| 摘要 |
PURPOSE:To prevent noise from occurring and to keep the capacity of highly pressurized tank to be minimum, by connecting a discharge pipe to an air storage tank as an air reclaiming pipe in order to return the air stored and compressed in the tank to a highly pressurized air tank. CONSTITUTION:The interior of a pressure adjuster 2 is divided into two, namely an air room 11 and external water introduction room 12, and the room 11 communicates with the interior of a wave transmitter 1 as a speaker through an inside atmospheric pressure communicating tube 7. When radiating sound wave, a magnetic valve 9 is opened so that compressed air out of a highly pressurized air tank 3 extends a diaphragm 4 until it is detected by a setting position detection sensor 14. If the adjuster 2 becomes shallow and the diaphragm 4 is detected by a lower limit position detection sensor 15, a magnetic valve 10 becomes to be open to store the air in an air storage tank 16. If the pressure in the tank 16 becomes a set value, the air is reclaimed in the tank 3 with highly pressurized state through a pump 18. |
