Heat extraction device for hot channel

The invention relates to the technical field of heat exchange of heat channels, in particular to a heat extraction device for a heat channel. According to the heat extraction device for the heat channel, the air temperature difference can be reduced, and the inside and the outside of the heat channel are separated. A heat extraction device for a heat channel comprises a wall plate, a protective frame, a rotating part, a heat exchange mechanism and a ventilation mechanism, the protective frame is connected to the middle of the wall plate, the rotating part is rotationally connected into the protective frame, the heat exchange mechanism is arranged on the rotating part, and the ventilation mechanism is arranged on the protective frame. The heat exchange plate rotates by rotating the rotating handle, then heat conversion of the heat channel is achieved, meanwhile, the heat channel can be internally and externally separated to a certain extent through the isolation plate, and air convection in the heat exchange p