For the regenerator of a refrigerator, all gas parcels inside the regenerator work together and cooperate elegantly to pump heat from the cold end to the hot end of the regenerator at last.

• 对于制冷机来说，回热器内的微团通过接力作用，一步步将低温热源的热量向高温泵送，并最终排向环境温度热源。