| 摘要 |
PROBLEM TO BE SOLVED: To provide a suction system capable of avoiding failure of a suction device while reducing the manufacturing cost.SOLUTION: A suction system includes: pipes P1, P1a and P1b for connecting vacuum pumps 2a and 2b to a suction target; a pipe P2a connected to a check valve CV2 disposed in the pipe P1b and a discharge port of the vacuum pump 2a; a check valve CV3 provided in the pipe P2a and allowing movement of air flowing from an end on the vacuum pump 2a side to the outside of the pipe P2a and regulating movement of air flowing from the outside of the pipe P2a to the end on the vacuum pump 2a side; a pipe P3 having one end connected between the end on the vacuum pump 2a side in the pipe P2a and an arrangement portion of the check valve CV3 and the other end connected between an end on the vacuum pump 2b side in the pipe P1b and an arrangement portion of the check valve CV2; and a solenoid valve SV1 disposed in the pipe P3. The vacuum pumps 2a and 2b can be switched between a parallel connection state and a series connection state. |
