| 摘要 |
An aspirator structure to proportionately mix a pressurized motive liquid and non-pressurized additive liquid and to deliver the mixed liquids into a storage supply of mixed liquids. The aspirator structure includes an elongate aspirating chamber connected with the supplies of motive and additive liquids and has a discharge end from which the mixed liquids flow. The structure next includes an elongate, vertical delivery tube with a cylindrical inside surface, a closed upper end portion communicating with the discharge end of the chamber and an open lower end opening in the supply of mixed liquids. The cross-sectional extent of the tube is greater than the cross-sectional extent of the chamber and the liquids flowing from the chamber are directed substantially tangentially with respect to the inside surface of the tube so that those liquids establish a vortex flow with and are moved downwardly therethrough by the force of gravity. The tube has an elongate radially opening circumferentially and longitudinally extending anti-syphon slot opening pitch counter to the vortex flow of liquids whereby those liquids flow substantially laterally across the opening within the tube.
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