Shouldn't the fire door in the refuge room be equipped with a key?

Not worthy. Evacuation doors, fire doors, communication passages, interval air shafts, etc. at fire-fighting special entrances and exits should ensure that they can be opened in the evacuation direction without using tools such as keys in case of fire, and signs and use tips should be set in prominent positions, so keys are not equipped. There are generally three types of fire doors: Class A (used in computer room and control room) has a key, and each lock is equipped with a separate key, which usually does not open each other (common lock cores have a certain mutual opening rate), Class B (used in passages and aisles) has no key, and Class C (used in pipeline wells) is basically the same as this lock core and key, and one key can open the whole community (supplied by the same manufacturer).