Anti-blockage dirt discharging device

The invention discloses an anti-blockage dirt discharging device. A cavity is included. The outer portion of the cavity is provided with a dirt suction pipe, a dirt suction left auxiliary pipe, a dirtsuction right auxiliary pipe and a dirt suction connecting pipe. A piston moving up and down is arranged in the cavity. The top end of the piston extends to the outer portion of the cavity in a fixedconnection manner. The bottom end of the dirt suction pipe communicates with one end of the dirt suction left auxiliary pipe and one end of the dirt suction right auxiliary pipe. The other end of thedirt suction left auxiliary pipe communicates with the lower portion of the cavity, and the other end of the dirt suction right auxiliary pipe communicates with the upper portion of the cavity. The two ends of the dirt suction connecting pipe communicate with the upper portion and the lower portion of the cavity correspondingly. A dirt discharging pipe is arranged below the cavity, and the bottomof the cavity communicates