A wall-mountable spray head unit (11) is described. The spray head unit includes a rotatable spray head assembly (8.sub.1, 8.sub.2; FIG. 9, 8.sub.3; FIG. 17) which comprises a spray manifold (18.sub.1, 18.sub.2; FIG. 9) rotatable about a first axis (17), a spray nozzle (19) supported by the spray manifold and orientated to deliver fire-suppressant material radially in a plane in a plane defined by the first axis and a second axis which is perpendicular to the first axis, and at least one thermal sensor (20).

A wall-mountable spray head unit (11) is described. The spray head unit includes a rotatable spray head assembly (8.sub.1, 8.sub.2; FIG. 9, 8.sub.3; FIG. 17) which comprises a spray manifold (18.sub.1, 18.sub.2; FIG. 9) rotatable about a first axis (17), a spray nozzle (19) supported by the spray manifold and orientated to deliver fire-suppressant material radially in a plane in a plane defined by the first axis and a second axis which is perpendicular to the first axis, and at least one thermal sensor (20).

An injection head is configured to discharge a liquefied fire-extinguishing agent. The injection head includes an injection head body configured to be connected to piping for supplying the liquefied fire-extinguishing agent; an orifice plate positioned in the injection head body, the orifice plate including orifices defined therein; a block-shaped porous member positioned at an outlet of the orifice plate; and a deflector positioned across from the block-shaped porous member such that a discharging clearance for the liquefied fire-extinguishing agent is defined.

The present invention discloses a Fire-fighting water cannon comprising: a first motor assembly including a first housing, a first stator assembly, a first rotor assembly and a central shaft; both ends of the first housing are respectively provided with a first end cover and a second end cover, the first end of the first stator assembly is connected with the second end cover, the first rotor assembly is sleeved on the outside of the first stator assembly, and the first rotor assembly is rotatably connected with the first housing; the cannon head assembly including a first cannon head and a second cannon head, the first cannon head is connected with the first stator assembly, the second cannon head is sleeved on the outside of the first cannon head, and the second cannon head is threadedly connected with the first rotor assembly, the first cannon head is provided with a first anti-rotation device; the cannon core assembly is arranged on the central axis and cooperates with the cannon head assembly. With this arrangement, the switching of the spray state of the Fire-fighting water cannon is controlled by electrical signals, which makes the switching easier and faster, the spray state of the Fire-fighting water cannon can be accurately controlled to meet the needs of various working environments and achieve the effect of saving energy and resources.

The present invention discloses a Fire-fighting water cannon comprising: a first motor assembly including a first housing, a first stator assembly, a first rotor assembly and a central shaft; both ends of the first housing are respectively provided with a first end cover and a second end cover, the first end of the first stator assembly is connected with the second end cover, the first rotor assembly is sleeved on the outside of the first stator assembly, and the first rotor assembly is rotatably connected with the first housing; the cannon head assembly including a first cannon head and a second cannon head, the first cannon head is connected with the first stator assembly, the second cannon head is sleeved on the outside of the first cannon head, and the second cannon head is threadedly connected with the first rotor assembly, the first cannon head is provided with a first anti-rotation device; the cannon core assembly is arranged on the central axis and cooperates with the cannon head assembly. With this arrangement, the switching of the spray state of the Fire-fighting water cannon is controlled by electrical signals, which makes the switching easier and faster, the spray state of the Fire-fighting water cannon can be accurately controlled to meet the needs of various working environments and achieve the effect of saving energy and resources.

A method of suppressing a kitchen fire includes detecting a fire and identifying a location of the fire with a tracking system, aiming a nozzle at the location, and releasing an agent through the nozzle at the location.

A method of suppressing a kitchen fire includes detecting a fire and identifying a location of the fire with a tracking system, aiming a nozzle at the location, and releasing an agent through the nozzle at the location.

A nozzle assembly includes a nozzle body, a first flow straightener coupled to the nozzle body, and a second flow straightener coupled to the nozzle body. The nozzle body defines an inlet, an outlet, and a nozzle body passage extending between the inlet and the outlet. The first flow straightener extends at least partially across the nozzle body passage and defines a first passage and a second passage each fluidly coupling the inlet and the outlet. The second flow straightener extends at least partially across the nozzle body passage and defines a third passage and a fourth passage each fluidly coupling the inlet and the outlet.

A nozzle assembly includes a nozzle body, a first flow straightener coupled to the nozzle body, and a second flow straightener coupled to the nozzle body. The nozzle body defines an inlet, an outlet, and a nozzle body passage extending between the inlet and the outlet. The first flow straightener extends at least partially across the nozzle body passage and defines a first passage and a second passage each fluidly coupling the inlet and the outlet. The second flow straightener extends at least partially across the nozzle body passage and defines a third passage and a fourth passage each fluidly coupling the inlet and the outlet.

There is described a fire-fighting apparatus comprising a housing comprising an upstream air inlet and a downstream fire-extinguishing stream outlet and a hollow body therebetween, wherein the housing houses an air stream traveling at high velocity; and a spray assembly concentrically mounted to the housing. The spray assembly comprises a fluid inlet connected to a source of fluid outside the housing; and a plurality of injecting assemblies fluidly connected to the fluid inlet and designed for breaking down an inflow of the fluid into droplets and projecting the droplets of the fluid within the air stream in a multiphase fire-extinguishing stream. The injecting assemblies each comprises a fluid outlet; a base plate through which extends the fluid outlet; a holding structure mounted to the base plate and extending downstream therefrom, and a unibody jet-fragmenting device mounted to the holding structure facing the stream of fluid exiting the fluid outlet.