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Pulse tube refrigerator

A pulse tube refrigerator and pulse tube technology, which are applied in refrigerators, gas cycle refrigerators, refrigeration and liquefaction, etc., can solve the problems of limited phase modulation range of inertial tubes, increased pre-cooling stage load, and low adjustment flexibility. Achieve the effect of expanding the range of phase modulation, increasing phase modulation capability, and enhancing flexibility

Active Publication Date: 2017-06-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the phase adjustment range of the traditional structure inertial tube is limited, especially under the condition of small sound work in the deep low temperature area, it is necessary to use the low temperature inertial tube to enhance the phase adjustment, which also increases the load of the pre-cooling stage; and this fixed single tube structure is flexible to adjust The degree is low, and the coordinated phase modulation cannot be carried out under the condition of changing operating parameters such as frequency and input power

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0039] Such as image 3 As shown, the pulse tube refrigerator of this embodiment includes: a linear compression device 1, a transfer pipe 2, a heat exchanger 3 at the hot end of the regenerator, a heat exchanger 4 at the cold end of the regenerator, and a heat exchanger 5 at the cold end of the regenerator connected in sequence. U-shaped connecting pipe 6, pulse tube cold end heat exchanger 7, pulse tube 8, pulse tube hot end heat exchanger 9, parallel inertia tube 12, gas storage 11, and regulating valve 13 installed near the inlet of parallel inertia tube 12 .

[0040] While the prior art refrigerators such as Figure 4 As shown, except that the inertial tube 10 is a single piece, other structures are the same as in this embodiment.

[0041] In the vector diagram, the impedance of the hot end of the vessel (i.e. the entrance of the inertial tube 10) is shown as Figure 5 shown. The horizontal axis represents the impedance R, and the vertical axis represents the inductive...

Embodiment 2

[0044] Such as Figure 7 As shown, the structure of this embodiment is basically the same as that of Embodiment 1, the difference is that three parallel inertial tubes 13 are connected between the pulse tube hot end heat exchanger 9 and the gas store 11, and the regulating valve 13 on each inertial tube branch They are all installed near the inlet of the inertia tube. Under different operating conditions, different inertia tube combinations are formed by opening and closing the regulating valve 13, or the regulating valve 13 on each parallel branch is adjusted to meet the phase adjustment under the corresponding working conditions. need.

Embodiment 3

[0046] Such as Figure 8 As shown, the structure of this embodiment is basically the same as that of Embodiment 1, except that, under the conditions of inlet pressure ratio of 1.2, frequency of 60Hz, and inflation pressure of 2.0MPa, the length or diameter of the parallel inertial tubes is different, and the specific selection depends on the actual According to the requirements of the phase adjustment angle, the two inertial tubes are connected between the heat exchanger 9 at the hot end of the pulse tube and the gas storage 11, and the longer inertial tube 15 can be bent adaptively.

[0047] Such as Figure 9 As shown, under the conditions of inlet pressure ratio of 1.2, frequency of 60Hz, and inflation pressure of 2.0MPa, it can be obtained through simulation that within the range of length 2m to 2.5m, the phase modulation angle after parallel connection of inertial tubes of different lengths is larger than that of a single inertial tube. And slightly larger than the phase ...

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Abstract

The invention discloses a pulse tube refrigerator which comprises a compression unit, a transmission tube, a heat regenerator unit, a connecting tube, a pulse tube unit, an inertial tube unit and an air reservoir which are sequentially connected. The inertial tube unit comprises at least two mutually parallelly connected inertial tubes. According to the pulse tube refrigerator, phases are modulated by the parallel inertial tubes, and phase modulation capacity is enhanced, so that the performance of the refrigerator is improved. The branch inertial tubes can be combined in various modes, phase modulation flexibility is enhanced, and phase modulation range is widened.

Description

technical field [0001] The invention relates to the field of high-frequency pulse tube cryogenic refrigerators, in particular to a pulse tube refrigerator. Background technique [0002] With the development of military, aerospace, medical and space technology, precision equipment and electronic devices have more and more stringent requirements on the reliability, vibration and volume of cryogenic cooling technology, which makes the cold end have no moving parts, compact structure and long life The pulse tube refrigerator has become a research hotspot in the field of cryogenic refrigeration technology. In traditional low-temperature refrigerators (such as Stirling refrigerators or G-M refrigerators), relying on the reciprocating ejector in the expansion cylinder to provide the correct phase for the refrigerant to achieve efficient refrigeration. Therefore, an effective phase modulator must be added in the pulse tube refrigerator to compensate for the eliminated function of t...

Claims

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Application Information

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IPC IPC(8): F25B9/14
CPCF25B9/145F25B2309/1411
Inventor 植晓琴夏曦黄宸邱利民
Owner ZHEJIANG UNIV