| 摘要 |
1,213,327. Discharging liquids by gaseous pressure. HAWKER SIDDELEY DYNAMICS Ltd. May 2, 1969 [May 9, 1968], No. 16977/68. Heading F1R. In apparatus in which a readily evaporable liquid is transferred to a container 6 from a first container 2 under gaseous pressure supplied through pipes 4, 4<SP>1</SP> whereby equipment in close proximity to the apparatus is cooled by evaporation of the liquid, the increase in gaseous pressure in a control tube 7 caused by the liquid level in the container 6 rising above the open end 9 of tube 7 operates a valve 11 to release pressure from container 2 by venting gas through pipes 4, 4<SP>1</SP>. A fluid logic system is described in which the pressure in the control tube is applied as an input control signal to a pure fluid amplifier, the output of which controls the venting of gas from the first container, and a pressure take-off between the pipes connecting the first two containers may be fed through a restrictor to the fluid amplifier to limit the pressure in the first container. The working gas may be the vapour of the liquid in the first container and the tube 7 may contain an absorbent material so that the cycling time of the apparatus may be lengthened. |
