In order to minimize oil vapor migration, some lyophilizers are designed with a tortuous path between the vacuum pump and chamber.

为了最小化油蒸汽的回流，一些冻干机在真空泵和前箱间设计了弯曲的管路。

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This paper introduces the vapor recovery equipment, theory of the vacuum pump and problems of its installation and debugging in general.

简要介绍了济南分公司油气回收装置、 真空泵的工作原理以及安装与调试应注意的问题。

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With the assumption of the water vapor resulted from the vacuum cooling to be ideal gas, the energy consumptions of the catcher and the vacuum pump needed in cooling were calculated, respectively.

通过对预冷过程中水蒸汽为理想气体的假定，分别计算了捕水器和真空泵在匹配时所需要的能耗。

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