本文对吸收式热泵的降膜吸收过程中动量、能量及质量传递进行了较全面的理论分析，建立了变膜厚降膜吸收数学模型，揭示了吸收过程中热量、动量、质量传递过程间的相互作用关系并提出以ＰＥ数为核心的凝结式降膜吸收理论。依据该理论，成功地对降膜吸收过程传热实验数据进行关联，获得了实用传热计算的无因次准则公式。 In this paper, a more comprehensive theoretical analysis of the momentum, energy and mass transfer in the absorption process of the absorption heat pump has been carried out. The mathematical model of the absorption of the thickening falling film has been set up and the correlations between the heat, momentum and mass transfer during the absorption process have been revealed The interaction between the PE film and the condensation of the falling film absorption theory. According to this theory, the heat transfer experimental data of falling film absorption process were successfully correlated, and the formula of dimensionless criterion for practical heat transfer calculation was obtained.