Range hood with lifting function

The range hood with the lifting function comprises a range hood body and a contraction pipe, the range hood body comprises a working bin and a suction bin, a supporting seat is arranged behind the suction bin, a servo motor is fixedly installed on the front end face of the vertical end of the supporting seat, and the servo motor is fixedly connected with the supporting seat. And the output end ofthe servo motor is rotationally connected with a rotating screw rod, and the outer surface wall of the rotating screw rod is connected with a connecting block fixedly connected with the rear end faceof the working bin in a screwed mode through threads. According to the range hood, the servo motor is controlled to work, the servo motor drives the rotating screw rod to rotate, the rotating screw rod drives the range hood body to move through the external threads and the connecting block, meanwhile, the sliding block on the rear end face of the working bin and the vertically-arranged sliding rodcan slide at the same time