Apparatus reponsive to pressure of a medium which effects fluid discharge for controlling the pressure of the medium and the time the medium acts on the fluid

摘要

A quantitative fluid discharge device includes an arrangement for pressurizing fluid within a container and discharging the fluid from the container at a predetermined rate. A dispense control apparatus is provided for controlling the rate of fluid discharge from the container. The dispense control apparatus includes a keyboard from which signals for effecting initialization and discharge may be input, and a microcomputer for receiving those signals from the keyboard. An interface receives a digital pressure command signal from the microcomputer, and an electropneumatic regulator receives an analog pressure command signal from this interface. The electropneumatic regulator includes an air channel, and a solenoid valve is disposed in a middle part of this air channel. A pressure sensor for detecting the discharge air pressure acting on the fluid is disposed at a location which permits detection of the discharge air pressure while the fluid is being discharged from the container.