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A kind of pulse tube refrigerator with hollow structure

A pulse tube refrigerator, hollow technology, applied in refrigerators, gas cycle refrigerators, refrigeration and liquefaction, etc., can solve the problems of maximum refrigeration capacity limitation and low efficiency, and achieve improved flow field distribution, uniform gas flow, The effect of suppressing secondary flow

Active Publication Date: 2020-02-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the maximum cooling capacity that can be obtained by a single-stage coaxial pulse tube refrigerator is limited. When the single-stage pulse tube refrigerator obtains a cooling capacity of 100W or even 500W at 80K, the efficiency is generally low, while the kilowatt-level Then use several cold heads to bypass this problem

Method used

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  • A kind of pulse tube refrigerator with hollow structure
  • A kind of pulse tube refrigerator with hollow structure
  • A kind of pulse tube refrigerator with hollow structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A pulse tube refrigerator with a hollow structure, such as figure 1 As shown, it includes a compressor 1, a cold head 2 and a phase modulator unit 3. The cold head 2 includes a hot-end heat exchanger 21, a regenerator 22, a cold heat exchanger 23, and a pulse tube 26. The pulse tube 26 and the regenerator The heat exchanger 22 is coaxially arranged inside and outside, and the hot end heat exchanger 21 and the cold heat exchanger 23 are arranged at both ends of the heat regenerator 22 . A pulse tube cold end gas homogenizer 25 is arranged at the cold end of the pulse tube 26, a pulse tube hot end gas homogenizer 27 is arranged at the hot end of the pulse tube 26, and a gas homogenizer at the cold end of the pulse tube 23 and the pulse tube cold end is arranged. A deflector 24 is arranged between the devices 25 .

[0041] In this embodiment, the compressor 1 is a linear compressor, including a cylinder body, a compressor piston 12 arranged in the cylinder body, and a com...

Embodiment 2

[0046] A pulse tube refrigerator with a hollow structure, such as figure 2 As shown, it includes a compressor 1, a cold head 2 and a phase modulator unit 3. The cold head 2 includes a hot-end heat exchanger 21, a regenerator 22, a cold heat exchanger 23, and a pulse tube 26. The pulse tube 26 and the regenerator The heat exchanger 22 is coaxially arranged inside and outside, and the hot end heat exchanger 21 and the cold heat exchanger 23 are arranged at both ends of the heat regenerator 22 . A pulse tube cold end gas homogenizer 25 is arranged at the cold end of the pulse tube 26, a pulse tube hot end gas homogenizer 27 is arranged at the hot end of the pulse tube 26, and a gas homogenizer at the cold end of the pulse tube 23 and the pulse tube cold end is arranged. A deflector 24 is arranged between the devices 25 .

[0047] In this embodiment, the compressor 1 is a linear compressor, including a cylinder body, a compressor piston 12 arranged in the cylinder body, and a co...

Embodiment 3

[0052] Such as image 3 As shown, on the basis of Embodiment 2, a partition 30 for supporting the tube wall of the vacuum tube 28 is provided inside the vacuum tube 28, and the partition 30 can prevent the vacuum tube from being deformed by compression. Several partitions 30 are arranged in the vacuum tube 28 , and the plurality of partitions 30 are parallel to each other, and each partition 30 is perpendicular to the tube wall of the vacuum tube 28 . The separator 30 is made of low thermal conductivity material, such as plastic, stainless steel and so on.

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Abstract

The invention relates to a pulse tube refrigerator of a hollow structure. The pulse tube refrigerator of the hollow structure comprises a compressor, a cold head and a phase modulator unit. The cold head comprises a hot end heat exchanger, a heat regenerator, a cooling capacity heat exchanger and a pulse tube. The pulse tube and the heat regenerator are coaxially arranged inside and outside. The pulse tube is internally provided with a hollow structure. An annular channel for gas to flow is formed between the hollow structure and the outer wall of the pulse tube, and the annular channel is separated from the hollow structure and does not communicate with the hollow structure. The pulse tube refrigerator of the hollow structure is simple in structure and easy to achieve. Compared with the prior art, the pulse tube refrigerator of the hollow structure has the beneficial effects that the pulse tube is internally provided with the hollow structure, the problem that the air flow fields in apulse tube in a large-cooling capacity coaxial pulse tube refrigerator are not distributed evenly is solved, the air flow in the pulse tube flows uniformly, and the single-pulse tube refrigerator canalso obtain large cooling capacity. The structure can be used for multiple kinds of coaxial pulse tube refrigerator. Meanwhile, the hollow structure can adopt a variable diameter structure or the annular channel adopts a variable cross section so that secondary flow in the pulse tube can be effectively restrained.

Description

technical field [0001] The invention belongs to the technical field of cryogenic refrigerators, in particular to a pulse tube refrigerator with a hollow structure. Background technique [0002] Since the invention of the small-hole pulse tube refrigerator in the 1980s, there have been various forms such as two-way inlet type, double-piston type, four-valve type, and inertial tube type. The performance of the pulse tube refrigerator is continuously improved with the improvement of the phase modulation mechanism at the hot end of the pulse tube. The pulse tube refrigerator has the advantages of good stability and no moving parts at the low temperature end. With the continuous improvement of efficiency, pulse tube refrigerators are gradually replacing G-M and Stirling refrigerators and becoming the mainstream low-temperature refrigerators in the market. In the coaxial type pulse tube refrigerator, the pulse tube and the inside and outside of the regenerator are coaxially arra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/14
CPCF25B9/145F25B2309/1414
Inventor 汪明君朱绍伟
Owner TONGJI UNIV