| 摘要 |
<p>PURPOSE:To reduce costs and as attachment space by integratedly constructing a flow synchronizing part which switches on/off a reed switch and a pressure synchronizing part which opens and closes an optical path between a light generating element and a light receiving element or a contact of a magnet and a reed switch. CONSTITUTION:A pressure synchronizing part (PS) and a flow synchronizing part (FS) are integradedly provided in a container unit which has a flow path in an inverted U-letter shape. A light generating element and a light receiving element 7, 8 of the pressure synchronizing part (PS) and a reed switch 13 of the flow part (FS) are connected in parallel. Then, as the pressure falls, a pressure receiving member of the pressure synchronizing part (PS) falls so that a light shielding part 4A leaves an optical path between the light generating element and the light receiving element 7, 8 to start the operation of a pump with light. If the quantity of the flow exceeds a certain value, water lifts a float 11 and a permanent magnet 12 approached to a reed switch 21 to keep its contact closed. Thus, the pump can be operated at a constant pressure in accordance with the flow in use.</p> |
