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中文摘要：
热管/蒸汽压缩复合空调机组应用于全年需冷空间时具有很好的节能效果,用于热管和制冷模式切换阀件对其可靠、节能运行起着至关重要的作用。提出适用于热管/蒸汽压缩复合空调机组模式切换的活塞型自力式三通阀的结构;根据其工作原理建立数学模型,对阀门切换时的动力学特性进行仿真研究,并建立活塞型自力式三通阀性能测试试验台对仿真结果进行验证;仿真和试验结果吻合较好,表明所建模型能够较好地分析其模式切换时的动力学特性。
英文摘要：
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.
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