Exhaust device

The utility model provides an exhaust device which comprises a breather pipe, a protective cover and a supporting body, a fairing is arranged between the breather pipe and the protective cover, the fairing is a truncated cone shell, the breather pipe is a pipe body with the two ends ventilated, and the outer edge size of an upper port of the breather pipe is smaller than that of a lower port of the fairing. An upper port of the fairing is connected with the lower portion of the protective cover, an upper port of the breather pipe is inserted into a lower port of the fairing, the breather pipe is connected with the fairing through a supporting body, and a space formed by the breather pipe, the fairing and the protective cover forms an exhaust channel. The fairing and the ventilation pipe have the flow guiding and rectifying effects on incoming flow and have the suction effect on indoor air. The device can exhaust by using natural wind power and indoor hot air buoyancy, does not flow backwards, does not have a rotating part, does not need an additional wind direction tracking device, and is simple in structure, low in cost, long in service life, noiseless and high in exhaust efficiency. The device is used for places where structures need exhausting or ventilation heat dissipation.