Fire-extinguishing bomb

A fire-extinguishing bomb, comprising:

• an outer casing defining therein an inner space isolated from the outside;
• an extinguishant storage part installed in the outer casing, the extinguishant storage part having an open top covered with a mesh cover, and having closed side and bottom walls, and containing an extinguishant that is contained in a solid state and is burnt at a predetermined burning point or higher;
• a mesh inner casing placed in the outer casing at a location above the extinguishant storage part such that the inner casing is spaced apart from an inner surface of the outer casing, with a coolant contained in the inner casing;
• a sealed inner casing holder connecting the inner casing to the inner surface of the outer casing such that the inner casing is fixed to the inner surface of the outer casing;
• and
• an ignition unit for igniting the extinguishant contained in the extinguishant storage part, wherein a plurality of ejection holes formed through an upper part of the outer casing which is placed above the inner casing holder, the ejection holes formed thoroughly from the inner surface to an outer surface of the outer casing.