A low-pressure mist fire extinguishing device and a set of components for a low-pressure mist fire extinguishing device

A low-pressure mist fire extinguishing device for generating a mist stream as a result of a two-phase flow generated by the device from a gas and a liquid, the device comprising:

• a pressure tank filled with the liquid and the gas and closed with a valve assembly having an inlet side;
• a mixer for generating the two-phase flow of the liquid and the gas and comprising:
• an inlet section comprising:
• liquid ducts terminated with liquid openings, wherein the liquid ducts are connected with the pressure tank through a hydrophore tube;
• and
• gas ducts terminated with gas openings, wherein the gas ducts are connected to the pressure tank;
• an outlet section connected to the inlet side of the valve assembly;
• a chamber between the inlet section and the outlet section, in which separate streams of gas from the gas openings intersect with separate streams of liquids from liquid openings when the device is in use;
• at least one outlet nozzle connected at an outlet side of the valve assembly, the outlet nozzle comprising at least one set of outlet ducts arranged in a colliding manner with respect to each other and having outlet openings of a total cross-sectional area that is larger than a total cross-sectional area of the liquid openings of the mixer;
• wherein in the recommended vertical position of the device, the mixer is located in a space of the tank which is filled with the gas, above a surface of the liquid.