| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drainage device and a drainage system that can suppress noise and piping vibration generated when sucking sewage. <P>SOLUTION: A drainage device includes: a first valve device 15 that communicates and blocks between its inflow port of sewage W connected to a suction pipe 31 and its outflow port by a change in operating negative pressure P; a negative pressure drainage pipe 32 that is connected to the outflow port and maintained in a negative pressure state; and an operating negative pressure control part 16 that changes the operating negative pressure P. The operating negative pressure control part 16 comprises: an operating negative pressure pipe 44 which is connected to the negative pressure drainage pipe 32 and into which the sewage W cannot be flow; a second valve device 41 that communicates and blocks between the operating negative pressure pipe 44 and the first valve device 15 to change the operating negative pressure P of the first valve device 15; a toilet bowl tank switch 23 that instructs the second valve device 41 to communicate between the operating negative pressure pipe 44 and the first valve device 15; and a timer 42 that instructs the second valve device 41 to block between the operating negative pressure pipe 44 and the first valve device 15 when the liquid level of the sewage W in a toilet bowl body 21 is located above the end of the suction pipe 31. <P>COPYRIGHT: (C)2013,JPO&INPIT |
