热声制冷机由于结构简单、无运动部件,具有广阔的应用前景。本文在已有的小型行波热声发动机的基础上,开展了热声制冷的工作。利用线性热声理论对制冷机进行数值模拟,并对制冷机的各热声元件优化。优化后,系统整体装配横向尺寸仅0.5 m,在充气压力3 MPa,发动机输入功率384 W的条件下,达到了80 K的无负载温度。由于本制冷机由行波型热声发动机驱动,并且是通过线性热声理论优化,因此称之为小型行波低温热声制冷机。 Thermoacoustic refrigerator as a simple structure, no moving parts, has broad application prospects. In this paper, based on the existing small traveling-wave thermoacoustic engine, thermoacoustic refrigeration is carried out. The linear thermoacoustic theory is used to simulate the refrigerator and optimize the thermoacoustic components of the refrigerator. After optimization, the system overall assembly lateral dimension is only 0.5 m, and reaches an unloaded temperature of 80 K at an inflation pressure of 3 MPa and an engine input power of 384 W. Because this refrigerator is driven by a traveling-wave thermoacoustic engine and is optimized by the linear thermoacoustic theory, it is called a small traveling-wave low-temperature thermoacoustic refrigerator.