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Phase modulation device, pulse tube refrigerator and phase modulation method based on eddy current damping

An eddy current damping, pulse tube refrigerator technology, applied in refrigerators, refrigeration and liquefaction, compressors, etc., can solve the problem of inability to provide suitable pulse tube refrigerators, and achieves overcoming insufficient phase modulation capability, efficient work, and high efficiency. cooling effect

Active Publication Date: 2020-01-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the above-mentioned common phase modulation method cannot provide suitable impedance for the pulse tube refrigerator at deep low temperature and actively adjust the impedance in real time according to the actual working conditions, the present invention provides a refrigerator impedance phase modulation device based on eddy current damping , through a reasonable design, the device can provide better impedance for the efficient operation of the pulse tube refrigerator, so that the pulse tube refrigerator can work efficiently

Method used

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  • Phase modulation device, pulse tube refrigerator and phase modulation method based on eddy current damping
  • Phase modulation device, pulse tube refrigerator and phase modulation method based on eddy current damping
  • Phase modulation device, pulse tube refrigerator and phase modulation method based on eddy current damping

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Effect test

Embodiment 1

[0059] Such as figure 1 As shown: a refrigerator impedance active phase modulation device 1 based on eddy current damping includes: a casing 2, a piston 3 connected in the casing 2 through a spring 4, a magnetic field generating device 5 placed outside the casing 2, and a piston 3 in phase Connect the displacement sensor 31 for detecting the displacement of the piston, the pressure sensor 33 arranged at the front of the piston 3 for detecting the pressure on the piston, and the sensor connected to the magnetic field generator 5, the displacement sensor 31 and the pressure sensor 33 through the data connection line 34 The controller 32 can control the eddy current damping force received by the piston 3 by changing the magnetic field strength of the magnetic field generating device 5, so as to realize the active adjustment of the impedance of the refrigerator.

[0060] Wherein, the shell is made of non-ferromagnetic material, and various materials meeting requirements can be use...

Embodiment 2

[0080] Such as image 3 Shown: A pulse tube refrigerator with an active phasing device for refrigerator impedance based on eddy current damping includes: a compression device 8, a heat exchanger at the hot end of the regenerator 9, a regenerator 10, and a heat exchanger at the cold end 11, The pulse tube 12 , the heat exchanger 13 at the hot end of the pulse tube, and the phase modulation device 26 , the phase modulation device 26 is the active phase modulation device 1 of refrigerator impedance based on eddy current damping described in Embodiment 1.

[0081] The above-mentioned components are connected as follows: the compression device 8 is sequentially connected to the heat exchanger 9 at the hot end of the regenerator, the regenerator 10, the heat exchanger 11 at the cold end, the pulse tube 12, and the heat exchanger 13 at the hot end of the regenerator through pipelines. and the phase modulating device 26; the regenerator 10 and the vessel 12 can be arranged in a U-shap...

Embodiment 3

[0087] Such as Figure 4 Shown: a multi-stage pulse tube refrigerator with an active phasing device for refrigerator impedance based on eddy current damping includes: a compression device 8, a heat exchanger at the hot end of the regenerator 9, a first-stage regenerator 14, The first-stage cold-end heat exchanger 15, the first-stage pulse tube 16, the first-stage pulse tube hot-end heat exchanger 17, the first-stage phasing device 27, the second-stage regenerator 18, and the second-stage cold end The heat exchanger 19, the second-stage pulse tube 20, the second-stage pulse tube hot-end heat exchanger 21, and the second-stage phasing device 28, the first-stage phasing device 27 and the second-stage phasing device 28 At least one of them is the active phasing device 1 for refrigerator impedance based on eddy current damping described in Embodiment 1, and of course both of them can adopt the active phasing device 1 for refrigerator impedance based on eddy current damping describe...

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Abstract

The invention discloses an eddy-current-damping-based refrigerator impedance phase modulation device. The refrigerator impedance phase modulation device can be used for phase modulation of a pulse tube refrigerator and comprises a shell, a piston and a magnetic field generator. The shell can communicate with a pulse tube hot end heat exchanger of the pulse tube refrigerator in a sealed mode. The piston is arranged in the shell through an elastic part, can do reciprocating motion under the action of pressure waves and is a conductor. The magnetic field generator is arranged outside the shell and can generate magnetic field acting force on the piston when the piston reciprocates. According to the phase modulation device, eddy current damping force is introduced to participate in impedance modulation, the magnitude of the eddy current damping force can be controlled by changing magnetic field intensity of the magnetic field generator, meanwhile the operation is matched with selection of the piston area and spring stiffness to provide optimal impedance for the pulse tube refrigerator, and thus the pulse tube refrigerator can work efficiently.

Description

technical field [0001] The invention belongs to the field of cryogenic refrigerators, and in particular relates to a refrigerator impedance phase modulation device based on electric eddy current damping, a pulse tube refrigerator using the phase modulation device, and a phase modulation method. Background technique [0002] The pulse tube refrigerator was first proposed by Gifford and Longsworth in 1963. Its most important feature is that the cold head has no moving parts, and has the advantages of long life, low cost, stability and reliability, and is very suitable for the cooling of space superconducting devices and infrared equipment. . A pulse tube refrigerator usually consists of a compression device, an after-stage cooler, a regenerator, a cold-end heat exchanger, a pulse tube, a hot-end heat exchanger, and a phase adjustment device. Among them, the acoustic impedance of the cold end of the regenerator has a crucial influence on the refrigeration performance of the pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/14
CPCF25B9/14
Inventor 郭永祥王博赵钦宇巢翊钧孔家煊张岳驰刘东立周文杰甘智华
Owner ZHEJIANG UNIV
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