从制冷系统热动力学观点出发，在分布参数的基础上建立了一个房间空调器的稳态模拟模型，分析了换热器的两相流特性及分布，并且针对每一种流态提出相应的热交换关系式。换热器模型基于两相流分析，在质量、动量、能量三大守恒方程基础上引入一个反映两相之间相互关系的关联式以使方程可解。实验表明，与计算机模拟结果吻合较好，与均相流模型相比，精度有所提高。 Based on the distribution parameters, a steady-state simulation model of room air conditioner is established, the characteristics and distribution of the two-phase flow in the heat exchanger are analyzed, and the corresponding Heat exchange relations. Based on the two-phase flow analysis, the heat exchanger model is based on the three conservation equations of mass, momentum and energy, and a correlation formula reflecting the interrelation between the two phases is introduced to make the equation solvable. Experiments show that the simulation results are in good agreement with those of the computer simulation. Compared with the homogeneous flow model, the accuracy is improved.