| 摘要 |
A method for producing a vacuum, which includes feeding an ejecting vaporous medium into the gas ejector, evacuating an ejected gaseous medium by the ejecting vaporous medium, mixing of the vaporous and gaseous mediums and forming a mixture of the two, evacuating this mixture by a liquid-gas ejector whose nozzle is fed by a liquid ejecting medium, condensing the vaporous ejecting medium and its dissolving in the liquid ejecting medium in the liquid-gas ejector, forming a liquid-gas mixture and subsequent separating the liquid-gas mixture into compressed gas and a liquid phase which is used further as the liquid ejecting medium of the liquid-gas ejector. Substances which are reciprocally soluble in each other or mixtures of such substances are used as the vaporous and liquid ejecting mediums. A pumping-ejection system implementing the method includes a gas ejector, a liquid-gas ejector, a pump, a separator, a pressure pipeline and a vaporizing device for transforming a portion of the liquid ejecting medium into the vaporous state. An outlet of the vaporizing device is connected to the gas ejector, length of the pressure pipeline represents from 0.2 to 400 times that of its diameter. The introduced method and related pumping-ejection system exhibit an increased efficiency.
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