A fire protection device and a fire protection method for an equipment room are provided. The fire protection device for the equipment room includes: a carbon dioxide fire extinguisher and a foam fire extinguisher; and a control module, in which the control module is configured to acquire fire information and person information, the person information representing a person situation in the equipment room, and the control module is further configured to control one of the carbon dioxide fire extinguisher or the foam fire extinguisher to extinguish fire according to the fire information and the person information, to extinguish the fire through the carbon dioxide fire extinguisher in a case that the equipment room is vacant.

A method for producing a firefighting medium from water (W) and a liquefied gas, such as liquid nitrogen (LN) or liquid carbon dioxide, a fire extinguisher (200) for extinguishing a fire with the produced firefighting medium, and a method for extinguishing a fire with the produced firefighting medium, wherein the firefighting medium (FFM) is produced by spraying a pressurized jet of water (WJ) out of a nozzle (201) at a pressure of, for instance, at least 50 bar and mixing a proportion of liquid nitrogen (LN) into the jet of water (WJ).

The subject matter of the present invention includes a fully automatic, early detection fire suppression method. The fire suppression method implements MEMS technology combined with artificial intelligence (AI) and machine learning (ML). The fire suppression method includes real-time monitoring, fire detection sensors, and diagnostics algorithms. A uniquely integrated application of technologies provides for distinguishing between safe and dangerously destructive fire events and the instantaneous extinguishing of a dangerous fire at its inception.