Piston work-recovery type pulse tube refrigeration system

Abstract

The invention discloses a piston work-recovery type pulse tube refrigeration system. The piston work-recovery type pulse tube refrigeration system comprises a room temperature end heat exchanger, a heat accumulator, a cold end heat exchanger, a pulse tube, a hot end heat exchanger, a discharger, a thermo-acoustic nucleus cooler, a thermo-acoustic nucleus heater and the like, wherein the room temperature end heat exchanger, the heat accumulator, the cold end heat exchanger, the pulse tube and the hot end heat exchanger are connected in sequence. The hot end heat exchanger is connected with one end of the discharger through a pipeline. After being connected with a plurality of thermo-acoustic nucleuses in sequence, the other end of the discharger is connected with the room temperature end heat exchanger through a feedback circuit. The thermo-acoustic nucleuses are formed by the sequential connection of the thermo-acoustic nucleus cooler, the heat accumulator and the thermo-acoustic nucleus heater. Compared with a traditional pulse tube refrigerating machine, the piston work-recovery type pulse tube refrigeration system is compact in structure, flexible and accurate in phase modulation and capable of recycling and amplifying acoustic power of the traditional pulse tube refrigerating machine used for the phase modulation, reducing external input acoustic power, obtaining cooling capacity and simultaneously enabling the whole piston work-recovery type pulse tube refrigeration system to run effectively.

Description

technical field [0001] The invention relates to the fields of cryogenic refrigerators and thermoacoustics, in particular to a piston work recovery type pulse tube refrigeration system. Background technique [0002] The pulse tube refrigerator was invented by Gifford and Longsworth in the United States in the 1960s. The pulse tube refrigerator is a kind of regenerative cryogenic refrigerator, which is composed of a regenerator, a pulse tube, a hot-end heat exchanger, a cold-end heat exchanger, and a phase adjustment device, because it eliminates the motion at low temperature Components, the maintenance-free running time is greatly extended, so it has a very wide application prospect in aerospace, military and other aspects. Pulse tube refrigerators are divided into basic pulse tube refrigerators and phase modulation pulse tube refrigerators. Tube type pulse tube refrigerator, two-way inlet type pulse tube refrigerator and other types. [0003] In the basic pulse tube refri...

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Problems solved by technology

[0004] Although the phasing device will improve the phase between the pressure and the volume flow rate, it will cause a part of the sound power loss in the phasing device, and the sound power entering the system will not be fully utilized. It is for this reason that the non-acoustic power recovery type The cycle efficiency limit of the pulse tube refrigerator is T C / T H , lower than the Carnot cycle efficiency T C / (T H -T C ), for high-power pulse tube refrigerators, the loss of sound work is huge

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