A device for generating a jet of two-phase fluid, comprising a nozzle having a main duct that is fed with a pressurized gaseous fluid and opens into a mixing chamber, and at least one secondary duct that is fed by at least one pressurized fluid and opens into the mixing chamber in a direction forming a non-zero angle with the axis of the main duct. The mixing chamber has a convergent-divergent cylindrical wall having a constriction defining an opening in the plane perpendicular to the axis of the main duct. The convergent part of the wall has a frustoconical region in the continuation of the axis of the at least one secondary duct so as to form a fragmentation chamber for the liquid phase.

The present invention relates to an in-building access path installation type smoke control system. An in-building access path installation type smoke control system is openably and closably installed in an in-building access path and includes a door casing having an intake port and a discharge port, a door nozzle installed in the door casing and configured to spray water supplied from the outside, and a main door body including a negative pressure inducer configured to allow water sprayed from the door nozzle to pass therethrough, generate negative pressure on the basis of the Venturi effect while the water passes therethrough, suck gas at the periphery of the door casing through the intake port, mix the sucked gas with water, and move the gas mixed with the water downward toward the discharge port.

The present invention relates to an in-building access path installation type smoke control system. An in-building access path installation type smoke control system is openably and closably installed in an in-building access path and includes a door casing having an intake port and a discharge port, a door nozzle installed in the door casing and configured to spray water supplied from the outside, and a main door body including a negative pressure inducer configured to allow water sprayed from the door nozzle to pass therethrough, generate negative pressure on the basis of the Venturi effect while the water passes therethrough, suck gas at the periphery of the door casing through the intake port, mix the sucked gas with water, and move the gas mixed with the water downward toward the discharge port.

A fire extinguishing system including a fluid storage container configured to store a fire extinguishing agent, and a fluid stream separating device coupled to the fluid storage container, where the fire extinguishing agent passes from the fluid storage container through the fluid stream separating device so that the fluid stream separating device raises a temperature of at least a portion of the fire extinguishing agent flowing through the fluid stream separating device above a boiling point of the fire extinguishing agent at ambient environmental conditions of a discharge location of the fluid stream separating device.

A fire extinguishing system including a fluid storage container configured to store a fire extinguishing agent, and a fluid stream separating device coupled to the fluid storage container, where the fire extinguishing agent passes from the fluid storage container through the fluid stream separating device so that the fluid stream separating device raises a temperature of at least a portion of the fire extinguishing agent flowing through the fluid stream separating device above a boiling point of the fire extinguishing agent at ambient environmental conditions of a discharge location of the fluid stream separating device.

A nozzle assembly includes a nozzle body and a flow straightener. The nozzle body defines an inlet configured to be fluidly coupled to fluid source, an outlet, and a nozzle body passage extending between the inlet and the outlet. The flow straightener is coupled to the nozzle body and extends at least partially across the nozzle body passage. The flow straightener defines a primary passage and a secondary passage extending through the flow straightener to fluidly couple the inlet and the outlet of the nozzle body. The primary passage defines a primary passage outlet having a cross-sectional area, and the secondary passage defines a secondary passage outlet having a cross-sectional area that is less than the cross-sectional area of the at least one primary passage. At least one of the primary passage outlet and the secondary passage outlet has a circular cross-section.

A nozzle assembly includes a nozzle body and a flow straightener. The nozzle body defines an inlet configured to be fluidly coupled to fluid source, an outlet, and a nozzle body passage extending between the inlet and the outlet. The flow straightener is coupled to the nozzle body and extends at least partially across the nozzle body passage. The flow straightener defines a primary passage and a secondary passage extending through the flow straightener to fluidly couple the inlet and the outlet of the nozzle body. The primary passage defines a primary passage outlet having a cross-sectional area, and the secondary passage defines a secondary passage outlet having a cross-sectional area that is less than the cross-sectional area of the at least one primary passage. At least one of the primary passage outlet and the secondary passage outlet has a circular cross-section.

A high efficiency nozzle is designed. The nozzle allows water streams with long-range and high surface area in one system. Suitable transitions in the fluid pathways allow creating water streams that have a robust flow profile. The system allows minimum energy loss whilst maximizing the velocity and surface area. Such nozzles can be used for a variety of applications including but not limited to fire suppression, pressure washing, watering, and other such applications.

A high efficiency nozzle is designed. The nozzle allows water streams with long-range and high surface area in one system. Suitable transitions in the fluid pathways allow creating water streams that have a robust flow profile. The system allows minimum energy loss whilst maximizing the velocity and surface area. Such nozzles can be used for a variety of applications including but not limited to fire suppression, pressure washing, watering, and other such applications.

A fire suppression system can include at least two fire detectors arranged to scan a protected surface from different vantage points, a fire monitor that provides a fire suppression stream to the protected surface, and a fire suppression controller. The fire suppression controller receives the signal from each fire detector and causes the fire monitor to provide the fire suppression stream to the protected surface at a target location on the protected surface that is offset from the location of the fire by an offset value.