RAW MATERIAL SELLOUT DETECTING DEVICE OF AUTOMATIC BEVERAGE VENDING MACHINE

摘要

PURPOSE: To provide a liquid raw material sellout detecting device of the automatic beverage vending machine which can accurately detect the sellout state of a raw material stored in a raw material tank irrelevantly to the kind and properties of the liquid raw material. ;CONSTITUTION: The raw material tank 1 which contains the liquid raw material 2 is equipped with a couple of detection electrodes 17 and 18 opposite each other halfway on a piping hose 6 between an attached suction pipe 3 and a liquid feeding pump 4 and a sellout detecting circuit 10 monitors variation in the impedance value between the electrodes to detect the raw material sellout state; and a raw material liquid reservoir part 1a of small opening area into which the tip of the suction pipe 3 is inserted is provided at the bottom part of the raw material tank 1 to suppress the bubbling of the raw material and the tips of the detection electrodes 17 and 18a are fitted protruding into a liquid passage through a water-repellent base material 19 to prevent a liquid film from sticking and remaining at the peripheries of the electrodes.;COPYRIGHT: (C)1994,JPO&Japio