Anti-explosion shelters are used in the production and storage areas of special industries, involving such places as fuel, chemical products and some other toxic and hazardous substances, which are prone to leakage, fire, explosion and poisoning accidents. Under normal operation mode, there is no poisonous and harmful gas outside the explosion-proof shelter, and the fresh air directly enters the room through the fresh air system to meet the daily fresh air requirements; In case of an accident, provide fresh air for the refuge personnel to maintain their life.