Dust-free fresh air device

The utility model relates to the technical field of fresh air devices, in particular to a dust-free fresh air device which is characterized in that a rubber sealing frame is erected, the bottom end of the rubber sealing frame is attached to a window frame, then the rubber sealing frame is adsorbed to the window frame through a plurality of sets of suction cups, a window is closed, the top end of the rubber sealing frame is extruded by the window, and the rubber sealing frame is tightly attached to the window frame. The window is fixed to the top end of the rubber sealing frame through multiple sets of locking devices, the right ends of the air inlet pipe and the air outlet pipe are both located outdoors, then outdoor air is discharged into a room through the air supply device, indoor air is discharged out of the room, meanwhile, the air entering the room is heated through the heat exchange device, loss of indoor heat is reduced, and the heat exchange efficiency is improved. The practicability of the equipment