WO2024005290A1

WO2024005290A1 - Water mist spray nozzle device for simultaneously removing smoke, toxic gas and heat of fire

Info

Publication number: WO2024005290A1
Application number: PCT/KR2023/000313
Authority: WO
Inventors: 김성우
Original assignee: 주식회사 에스피앤이
Priority date: 2022-06-27
Filing date: 2023-01-06
Publication date: 2024-01-04

Abstract

The present invention relates to a water mist spray nozzle device for simultaneously removing the smoke, toxic gas and heat of a fire. The nozzle device comprises: a nozzle body for spraying water at the surroundings through a plurality of spray nozzles; and a throttle part, which has the nozzle body in the center thereof, accelerates the water sprayed through the spray nozzles so as to generate negative pressure according to the Venturi effect, and allows the surrounding gas to be affected by the negative pressure and suctioned so as to be mixed with water.

Description

Fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat

The present invention relates to a nozzle device that operates in the event of a fire. More specifically, the present invention relates to a nozzle device that operates in the event of a fire. More specifically, during operation, it sprays water finely and generates negative pressure at the same time, absorbs surrounding fire smoke, toxic gas, and heat, and mixes them with water to remove them. By spraying the water, it quickly lowers the lethal concentration of toxic gases below a safe level, absorbs and removes suspended combustion by-products (soot, soot), secures visibility and induces rapid evacuation, and removes high-temperature heat and soot. A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat, preventing flashover and the spread of fire by removing unburned combustible gases.

In buildings being built recently, various types of firefighting equipment that meet the standards stipulated in the strengthened firefighting law are mandatory. Firefighting equipment includes firefighting equipment, alarm equipment, evacuation equipment, firefighting water equipment, firefighting-related equipment, etc. Recently, smoke control with better performance and no malfunction (the concept of "smoke control (制煙)" under the current law is [Meaning of Ventilation Control] equipment and sprinkler devices that discharge smoke to the outside are being developed and applied. The purpose of these fire-fighting equipment is to detect and extinguish fires early and minimize casualties.

Among the various facilities above, a sprinkler is an automatic fire extinguishing equipment that sprays fire extinguishing water in the event of a fire. It is usually placed on the ceiling of a building and extinguishes a fire by spraying water supplied through standing pipes and branch pipes in a radial direction. do.

There are many different types of conventional sprinklers, including closed and open types. The closed type is a type with a heat sensitive part installed and has a structure in which the spray nozzle is normally closed, while the open type has no heat sensitive part and the spray nozzle is open. Additionally, the closed type includes the melting type and the rupture type. The flashhead melting type has the function of spraying water as the fuse metal melts at the operating temperature and falls off, while the bursting type only has the function of spraying water as the glass bulb breaks at the operating temperature.

Meanwhile, the smoke and toxic gases generated from the fire point reach the ceiling due to buoyancy due to heat, forming a hot air current that increases the pressure in the ceiling, and spread to the cold side, where the pressure is low, forming a thick layer. These high-temperature smoke and toxic gases increase the pressure in the upper part of the room and cause flashover, which ignites at a certain critical point due to radiant heat, further spreading the fire.

However, existing sprinklers only have the function of sprinkling water structurally and functionally, but cannot remove smoke and toxic gases themselves, and cause the problem of cooling the high-temperature smoke and toxic gases in the upper layer by spraying water. When smoke and toxic gases that have expanded at high temperatures are cooled, they contract and 'concentrate and fall', exceeding the lethal limit, creating an environment of asphyxiation, and causing smoke logging where there is no way out. . In other words, the concentrated toxic gas on the floor suffocates the rescuer within just a few seconds, and the visibility is almost zero, blocking the view, creating an environment where escape is almost impossible.

Figure 1 is a diagram for explaining the smoke logging phenomenon that occurs during a fire.

As shown in A) and B) of Figure 1, at the beginning of a fire, high-temperature smoke, toxic gas, and unburned combustible gas continuously rise to the upper part of the indoor space and collect, increasing the pressure and gradually spreading in the direction of lower pressure. , the moment the temperature and pressure exceed the critical point, high temperature unburned combustible gas (smoke) is ignited and a flashover phenomenon occurs.

In this state, when the sprinkler operates and fire-fighting water is sprayed (C)), smoke and toxic gas are cooled and concentrated by the fire-fighting water and begin to descend.

Accordingly, as shown in D), both the upper and lower floors of the indoor space become completely dark, and in a state where the power is cut off due to a fire, the concentration of toxic gas increases over time, reaching a lethal dose. In a dark situation where they cannot see an inch ahead, the rescuer falls into panic, breathing three times faster than usual, becoming entangled, unable to escape, and suffocating to death. For reference, exposure to toxic fire gases for 10 to 15 seconds will result in unconsciousness, and hydrogen cyanide (HCN) and phosgene (COCl2) gases can kill you even after one or two breaths.

Even if you operate a ventilation device that exhausts toxic gases, it will take a long time (much longer than a person can hold their breath) to exhaust the smoke and toxic gases filling the inside of the building and make them breathable. Because this takes so long, the golden time for people to evacuate safely cannot be maintained.

Meanwhile, in addition to sprinklers, water-based fire extinguishing equipment is known as a water mist fire extinguishing system that sprays water in the form of mist. Water mist fire extinguishing equipment is a fire extinguishing equipment that sprays water in the form of fine particles. Compared to sprinklers, it provides an efficient fire extinguishing effect with a small radiation amount of about 10 to 20%, and prevents secondary damage (flooding and damage) after extinguishing. It has the advantage of reducing pollution, etc.) and is mainly applied to ships. However, existing water fountain fire extinguishing equipment only sprays water finely, and like existing sprinklers, due to its structure, it cannot directly remove smoke, toxic gas, unburned combustible gas, and heat.

The reality is that there is an urgent need for devices to not only extinguish flames in the event of a fire, but also reduce the lethal concentration of toxic gases indoors.

The present invention was created to solve the above problems, and in the event of a fire, fine water droplets are sprayed at high speed to reduce the concentration of toxic gases below a safe level in a short period of time and secure visibility to induce rapid evacuation. The purpose is to provide a fine water spray nozzle device that simultaneously removes smoke, toxic gas, and heat.

In addition, in the event of a fire, the present invention uses the solubility of toxic gas to finely spray water and generate negative pressure at the same time to remove smoke, toxic gas, and heat by mixing them with water and removing the water. By spraying, it lowers the lethal concentration of toxic gases below a safe level in a short period of time, absorbs and removes floating combustion by-products (soot, soot), secures visibility to encourage rapid evacuation, and protects against high temperature heat and unburned combustibility. The purpose is to provide a fine water spray nozzle device that simultaneously removes fire smoke, toxic gas, and heat to prevent flashover and spread of fire by removing gas.

A fine water spray nozzle device for simultaneously removing fire smoke, toxic gas, and heat according to the present invention as a means of solving the problem for achieving the above object, comprising: a nozzle body that sprays water to the surroundings through a plurality of spray nozzles; It has a nozzle body in the center, accelerates the water sprayed through the spray nozzle, generates negative pressure according to the Venturi effect, and includes a throttling portion that causes surrounding gas to be sucked in under the action of negative pressure and mixed with water.

In addition, the nozzle body includes a body that receives water supplied through the water supply pipe and distributes it to each spray nozzle, and the spray nozzle includes; It includes a first spray nozzle located on the side of the body and a second spray nozzle located on the lower side of the body, and a throttling portion; It is provided with an upper throttling plate and a lower throttling plate that are spaced apart from each other across a stream line of water ejected from the first spray nozzle.

Additionally, the upper throttle plate; It has a body coupling part coupled to the nozzle body and a plurality of gas guide holes that are symmetrical about the body coupling part and through which gas passes when negative pressure is generated, and the lower throttle plate includes; It is located at the lower part of the upper throttle plate and has a center hole in the center through which the second spray nozzle passes.

In addition, a first Coanda surface and a second Coanda surface are provided on the bottom of the upper throttle plate and the upper surface of the lower throttle plate, respectively, to expand the flow cross-sectional area of water passing between the upper and lower throttle plates.

In addition, a guide diaphragm is further provided between the upper throttle plate and the lower throttle plate to maintain the gap between the upper and lower throttle plates and to guide the flow of water ejected through the first spray nozzle.

In addition, the throttling portion further includes a vertical Venturi pipe that passes water ejected from the second spray nozzle downward and creates negative pressure according to the Venturi effect.

In addition, a portion of the guide diaphragm penetrates the upper throttle plate and is exposed to the upper portion of the upper throttle plate, thereby guiding gas above the upper throttle plate to the gas guide hole.

Additionally, a plurality of radial guides are provided on the first Coanda surface and the second Coanda surface to guide the flow of ejected water in a radial direction.

In addition, a vortex inductor that forms a vortex in the ejected water is installed inside the first spray nozzle and the second spray nozzle.

Additionally, the upper throttle plate takes the shape of a concave plate that is curved and recessed, and the lower throttle plate takes the shape of a curved upward protruding plate, and the structure in which the upper and lower throttle plates are combined is an overall circular plate venturi structure.

The fine water spray nozzle device of the present invention that simultaneously removes fire smoke, toxic gases, and heat as described above sprays fine water droplets at high speed in the event of a fire, lowering the heat and absorbing and removing smoke and toxic gases in the room, By allowing fine water droplets to collect floating combustion by-products, the concentration of toxic gases can be quickly reduced to below a safe level and visibility distance can be secured to encourage rapid evacuation.

In addition, in the event of a fire, water is finely sprayed and negative pressure is generated at the same time to remove surrounding fire smoke, toxic gases, and heat by mixing with intake and water, and by spraying the water, the lethal dose of toxic gases indoors is reduced. ) Prevents suffocation by lowering the concentration below a safe level, absorbs and removes floating combustion by-products (soot, soot), secures visibility to encourage rapid evacuation, and removes high-temperature heat and unburned combustible gases. Remove to prevent flashover and spread of fire.

Figure 1 is a diagram to explain the smoke-logging phenomenon that occurs when existing sprinklers operate during a fire.

Figure 2 is a diagram showing a fine water spray nozzle device for simultaneous removal of fire smoke, toxic gas, and heat according to an embodiment of the present invention mounted on a water supply pipe.

Figures 3 and 4 are perspective views of the nozzle device shown in Figure 2.

Figure 5 is a side view of the nozzle device of Figure 2.

FIG. 6 is an exploded perspective view of the nozzle device shown in FIG. 2.

FIG. 7 is a cutaway perspective view separately illustrating the nozzle unit and vertical venturi pipe of FIG. 6.

Figure 8 is an exploded perspective view for explaining the fixing method of the guide blade to the upper curved plate shown in Figure 6.

FIG. 9 is a diagram for explaining a method of combining the lower curved plate and guide blades of FIG. 6.

Figure 10 is a side cross-sectional view showing the flow characteristics of fire smoke and toxic gas when using the nozzle device shown in Figure 2.

Figure 11 is a side view showing a modified example of a water spray nozzle device according to an embodiment of the present invention.

Figures 12 and 13 are perspective views of the nozzle device shown in Figure 11.

Figure 14 is a cross-sectional view of the nozzle device of Figure 11.

Figure 15 is a cross-sectional view showing the internal structure of a nozzle body applied to a nozzle device according to an embodiment of the present invention.

FIG. 16 is a diagram separately illustrating the vortex inductor shown in FIG. 15.

Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the attached drawings.

Figure 2 is a view showing a fine water spray nozzle device 20 that simultaneously removes fire smoke, toxic gas, and heat according to an embodiment of the present invention mounted on the water supply pipe 11, and Figure 3 shows and FIG. 4 is a perspective view of the nozzle device shown in FIG. 2, and FIG. 5 is a side view of the nozzle device shown in FIG. 2. Additionally, FIG. 6 is an exploded perspective view of the nozzle device shown in FIG. 2, and FIG. 7 is an exploded perspective view separately showing the nozzle unit and vertical venturi pipe of FIG. 6. And, Figure 8 is an exploded perspective view for explaining the fixing method of the guide blade to the upper curved plate shown in Figure 6, and Figure 9 is a view for explaining the coupling method of the lower curved plate and guide blade shown in Figure 6. Figure 10 is a side cross-sectional view showing the flow characteristics of fire smoke and toxic gas in a nozzle device according to an embodiment of the present invention.

The water spray nozzle device 20 according to this embodiment is mounted on the water supply pipe 11 through a coupling nut 13. The water supply pipe 11 is a general sprinkler pipe and is placed under the ceiling of the building. The nozzle device 20 can be installed in its place by removing the existing sprinkler head. There is no need for new piping equipment to install the nozzle device.

In the event of a fire, firefighting water supplied through the water supply pipe is pressurized into each nozzle device 20 and then sprayed in the form of mist. The diameter size of the water droplet particles sprayed from the nozzle device 20 is adjusted to approximately 1000 μm or less. The particle size range of the water droplets can be adjusted by changing the pressure of the fire-fighting water or the type of the first and second spray nozzles (33 and 35).

Some of this fine spray water evaporates before reaching the flame and removes surrounding heat with high latent heat of evaporation, while the fine spray water with a relatively large diameter passes through the flame and reaches the combustible material, cooling the surface of the combustible material and preventing thermal decomposition of the combustible material. Reduces the expansion of combustion by lowering the oxygen concentration around the flame. Additionally, countless small water droplets around the flame block radiant heat radiated from the flame to surrounding unburned combustibles.

In particular, when water ejects from the nozzle device 20, surrounding gases (smoke, toxic gas, unburned combustible gas, soot, soot, fine dust, etc., all gases generated during a fire) are blown into the nozzle device 20 due to the Bernoulli effect. After being inhaled, it is mixed with water and removed. In other words, smoke, toxic gases, unburned combustible gases, hot heat, ultrafine dust, etc. are removed by being physically adsorbed to water or through dissolution and dilution. Through this action, the concentration of toxic gas is significantly lowered, thereby preventing suffocation and ensuring visibility for escape. Furthermore, the water mixed with the nitrogen gas in the smoke has a suffocating extinguishing function, allowing the flame to be extinguished more efficiently.

As shown, the nozzle device 20 according to this embodiment includes a nozzle body 30 and a throttling portion.

The nozzle body 30 sprays water to the surroundings through a plurality of spray nozzles and has a body 31, a nut coupling portion 32, a first spray nozzle 33, and a second spray nozzle 35. .

The body 31 has a roughly hexahedral shape and has a nut coupling portion 32 at the top. The nut coupling portion 32 is a part screwed to the coupling nut 13 as shown in FIG. 2. Firefighting water supplied through the water supply pipe (11) flows into the body (31) through the nut coupling portion (32). Additionally, a screen (32a) is installed inside the nut coupling portion (13). The screen 32a is a blocking net that blocks foreign substances from entering. The screen 32a can be made of stainless steel. In some cases, the screen can be omitted.

The first spray nozzle 33 is disposed on the side of the body 31 and sprays firefighting water pressurized into the body 31 in the side direction. Firefighting water is ejected through the first spray nozzle (33) and atomized in the form of mist. The streamline of water ejected from the first spray nozzle 33 is accelerated while passing through the throttling portion, that is, the throttling passage 21 between the upper throttling plate 41 and the lower throttling plate 51, which will be described later.

According to Bernoulli's principle, as the flow rate of the fluid increases, the pressure decreases, so while water is sprayed, surrounding toxic gases gather in the nozzle device 20 and mix with the water. At this time, part of the toxic gas is dissolved and diluted in water, and the other part is adsorbed and collected in water, and the concentration of indoor toxic gas decreases, as described above.

The second spray nozzle 35 is located in the lower center of the body 31 and sprays firefighting water inside the body 31 downward. The specifications of the second spray nozzle (35) are the same as those of the first spray nozzle (33).

And a venturi pipe holder 37 is provided around the second spray nozzle 35. The venturi tube holder (37) is a member coupled to the upper end of the vertical venturi tube (39). The venturi tube holder 37 ensures a gap through which gas passes between the body 31 and the vertical venturi tube 39.

The vertical venturi pipe 39 is fixed to the venturi pipe holder 37 and accelerates the water ejected through the second spray nozzle 35 to create negative pressure. Of course, the surrounding gas is sucked into the vertical venturi tube 39 and mixed with water due to the induced negative pressure.

The vertical Venturi tube 39 is a typical Venturi tube having an inlet part 39a, an outlet part 39b, and a neck part 39c, and is vertically fixed to the lower part of the nozzle body 30. The flow of water ejected through the second spray nozzle (35) passes through the vertical venturi pipe (39) and expands after acceleration. The vertical venturi tube (39) is part of the constriction section.

The internal structure of the nozzle body 30 will be further explained with reference to FIGS. 15 and 16.

Meanwhile, the throttling unit has a nozzle body 30 at the center and accelerates the water sprayed through the first and

second spray nozzles

33 and 35 to generate negative pressure according to the Venturi effect and Coanda principle, The surrounding gas is inhaled under the influence of negative pressure and is induced to mix with water.

The throttling portion includes an upper throttling plate (41), a lower throttling plate (51), and a vertical venturi pipe (39).

The upper throttling plate 41 and the lower throttling plate 51 are spaced apart from each other across the stream line of water ejected from the first spray nozzle. The combined structure of the upper throttle plate 41 and the lower throttle plate 51 is also an overall circular plate venturi structure.

The upper throttle plate 41 is a three-dimensional structure manufactured by pressing a metal plate with a certain thickness and diameter, and has a body coupling portion 41f at the center. A coupling hole 41g is formed in the body coupling portion 41f. The nut coupling portion 32 of the nozzle body 30 is located at the upper part of the coupling hole (41g), and the body 31 is located at the lower part of the coupling hole (41g).

The upper throttle plate 41 takes a shape that goes downward and then rises upward in the radial direction around the body coupling portion 41f. In other words, the virtual extension line extending in the radial direction takes the shape of an approximately parabola that widens upward.

By bending the outer portion of the upper throttle plate 41 upward in this way, the first Coanda surface 41d is formed on the bottom of the upper throttle plate 41 and the curved portion 41b is formed on the upper surface.

The curved portion 41b guides a portion of the gas sucked into the gas guide hole 41c, which will be described later. Some gas slides through the curved portion (41b) into the gas guide hole (41c), hits the bottom of the body coupling portion (41f), and then moves to the first spray nozzle (33).

The upper throttle plate 41 is formed with a plurality of gas guide holes 41c and conformal slits (41a in FIG. 8).

The gas guide hole 41c is symmetrical around the body coupling portion 41f, and is a passage through which surrounding gas is sucked in the direction of arrow a in FIG. 5 when negative pressure is generated. When water is ejected from the first spray nozzle 33, a negative pressure is formed between the upper and

lower throttle plates

41 and 51, so the water is eventually sprayed and the gas is sucked in and mixed with the water.

The conformal slit 41a is a through slit formed between the gas guide holes 41c and extending in the radial direction. The conformal slit 41a is a through hole into which the guide diaphragm 45 is inserted.

The guide diaphragm 45 is a member that maintains the gap between the upper and

lower throttle plates

41 and 51 and guides the flow of water ejected through the first spray nozzle. The water ejected from the first spray nozzle (33) passes between the guide plates (45) and has a certain degree of straightness. The number of guide plates (45) is the same as the number of first spray nozzles (33).

The guide diaphragm 45 is arranged at an equal angle around the nozzle body 30. The guide diaphragm 45 has a diaphragm portion 45a, an extension portion 45c, and a locking protrusion 45g. The partition portion 45a is a portion accommodated between the upper throttle plate 41 and the lower throttle plate 51. A lower curved plate fixing portion 45e is formed on the bottom of the partition portion 45a. The lower curved plate fixing portion (45e) is a portion that is in close contact with the upper surface of the lower throttle plate (51).

In addition, as shown in FIG. 3, the upper portion of the partition portion 45a penetrates the upper throttle plate 41 and is exposed to the upper portion of the upper throttle plate, thereby guiding the flow of gas toward the gas guide hole. .

The extension portion 45c is a portion extending in the radial direction of the upper and

lower throttle plates

41 and 51. The extension portion 45c guides the flow of water leaving the upper and

lower throttling plates

41 and 51 to extend and extend the flow of water.

As shown in FIG. 9, the locking protrusion 45g is a protrusion inserted into the plate support hole 51c formed in the lower throttle plate 51. Just by inserting the locking protrusion (45g) of each guide plate (45) into the plate support hole (51c), the six guide plates (45) are automatically set to an equal angle.

The lower throttling plate 51 is made by pressing a disk-shaped metal plate with a certain diameter and thickness, and takes a shape curved downward in the radial direction around the center hole 51a. As shown in FIG. 10, the center hole 51a is a passage through which the second spray nozzle 35 and the venturi pipe holder 37 pass downward.

And six plate support holes (51c) are located around the center hole (51a). The plate support hole 51c is a hole into which the locking protrusion 45g of the guide plate 45 is inserted. The diaphragm support hole (51c) also serves as a passage through which a portion of the gas below the lower throttle plate (51) ascends toward the first spray nozzle (33).

A guide curved portion 51d is formed on the bottom of the lower throttle plate 51. The guide curved surface portion 51d is a guide surface that guides the gas below the lower throttle plate to the inlet side of the vertical venturi pipe when negative pressure is generated in the vertical venturi pipe 39. Additionally, a second Coanda surface 51f is formed on the upper surface of the lower throttle plate 51. The second Coanda surface (51f) is a curved surface facing the first Coanda surface (41d).

The first and second Coanda surfaces 41d and 51f are curved surfaces that greatly expand the flow cross-sectional area of water ejected through the first spray nozzle 33 and passing through the throttling passage 21, according to the known Coanda effect. Of course, as the flow cross-sectional area expands, a greater negative pressure is induced.

FIG. 11 is a side view showing a modified example of a fine water spray nozzle device according to an embodiment of the present invention, FIGS. 12 and 13 are perspective views of the nozzle device shown in FIG. 11, and FIG. 14 is a nozzle of FIG. 11. This is a cross-sectional view of the device.

Reference numbers that are the same as those mentioned above indicate the same members with the same function.

Referring to the drawing, it can be seen that a plurality of radial guides 41k are formed on the bottom of the upper throttle plate 41. The radial guide 41k is a linear protrusion that has a triangular cross-section and extends in the radial direction, and is attached to the first Coanda surface 41d to guide the flow of fluid in the radial direction. By the action of the radial guide (41k), a straight line is given to the fluid flow and the reach distance of the sprayed water droplets is expanded.

Likewise, a plurality of radial guides 51k are formed on the upper surface of the lower throttle plate 51. The radial guide 51k is a linear protrusion that has a triangular cross-section and extends in the radial direction. The radial guide 51k is attached to the second Coanda surface 51f and extends the reach of the sprayed water droplets by guiding the flow of the flowing fluid in the radial direction.

A guide plate 46 of a different shape is installed between the upper throttle plate 41 in the form of a round, depressed concave plate and the lower throttle plate 51 in the form of a round, protruding or protruding convex plate. The guide diaphragm 46 maintains the gap between the upper and

lower throttle plates

41 and 51 and guides the flow of fluid ejected from each first spray nozzle 33. The structure in which the upper and lower throttle plates (41, 51) are combined is also an overall circular plate venturi structure.

FIG. 15 is a cross-sectional view showing the internal structure of the nozzle body 30 applied to the nozzle device according to an embodiment of the present invention, and FIG. 16 is a separate view showing the vortex inductor 34 shown in FIG. 15.

As shown, an inflow passage 31a and a plurality of branch passages 31b are formed inside the nozzle body 30. The water flowing in through the inlet passage (31a) branches into the branch passage (31b) and then is ejected to the outside through the first spray nozzle (33) and the second spray nozzle (35).

In particular, a vortex conductor 34 is rotatably installed inside the first spray nozzle 33 and the second spray nozzle 35. The vortex inducer 34 serves to form a vortex in the ejected water. In other words, it forms a vortex in the water, causing the water to swirl and erupt, so to speak (vortex effect).

This vortex conductor 34 consists of a central axis portion 34a and a plurality of wing portions 34c. The wing portion 34c is symmetrical about the central axis portion 34a, and rotates under the pressure of water passing through the spray nozzle, thereby generating a vortex in the water. The water ejected from the first and second spray nozzles (33, 35) is atomized and has a vortex-like flow to more actively contact suspended substances such as toxic gases and dust, further improving the effectiveness of the nozzle device.

Above, the present invention has been described in detail through specific embodiments, but the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention.

Claims

A nozzle body that sprays water to the surrounding area through a plurality of spray nozzles;

It has a nozzle body in the center, accelerates the water sprayed through the spray nozzle, generates negative pressure according to the Venturi effect, and includes a throttling portion that allows the surrounding gas to be sucked in and mixed with water under the action of the negative pressure,

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to paragraph 1,

The nozzle body has a body that receives water supplied through a water supply pipe and distributes it to each spray nozzle,

The spray nozzle is;

It includes a first spray nozzle located on the side of the body and a second spray nozzle located on the lower side of the body,

Throttle department;

Equipped with an upper throttling plate and a lower throttling plate spaced apart from each other across a stream line of water ejected from the first spray nozzle,

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to paragraph 2,

The upper throttle plate is;

A body coupling part coupled to the nozzle body,

It is symmetrical around the body joint and has multiple gas induction holes through which gas passes when negative pressure is generated.

The lower throttle plate is;

It is located at the lower part of the upper throttle plate and has a center hole in the center through which the second spray nozzle passes,

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to paragraph 3,

On the bottom of the upper throttle plate and the upper surface of the lower throttle plate,

A first Coanda surface and a second Coanda surface are provided to expand the cross-sectional flow area of water passing between the upper and lower throttle plates, respectively,

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to paragraph 3,

Between the upper throttle plate and the lower throttle plate,

A guide plate is further provided to maintain the gap between the upper and lower throttle plates and guide the flow of water ejected through the first spray nozzle,

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to paragraph 3,

As the throttling portion,

It further includes a vertical venturi tube that passes water ejected from the second spray nozzle downward and creates negative pressure according to the venturi effect,

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to clause 5,

Part of the guide plate is,

Penetrating the upper throttling plate and exposing the upper part of the upper throttling plate, the gas above the upper throttling plate is guided to the gas induction hole.

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to paragraph 4,

On the first Coanda surface and the second Coanda surface,

Multiple radial guides are provided to guide the flow of erupting water in a radial direction.

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to paragraph 2,

Inside the first spray nozzle and the second spray nozzle,

Built-in vortex inductor that forms a vortex in the ejecting water,

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.
According to paragraph 2,

The upper throttling plate takes the shape of a curved concave plate,

The lower throttling plate takes a curved, upwardly protruding shape,

The structure of the upper and lower throttling plates is an overall circular plate venturi structure,

A fine water spray nozzle device that simultaneously removes fire smoke, toxic gases, and heat.