Simple electric switch air exhaust and supplement device special for kitchens and baths

The utility model discloses a simple electric switch air exhaust and supplement device special for kitchens and baths. The air volume adjusting device comprises a frame, a filter screen and an air volume adjuster, the frame is arranged on a reserved opening of a wall, an inner decorative panel is arranged on the face, located indoors, of the frame, an outer decorative panel is arranged on the face, located outdoors, of the frame, and the outer decorative panel is attached to the wall and connected with the frame in a bell-and-spigot joint mode. The frame is sequentially provided with an air inlet, a filter screen and an air volume adjuster from outside to inside, and the air volume adjuster can adjust the air inlet volume through rotation of the motor. According to the utility model, filtered air can be supplemented under the condition that a window is not opened in a kitchen and a bathroom, so that the influence of dust and noise caused by opening the window is avoided; air required by combustion of a gas st