利用铁电晶体在不同电场下的ＴＳ图及热力学理论，提出了利用铁电晶体进行致冷的回热循环．考虑热阻不可逆性、循环过程的有限时间性以及回热不平衡性，建立了不可逆回热循环模型．针对回热不平衡的两种情况，应用有限时间热力学理论，对循环性能进行了优化分析与研究，为回热式铁电致冷器的研究设计提供了有意义的结论和理论依据 Using ferroelectric crystal in different electric field under TS diagram and thermodynamic theory, the use of ferroelectric crystals for cooling back to the heat cycle. Considering the irreversibility of thermal resistance, the limited timeliness of the cycle and the unbalance of regenerative heat, an irreversible thermal cycle model was established. According to the two cases of unbalanced heat recovery, the finite-time thermodynamic theory is applied to optimize the cycle performance and to provide a meaningful conclusion and theoretical basis for the research and design of the regenerative ferroelectric cooler