Efficient and energy-saving double-cold-source fresh air ventilator device

The utility model relates to the technical field of fans, in particular to an efficient and energy-saving double-cold-source fresh air fan device which comprises a fan body, a fresh air opening formed in the bottom end surface of the left side of the fan body, an air supply opening formed in the side, away from the fresh air opening, of the bottom end surface of the fan body, an air return opening formed in the top end of the air supply opening, and an air exhaust opening formed in the top end of the fresh air opening. A first filter plate is arranged in the bottom end of the fan body, a mounting plate is arranged on the side, away from the fresh air opening, of the first filter plate, and a first open groove is formed in the mounting plate. The anti-skid block is rotated to drive the rotating shaft and the first bevel gear to rotate and drive the lead screw to rotate, the lifting plate can slide up and down along the lead screw and drive the insertion block to move up and down, when the insertion block stret