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为了解决制冷机实验中线性压缩机与冷指不匹配的问题,本文以热声学理论为基础,对线性压缩机与冷指的匹配规律探索研究。基于压缩活塞的运动控制微分方程、电机的电压平衡方程和整机的阻抗特性,研究压缩机电机效率和PV功转化效率的影响因素和提高方法。在匹配原理的指导下,对一台双磁钢动磁式线性压缩机驱动的气动分置式斯特林制冷机进行优化分析,优化后,制冷机获得6 W/80 K制冷性能所需的电功从163.5 W降低到86.8 W,压缩机的电机效率从68.6%提高到79.6%。
In order to solve the problem that the linear compressor does not match with the cold finger in the experiment of the refrigerator, the paper studies the matching rule of the linear compressor and the cold finger based on the thermoacoustic theory. Based on the differential equations of motion control of the compression piston, the voltage balance equation of the motor and the impedance characteristics of the complete machine, the influencing factors and improving methods of compressor motor efficiency and PV power conversion efficiency are studied. Under the guidance of the matching principle, the optimization of the aerodynamic split-type Stirling chiller driven by a dual-magnet linear compressor is optimized. After the chiller obtains the electricity required by the 6 W / 80 K refrigeration performance Work decreased from 163.5 W to 86.8 W, compressor motor efficiency increased from 68.6% to 79.6%.