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Composite cryogenic refrigerator with pulse tube and j-t throttling for recovering sound work

A low-temperature refrigerator, pulse tube refrigeration technology, applied in refrigerators, refrigeration and liquefaction, compressors and other directions, can solve the problem of inability to solve the problem of high-efficiency cooling of pulse tube refrigerators, limiting the increase of COP of pulse tube refrigerators, and ineffective use of energy. and other problems, to achieve the effect of compact structure, high reliability and improved pressure ratio

Active Publication Date: 2015-11-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the same as other pulse tube refrigerators, the above-mentioned pulse tube refrigerator has the following technical problem: the sound work existing in the heat exchanger at the hot end of the pulse tube will be dissipated into equivalent heat in the phase modulation mechanism, and this part of energy It is not effectively utilized, resulting in a waste of resources, and also limits the further improvement of the COP of the pulse tube refrigerator
Moreover, this solution still cannot solve the problem of high-efficiency cooling in the temperature range below 15K for pulse tube refrigerators.

Method used

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  • Composite cryogenic refrigerator with pulse tube and j-t throttling for recovering sound work
  • Composite cryogenic refrigerator with pulse tube and j-t throttling for recovering sound work

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Embodiment 1

[0034] Such as figure 1 As shown, a pulse tube and J-T throttling composite cryogenic refrigerator for recovering sound work includes a pulse tube refrigeration unit and a J-T throttling refrigeration unit.

[0035] The pulse tube refrigeration unit includes a pressure wave generator 8 , a heat exchanger at the hot end of the regenerator 9 , a regenerator 10 , a heat exchanger at the cold end of the pulse tube 11 , a pulse tube 12 , and a heat exchanger 15 at the compression chamber. The inner cavity of the vessel 12 is provided with a piston 13, the piston 13 is in clearance fit with the vessel 12, the piston 13 divides the inner space of the vessel 12 into two parts, namely the compression chamber 16 and the pulse chamber 17, the piston 13 connects with the compression chamber through the spring 14 The walls of the heat exchanger 15 are connected, and the spring 14 is used to support the piston 13 and make the piston reciprocate along the axis of the vessel 12 under the pres...

Embodiment 2

[0047] Such as figure 2 As shown, a pulse tube and J-T throttling composite cryogenic refrigerator for recovering sound power, the pulse tube refrigeration unit in this embodiment adopts a gas-coupled two-stage joint structure, and the difference from Embodiment 1 is that:

[0048] The J-T throttling refrigeration unit also includes a second-stage interwall heat exchanger 23 and a second-stage precooling heat exchanger 24 . The outlet of the first-stage pre-cooling heat exchanger 4 is first connected with the high-pressure side pipeline of the second-stage partition heat exchanger 23 and the second-stage pre-cooling heat exchanger 24, and then connected with the high-pressure side of the partition wall heat exchanger 5 before throttling The pipeline is connected; the low-pressure side pipeline of partition heat exchanger 5 before throttling is first connected with the low-pressure side pipeline of second-stage partition heat exchanger 23 and then connected with the low-pressu...

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Abstract

The invention discloses a compound type cryogenic refrigerator with a pulse tube capable of recycling acoustic power and a J-T throttle. The compound type cryogenic refrigerator comprises a pulse tube cooling unit and a J-T throttle cooling unit. The pulse tube cooling unit comprises the pulse tube, a piston is arranged in the pulse tube and matches with the inner wall of the pulse tube in a sliding and sealed mode, and the piston divides the inner space of the pulse tube into two parts which are a compression chamber and an impulse chamber respectively. The J-T throttle cooling unit comprises a compressor and a high pressure side pipe line communicated with a high pressure outlet of the compressor, and the high pressure outlet of the compressor and an inlet of the high pressure side pipe line are communicated with the compression chamber in a one-way mode through a pipe line with an inlet and exhaust valve group. The compound type cryogenic refrigerator can recycle the acoustic power at the hot end of the pulse tube, and the acoustic power is used for improving high pressure of the J-T throttle cooling unit. Compared with the prior art, the whole compound type cryogenic refrigerator is more compact in structure, more reasonable in energy utilization, and higher in the refrigeration performance of the whole compound type cryogenic refrigerator.

Description

technical field [0001] The invention relates to a low-temperature refrigeration system, in particular to a pulse tube and J-T throttling composite low-temperature refrigerator for recovering sound work. Background technique [0002] Regenerative cryogenic refrigeration technologies are represented by Stirling refrigerators, G-M refrigerators and pulse tube refrigerators, which use the ideal gas properties of the gas working medium above the transition temperature and relatively low pressure to be able to operate in the temperature range above 15K. Obtain high refrigeration performance, and have been maturely used in low-temperature refrigeration fields such as the ground and even space. J-T throttling uses the non-ideal gas properties of the gas working fluid below the transition temperature and relatively high pressure to obtain a more efficient refrigeration effect. Therefore, the regenerative low-temperature refrigerator is used to pre-cool the J-T throttling refrigerato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/00
Inventor 刘东立甘智华郭永祥陶轩邓皓仁孙潇王博王龙一
Owner ZHEJIANG UNIV