关键词: 动力学特性, 仿真, 活塞型自力式三通阀

Abstract: Combined air-conditioner by heat pipe and compression applied in spaces requiring annual cooling has good energy saving potential. Three-port piston valve used for working mode switch of combined air-conditioner play an important role in running safely and reliably. A three-port piston valve applied for mode switch of combined air-conditioner by heat pipe and compression is introduced. Operating principle of three-port piston valve is elaborated. To simulate the dynamic characteristic of three-port piston valve，dynamic characteristic mathematics model of three-port piston valve is developed. The dynamic characteristic of switching mode is simulated, from comparison of simulation and test results：the simulation results and experimental results can be well identical, and the simulation model can be ensured to analyze the dynamic characteristic.

Key words: Dynamic characteristic, Simulation, Three-port piston valve