Automatic flushing device for filter

The utility model discloses an automatic flushing device for a filter, which comprises a collecting tank, a filter cartridge, a rotary cleaning brush and a turbulent flow stop block, and a liquid inlet and a liquid outlet are arranged on the peripheral wall of the collecting tank; the filter cartridge is arranged in the collecting tank and shields the liquid outlet, an inclined opening is formed in the upper end of the filter cartridge, and the opening is opposite to the liquid inlet, so that liquid flowing in from the liquid inlet enters the filter cartridge after passing through the opening, and is discharged from the liquid outlet after being filtered by the filter cartridge; the rotary cleaning brush is coaxially arranged in the filter cartridge, and the rotary cleaning brush can pivot along the axis of the rotary cleaning brush; the turbulent flow stop block is arranged in the liquid inlet and is configured to change the flowing direction of the liquid when the liquid passes through the liquid inlet, so