 is in the inflation stage, the bellows become longer, which is equivalent to the expansion of the displacement piston , during the deflation stage of the pulse tube 5, the bellows becomes shorter, which is equivalent to the compression of the displacement piston, thereby recovering work. Obviously, the structure of the present invention is simpler and more compact, as long as the rigidity of the bellows is controlled, a satisfactory phase modulation effect can be achieved. At the same time, the present invention can also be used without an inertial tube.

Embodiment 2

[0024] Further, the present invention proposes a flexible gas storage pulse tube refrigerator. The existing gas storage 8 is a rigid container with a large volume, which is not conducive to space placement. The present invention proposes a flexible gas storage with variable volume, and the flexibility can be realized by bellows. Such as Figure 6 shown.

Embodiment 3

[0026] In addition, in order to improve the degree of laminarization in the pulse tube 5, for a large cooling capacity pulse tube refrigerator, when the diameter of the pulse tube is relatively large, the present invention proposes a parallel channel pulse tube refrigerator, such as Figure 7 shown. The parallel channel is made of polytetrafluoroethylene material and 3D printing technology. The thickness of the sheet is preferably 0.1mm, or 0.5mm. Both ends are fixed with rings, such as Figure 8 shown. At the same time, the parallel channel pulse tube refrigerator can also be combined with flexible pulse tubes and gas storage, such as Figure 9 shown.

[0027] The above inventions can all be used in the GM type pulse tube refrigerator, that is, the linear reciprocating compressor is replaced by high and low pressure gas cylinders and rotary valves.

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Abstract

The invention discloses a flexible pulse tube refrigerator. The refrigerator sequentially comprises a compressor, a heat regenerator hot end heat exchanger, a heat regenerator, a cold end heat exchanger, a pulse tube and a pulse tube hot end heat exchanger, and is characterized in that the whole pulse tube or the portion, close to a hot end portion, of the pulse tube is a flexible pulse tube, andthe flexible pulse tube is realized through a corrugated pipe. The refrigerator has the advantages that the structure is simple and compact, and the satisfactory phase modulation effect can be achieved only by controlling the rigidity of the corrugated pipe.

Description

technical field [0001] The invention relates to a flexible pulse tube refrigerator, which belongs to the technical field of pulse tube refrigerators. Background technique [0002] In the 1960s, Gifford and Longsworth in the United States discovered that when there is an alternating pressure wave in a hollow tube, the closed end of the tube will generate heat, and a temperature gradient will be formed along the axial direction, and then a regenerator will be installed. And the laminarization element, the low temperature can be obtained near the outlet of the compressor in the pulse tube, which is the prototype of the pulse tube refrigerator. With the advancement of research, it was found that optimizing the heat exchange equipment can effectively reduce the minimum refrigeration temperature of the pulse tube refrigerator, therefore, including the compressor, main cooler, regenerator, secondary cooler, pulse tube, laminarization The basic type of vessel comes out, such as fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/14
CPCF25B9/145F25B2309/1414
Inventor 祁影霞
Owner UNIV OF SHANGHAI FOR SCI & TECH