| 摘要 |
<p>PURPOSE:To prevent a detection error caused by a foamed liquid by measuring the differential pressure between an entrance side and an exit side using a differential pressure sensor in a connecting line when a liquid passes through an orifice and detecting the running out of the liquid in a liquid pipeline by the change of the differential pressure. CONSTITUTION:An orifice 20 and a connecting line 23 to connect a hole part 21 and a hole part 22 of the inner wall of a sirup pipeline 10 in the neighborhood of the orifice 20 are provided for the sirup pipeline 10. Further, a differential pressure sensor 26 to measure the differential pressure between an entrance side 24 and an exit side 25 of the orifice 20 taken out from the connecting line 23 when a sirup liquid passes through the orifice 20 and detect the running out of the sirup liquid in the pipeline 10 by the change of the differential pressure is provided in the connecting line 23. Further, it is decided that the sirup liquid is run out when the differential pressure to be measured by the differential pressure sensor 26 after time from a point where a valve is opened to another point where a differential pressure value is to become a fixed value presses changes to another differential pressure value lower than the preceding differential value for a prescribed value or more by a point where the valve is opened. Thus, the detection error caused by the foaming of the liquid can be prevented.</p> |
