Linear low-temperature mechanical refrigerator

According to the linear low-temperature mechanical refrigerator, independent operation of a single-side cold finger and simultaneous operation of double-side cold fingers can be achieved by controlling a single-side motor of a single-backpressure-cavity double-gas-path opposed linear compressor, and the linear low-temperature mechanical refrigerator can be compact in structure through the arrangement that a compression cavity and a gas outlet pipeline are separated, pistons are symmetrically arranged and the like; and vibration of the compressor can be reduced, a passive vibration damper does not need to be added for vibration reduction, when only the motor on one side works, the cold finger on the other side and the compression cavity become the back pressure cavity, the volume of the back pressure cavity is further increased, and the phenomenon that the balance position of the piston deviates due to the gas force effect is avoided. 本发明涉及一种线性低温机械制冷机，通过控制单背压腔双气路对置式线性压缩机的单侧电机来可实现单侧冷指独立运行、双侧冷指同时运行，通过将压缩腔和出气管路分离