| 摘要 |
A sealing structure, a fluid treatment unit, a fluid treatment device and a manual switching mechanism therefor are provided. The sealing structure includes a cylinder, a sealing cover (31) and a support cover (32). The fluid treatment unit includes a chamber and guide plates. The manual switching mechanism includes a valve core (22) which is able to be manually operated. The valve core (22) is provided on the side of the treatment device main body, and is able to be manually operated so as to be located at two or more different positions which comprise a treatment position and a backwash position. The valve core (22) is connected to an inlet (17) and an intake passage (11) for fluid to be treated and blocks a backwash fluid discharge passage when the valve core (22) is located at the treatment position; the valve core (22) is connected to the inlet (17) and the backwash fluid intake passage so that the backwash fluid discharge passage is communicated with an outside of the fluid treatment device when the valve core (22) is located at the backwash position. |
