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内泄漏量是衡量四通换向阀性能的重要指标之一．本文建立了四通换向阀的气体试验中的泄漏模型，并通过试验方法研究了压差、气体温度对泄漏量的影响．理论和试验结果表明，在同一个换向阀上，压差的增加会明显地增加泄漏量，而气体温度的上升会使泄漏量降低．
Internal leakage is a measure of the performance of four-way valve one of the important indicators. In this paper, the leakage model of four-way reversing valve gas test was established and the effect of pressure difference and gas temperature on the leakage rate was studied through the test method. Theoretical and experimental results show that with the same reversing valve, an increase in pressure differential can significantly increase the amount of leakage and a rise in gas temperature decreases the amount of leakage.