| 摘要 |
<p>PURPOSE: To eliminate a risk that bubbles rise into a pressure detecting section by forming a first section communicated with a pressure sensing means and a second section communicated with an open air in an upper part of a compartment and forming an entrance and exit between both sections. CONSTITUTION: Water to be poured into a treatment chamber 14 through a hose 19 flows in a tank 17 and when the level of water in the tank 17 reaches a hose 20, water passes the hose 20 and an entrance and exit 42 and flows into a leveling container 21. Then, in the case the levels of water in the tank 17 and the treatment chamber 14 continuously rise, the surface of water reaches a lower part of a partitioning wall 45 and air escapes through a section 27. After that, when addition water enters a container 21, the level of the water in the section 27 rises at the same ratio as that of the water in a treatment chamber 14 and at the same time air is evacuated through an aperture of the section 27. On the other hand, the air on the surface of water in a section 26 is compressed and the increased pressure is detected by a pressure detector 23, an electric circuit 24 is driven, and water flow to the container 21 is shut. Moreover, at the time when water is discharged to sewage from the treatment chamber 14, water is made to inversely flow to the tank 17 through the entrance and exit.</p> |
