Pulse tube refrigerator with low-temperature cavity structure

A pulse tube refrigerator and cavity structure technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of large regenerator loss, low refrigeration efficiency, and large acoustic power at the inlet of the inertial tube.

Pending Publication Date: 2021-07-06
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inertia tube-gas storage type and small hole-gas storage type phasing mechanisms are widely used in pulse tube refrigerators. Inertia tube-gas storage type phasing mechanisms use the inertia of gas oscillation to perform phase modulation, but deep cryogenic pulse tube refrigerators When the inertial tube at nor...

Method used

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  • Pulse tube refrigerator with low-temperature cavity structure
  • Pulse tube refrigerator with low-temperature cavity structure
  • Pulse tube refrigerator with low-temperature cavity structure

Examples

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] combine figure 1 As shown, this embodiment provides a pulse tube refrigerator with a low-temperature cavity structure, including a pulse tube refrigerator cold finger 1, an annular drive mechanism 2, a vibration-reduction phase-modulation mechanism 3, a low-temperature cavity, and a data acquisition and control mechanism 5 . Among them, the cold finger 1 of the pulse tube refrigerator includes a cold end 1-1, a regenerator 1-2, a pulse tube 1-3 and a hot end 1-4, and the annular drive mechanism 2 includes an annular piston 2-1 and a compression chamber 2-2 , an annular piston support mechanism 2-3 and an annular piston drive mechanism 2-4, the vibration damping phase modulation mechanism 3 includes a linear low temperature inertia tube 3-1, a vibration damping phase modulation piston 3-2, an orifice valve 3-3, a vibration damping The...

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Abstract

The invention discloses a pulse tube refrigerator with a low-temperature cavity structure, comprising a pulse tube refrigerator cold finger, an annular driving mechanism, a vibration reduction and phase modulation mechanism, a low-temperature cavity, and a data acquisition and control mechanism. The low-temperature cavity is connected with a hot end of the pulse tube refrigerator cold finger and located in a low-temperature environment; the low-temperature cavity, a linear low-temperature inertia tube and a pulse tube cold finger are coaxially arranged; a middle hole is formed in an annular piston in the axis direction; the linear low-temperature inertia tube is connected with a pulse tube and an air reservoir through the middle hole; a small hole valve is located in the linear inertia tube; and the data acquisition and control mechanism measures and acquires the phase of the annular piston and controls the vibration reduction and phase modulation piston to move. The phase difference between a pressure wave and mass flow in the refrigerator can be accurately adjusted by changing the length and diameter of the low-temperature linear inertia tube or the diameter of a small hole, the refrigerating capacity and the refrigerating efficiency of the pulse tube refrigerator are optimized, and high-efficiency refrigeration in a deep low-temperature area can be achieved through a single-stage pulse tube.

Description

technical field [0001] The invention belongs to the field of small low-temperature refrigerators, and in particular relates to a pulse tube refrigerator with a low-temperature chamber structure. Background technique [0002] Cryogenic refrigerators are widely used in deep space exploration, superconducting technology and other fields. Pulse tube refrigerators are an important branch of cryogenic refrigerators and have important academic research and application value. [0003] There are no moving parts at the cold end of the pulse tube refrigerator, and the relationship between the mass flow and the pressure wave in the refrigerator needs to be adjusted by a phase modulation mechanism. According to the enthalpy flow phase modulation theory, when the mass flow in the middle of the regenerator of the pulse tube refrigerator is in the same phase as the pressure wave, the efficiency of the refrigerator is the highest. The characteristics of the phase modulation mechanism determ...

Claims

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Application Information

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IPC IPC(8): F25B9/14F25B40/06F25B49/00
CPCF25B9/145F25B40/06F25B49/00
Inventor 刘少帅吴亦农惠贺军蒋珍华丁磊黄政陈钏曲晓萍杨宝玉陆志项汉桢宋键镗
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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