| 摘要 |
<p>PURPOSE:To always avoid the entry of the air into a drink supply pipe and permit the detection of the out-of-stock of a drink in a bag without flowing electric current through the drink by actuating a drink out-of-stock switch through the displacement of an actuator caused by an increase in vacuum in a pump pressure chamber resulting from the depletion of the drink in the bag. CONSTITUTION:At the time of suction by a pump 7, a drink in a bag 1 is reduced to the minimum limit of the inner volume thereof to form great degree of vacuum in a pressure chamber 11. This moves an actuator 16 in the direction of the arrow C deflecting a spring 19 to move the end part 16b thereof apart from the operating rod of a drink out-of-stock switch 18 for opening the contact point, thereby deenergizing a pump motor 8 and, at the same time, turning on a lamp for indicating depletion of the drink. Therefore, there is no air intrusion into a pipe 5 through which the drink is passing and it can be detected when the bag 1 is running out of the drink.</p> |
