PRESSURE RELIEF VALVE

The present disclosure provides a pressure relief valve configured to adjust a pressure of a vehicle cabin. The pressure relief valve includes: a housing, a passage opening cover, and an implementing mechanism. The housing is provided with a passage therein, the passage is configured to be capable of bringing the vehicle cabin into fluid communication with an outside atmosphere, and the passage has a passage opening. The passage opening cover is configured to be movable between an open position and a closed position, the passage opening is open when the passage opening cover is in the open position, and the passage opening is closed when the passage opening cover is in the closed position. The implementing mechanism is configured to drive the passage opening cover such that the passage opening cover is movable between the open position and the closed position. According to the present disclosure, signal information of pressure in a vehicle cabin, wading and dust density is obtained, and a traditional rotary opening mode of the pressure relief valve is changed into a linear opening mode through motor driving, such that electrification of the pressure relief valve is achieved, noise from the outside of the vehicle is reduced, and waterproof and dustproof performances of the pressure relief valve are improved.