Filter, gas generator, airbag and vehicle

The utility model discloses a filter, a gas generator, a safety airbag and a vehicle. The filter includes: a first wall for filtering the airflow; the first wall comprises a flow guide part, the porosity of the flow guide part is smaller than that of the part, not provided with the flow guide part, of the first wall, and the flow guide part is suitable for corresponding to the position of a first exhaust hole in a shell of the gas generator. The flow guide part with reduced porosity is arranged on the side wall of the filter, and the air resistance of the flow guide part is larger than that of other parts of the side wall, so that air in the inner ring space of the filter is forced to pass through the other parts of the side wall, the air flowing distance is increased, the air cooling time is prolonged, and high-temperature air is prevented from leaking to burn the safety air bag; and the reliability of the safety air bag is obviously improved. 本实用新型公开了一种过滤器、气体发生器、安全气囊和车辆。过滤器包括：第一壁，第一壁用于过滤气流；第一壁包括导流部，导流部的孔隙率小