Cascading-type pulse tube refrigerator capable of recycling sound power

Abstract

The invention discloses a cascading-type pulse tube refrigerator capable of recycling sound power. The cascading-type pulse tube refrigerator comprises a master grade pulse tube refrigerator unit, a conveying tube, an auxiliary grade pulse tube refrigerator unit and a heat bridge, wherein the master grade pulse tube refrigerator unit, the conveying tube, the auxiliary grade pulse tube refrigerator unit and the heat bridge are sequentially connected. An auxiliary grade rear cooler of the auxiliary grade pulse tube refrigerator unit and a master grade hot end heat exchanger of the master grade pulse tube refrigerator unit are connected through the conveying tube so as to recycle the sound power. According to the cascading-type pulse tube refrigerator capable of recycling the sound power, an auxiliary grade cold end heat exchanger of the auxiliary grade pulse tube refrigerator unit is connected with a master grade heat regenerator of the master grade pulse tube refrigerator unit through the heat bridge, and the extra refrigerating capacity obtained by the recycled sound power is used for precooling a certain portion of the master grade heat regenerator so as to reduce the temperature of a working medium of the master grade pulse tube refrigerator unit; compared with a traditional pulse tube refrigerator, efficiency of the cascading-type pulse tube refrigerator can be remarkably improved; the cascading-type pulse tube refrigerator has good application prospects on the occasion where the large refrigerating capacity, the high efficiency and the long service life are required.

Description

Technical field [0001] The invention relates to a pulse tube refrigerator, in particular to a cascade type pulse tube refrigerator for recovering sound power. Background technique [0002] The pulse tube refrigerator was first proposed by Professor Gifford and Longswoth in the United States. Because it has no moving parts at low temperatures, it avoids sliding seals, mechanical wear and other problems, and is expected to become a low-cost, low-vibration, high-reliability, and long-life low-temperature Refrigerators are widely used. With the introduction and successful application of phase modulation structures such as small-hole air storage, two-way air intake, and inertial tube, the cooling temperature of the pulse tube refrigerator is continuously reduced, and the cooling capacity and cooling efficiency are also greatly improved, close to or even under certain working conditions. Exceeding the traditional regenerative cryogenic refrigerators (such as: GM refrigerators, Stirlin...

AI Technical Summary

Problems solved by technology

In the thermally coupled two-stage pulse tube refrigerator in the existing invention, in order to obtain better performance of the first-stage pulse tube refrigerator, the second-stage pulse tube refrigerator is used to precool the return of the first-stage pulse tube refrigerator. Although this structure can reduce the minimum temperature that the first-stage pulse tube refrigerator can reach and improve the performance of the first-stage pulse tube refrigerator, the two-stage pulse tube refrigerator requires two compressor units , and their respective sound powers are dissipated in their corresponding phase-modulating components (inertial tubes, gas reservoirs), so the efficiency of the whole machine is relatively low, which cannot effectively save energy consumption and improve efficiency

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