Smoke exhaust fireproof valve of heating and ventilation equipment

The utility model discloses a smoke exhaust fireproof valve of heating and ventilation equipment, which comprises a machine frame, two side plates are arranged in the machine frame, two sealing strips are arranged between the two side plates, three first rotating shafts are arranged between the two sealing strips, the first rotating shafts are connected with the side plates, and blades are arranged on the first rotating shafts. When the temperature sensor detects that the temperature is too high, the motor is automatically started to enable the blades to rotate to a closed state, the smoke-isolating and fireproof effects are achieved, meanwhile, under the high-temperature effect of a fire, the bumper is fused, the baffle rotates and blocks the rear sides of the blades, and therefore the blades are prevented from being burst open by strong airflow in the fire, and the stability of the smoke-isolating and fireproof effects is ensured; therefore, the fire safety performance of the equipment is improved. 本实用新型公开了