Centrifugal pipeline fan

The utility model discloses a centrifugal pipeline fan, and particularly relates to the technical field of pipeline fans, the centrifugal pipeline fan comprises a fan shell and a motor, the motor is fixed at the rear end of the fan shell, the front end of an output shaft of the motor penetrates through the fan shell, is fixed with the rear end of an impeller in the fan shell and is used for driving the impeller to rotate, and an air inlet is formed in the front end of the fan shell. An air inlet is formed in one side of the fan shell, an air outlet is formed in one side of the fan shell, a filter assembly is arranged on the outer wall of the air inlet and comprises a circular plate, a plurality of through holes are formed in the front end of the circular plate, and a filter screen is fixedly arranged in each through hole. External air is filtered through the filter screens, dust and impurities in the external air are prevented from polluting the interior of the fan shell, meanwhile, the motor drives the clean