Pulse tube refrigerator adopting novel phase modulating mechanism

Abstract

The invention discloses a pulse tube refrigerator adopting a liquid phase modulating device. The pulse tube refrigerator comprises a compressor, an after-cooler, a heat regenerator, a cold-end heat exchanger, a pulse tube, a heat-end heat exchanger, a phase modulating mechanism and an air reservoir, wherein the phase modulating mechanism comprises a U-shaped tube and liquid existing in the U-shaped tube; one end of the U-shaped tube is connected with the cold-end heat exchanger while the other end of the U-shaped tube is communicated with the air reservoir; the liquid at the bottom of the U-shaped tube is used for modulating the phase for the pulse tube refrigerator; the phase modulating capacity is enhanced; the tube length of a liquid phase modulating device with same phase modulating capacity is shorter than the tube length of a traditional inertia tube; the phase modulating amplitude is higher than that of the traditional inertia tube; the liquid phase modulating device is adopted for the pulse tube refrigerator, so that the phase angle between the pressure wave and the mass flow is close to 90 degrees; the adjusting capability is improved; the efficiency of the pulse tube refrigerator can be more effectively increased.

Description

technical field [0001] The invention relates to the technical field of low temperature refrigeration, in particular to a pulse tube refrigerator using a liquid phase modulation device. Background technique [0002] Since the appearance of the pulse tube refrigerator in the 1960s, due to its simple structure, no moving parts at low temperature, small mechanical vibration, reliable operation, and long life, it has attracted widespread attention and has become a research hotspot in the field of refrigerators. However, compared with Stirling refrigerators and G-M refrigerators, due to the unsatisfactory phase match between the mass flow and pressure waves at the cold end, the refrigeration efficiency is low. [0003] The rapid development of aerospace, space exploration, infrared, atomic energy, superconductivity and other technologies has promoted the continuous development and progress of cryogenic refrigeration technology. As an important branch of cryogenic technology, the ...

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Problems solved by technology

[0008] The disadvantage of this invention is that although it improves the space utilization rate and saves the volume, the phase modulation mechanism is too complicated and requires high requirements for the design and processing process when it is actually used, which is not conducive to popularization

And it is still an inertial tube gas storage phase modulation mechanism in essence, and there will still be a problem of insufficient phase modulation capability

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