Small-hole type pulse tube thermoacoustic refrigerator

Abstract

The invention relates to a small-hole type pulse tube thermoacoustic refrigerator, which includes a compressor, a hot-end heat exchanger, a regenerator and a cold-end heat exchanger. A compression cavity of the compressor, the hot-end heat exchanger, the regenerator and one end of the cold-end heat exchanger are connected in sequence, the other end of the cold-end heat exchanger is connected withone end of a resonant tube and one end of a pulse tube, the other end of the resonant tube is connected with a first gas reservoir, the other end of the pulse tube is connected with a second gas reservoir, and a small-hole valve is arranged between the pulse tube and the second gas reservoir. Compared with the prior art, according to the small-hole type pulse tube thermoacoustic refrigerator, low-temperature gas expanding for work is added through the pulse tube, and the small-hole valve at the hot-end of the pulse tube can adjust the refrigerating capacity; the resonant tube, under the low temperature, connected with the cold-end heat exchanger plays a phase-regulating role, and due to the low temperature, the acoustic work loss caused by viscous resistance and heat transfer is very small; and thus the efficiency of the thermoacoustic refrigerator can be improved through the structure of connecting the pulse tube and the small-hole valve to the cold-end heat exchanger of the thermoacoustic refrigerator.

Description

technical field [0001] The invention relates to a refrigerator, in particular to a small hole type pulse tube thermoacoustic refrigerator, which belongs to the field of refrigeration. Background technique [0002] A thermoacoustic refrigerator is a refrigeration device that uses the thermoacoustic effect to generate cooling capacity by consuming sound work. It consists of a pressure drive device, a heat exchanger at the hot end, a thermoacoustic plate stack, a heat exchanger at the low temperature end, a resonant tube, and a resonant ball. The principle is that the small air mass vibrates along its length in the thermoacoustic plate stack, and the gas undergoes adiabatic compression and expansion under the action of pressure, thus producing a temperature change. [0003] The principle of the small-hole valve-type pulse tube refrigerator is that the gas expands in the pulse tube to do work and cool down. The gas in the pulse tube can be divided into three parts, one part is...

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Problems solved by technology

[0004] The key idea of ​​the traditional standing wave thermoacoustic refrigerator is that part of the gas in the thermoacoustic pile undergoes adiabatic temperature oscillation. In the thermoacoustic pile, the phase angle of the pressure and the volume flow rate is 90°. Ideally, its The sound work generated is 0, and the pure standing wave does not transmit the sound work, and the refrigeration work is generated only by the incomplete heat exchange in the thermoacoustic plate stack, so the efficiency of the whole machine is low

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