Backward-inclined centrifugal fan dust exhaust device

The utility model relates to the technical field of centrifugal fans, in particular to a dust exhaust device of a backward-inclined centrifugal fan. A backward-inclined centrifugal fan dust exhaust device comprises a fan body and a dust exhaust device body, an air inlet pipe is arranged at one end of the fan body, the dust exhaust device body comprises a connecting frame, a cleaning assembly and a dust exhaust assembly, the cleaning assembly is in through connection with the dust exhaust assembly, the dust exhaust assembly is fixedly connected with the connecting frame, and the dust exhaust assembly is fixedly connected with the connecting frame. And the connecting frame is detachably connected with the air inlet pipe. The dust exhaust device is arranged on the air inlet pipe of the fan body, the cleaning plate is driven by the driving motor to rotate, dust on the air inlet filter screen is scraped, meanwhile, the negative pressure fan is connected to the cleaning plate, the scraped dust is sucked out in time