Method for fire suppression using a core-shell ice structure and core-shell ice structure for fire suppression

Abstract

The present invention provides a fire suppression method comprising the steps of: manufacturing an ice structure having a core-shell structure comprising a core containing water and an ice shell; and dropping the ice structure at a fire site; and an ice structure having a core-shell structure for fire control comprising a core containing water and an ice shell.

Description

Technology Field

[0001] The present invention relates to a fire suppression method, and more specifically, to a fire suppression method for manufacturing an ice structure with a core-shell structure containing water inside and forming an ice shell on the outside, and dropping it at a fire site, and to an ice structure with a core-shell structure for fire control. Background Technology

[0002] When suppressing large-scale fires such as wildfires, the method of dropping water from the air using firefighting helicopters or drones is generally used. However, dropping water from above high-temperature fire sites has the disadvantage that it is difficult to deliver to the target location because the water disperses and scatters, making it highly susceptible to wind. Furthermore, since the water evaporates due to the heat before reaching the fire source, the actual suppression efficiency is not high.

[0003] To address the aforementioned problems, various types of fire extinguishing grenades have been developed and are in use. These grenades are utilized by exploding above the flames upon being dropped from the air to spray extinguishing liquid, or by being destroyed upon impact with the ground to spray the liquid.

[0004] While the aforementioned fire extinguishing grenades alleviate the disadvantages of dropping water to some extent, they have the drawback of a significant rate of unexploded ordnance that fails to detonate or be destroyed at the intended location. Additionally, the higher cost compared to water-based methods is also cited as a disadvantage.

[0005] Therefore, the development of a fire suppression method capable of improving the aforementioned disadvantages is required.

[0006] Meanwhile, fire is one of the disasters where a rapid response is essential, and failure to suppress it in the early stages can lead to large-scale damage. In particular, fire suppression in hard-to-reach high-rise buildings, forested areas, or hazardous zones requires faster and more effective response measures due to the limited access of ground personnel.

[0007] Due to this need, firefighting drones are attracting attention, and they have the advantage of being able to arrive at the scene quickly and support fire suppression in high-risk areas that are difficult for humans to access.

[0008] However, firefighting means applicable to the aforementioned drones are still in short supply. Therefore, the development of firefighting means that can be effectively applied to drones is required. Prior art literature

[0009] Republic of Korea Published Patent No. 10-2026-0043779 The problem to be solved

[0010] The present invention has been devised to resolve the above-mentioned problems of the prior art, and

[0011] The purpose is to provide a fire suppression method using a core-shell structured ice structure that can maximize fire suppression efficiency by preventing water dropped from above from failing to reach a target location due to wind influence while dispersing, and by preventing it from easily evaporating before reaching the fire source.

[0012] In addition, the present invention aims to provide a fire suppression method using a core-shell structured ice structure, wherein a drone directly draws water from a water source near the fire site and manufactures the core-shell structured ice structure on the spot during flight, thereby enabling a large quantity of ice structures to be dropped onto the flames in a short period of time.

[0013] In addition, the present invention aims to provide a fire suppression method using a core-shell structured ice structure capable of efficiently suppressing a fire by swarm-controlling a plurality of drones and controlling the drones based on real-time thermal imaging data.

[0014] In addition, the present invention aims to provide an ice structure with a core-shell structure for fire prevention, comprising a core containing water and an ice shell. means of solving the problem

[0016] To achieve the above objective, the present invention

[0017] A step of manufacturing an ice structure having a core-shell structure including a core containing water and an ice shell; and

[0018] A fire suppression method is provided, comprising the step of dropping the above ice structure onto the fire site.

[0019] In one embodiment of the present invention, the core-shell structured ice structure may be manufactured by containing water in a mold of a predetermined shape and spraying liquid nitrogen onto the surface of the water or the outer surface of the mold.

[0020] In one embodiment of the present invention, the core-shell structured ice structure can be delivered to a fire site by a drone.

[0021] In one embodiment of the present invention, the drone is equipped with an ice structure manufacturing device, and can suppress a fire by taking water from a water source near the fire site to the ice structure manufacturing device to manufacture an ice structure and dropping the manufactured ice structure onto the fire site.

[0022] In one embodiment of the present invention, the ice structure manufacturing device comprises an inner mold that holds and contains water and an outer mold located at a distance from the inner mold, and the outer mold is provided with a liquid nitrogen supply unit that supplies liquid nitrogen to the outer surface of the inner mold.

[0023] The above ice structure manufacturing device includes a first mold and a second mold that can be separated and combined so as to separate the molded core-shell structure ice structure, and the first mold and the second mold are connected so as to be openable and sealed by a hinge, and may further be provided with a locking device.

[0024] In one embodiment of the present invention, the liquid nitrogen supply unit may include a plurality of spray nozzles provided on the inner surface of the outer mold (60) to spray liquid nitrogen onto the outer surface of the inner mold.

[0025] In one embodiment of the present invention, the ice structure manufacturing device may further include a water source supply unit that sucks water from a water source and supplies it to an internal mold.

[0026] In one embodiment of the present invention, the water supply unit may be in the form of a water supply pipe that communicates with an inner mold, extends through an outer mold, and is exposed outside the mold.

[0027] In one embodiment of the present invention, the ice structure manufacturing device may further include a temperature control device that maintains the ice structure so that it does not melt and remains intact until it is dropped.

[0028] In one embodiment of the present invention, the temperature control device may further include a heater capable of heating the core-shell structured ice structure so that it detaches easily from the mold.

[0029] In one embodiment of the present invention, the fire suppression method may further include a control system that controls a drone to fly autonomously to the coordinates of a fire occurrence and controls a plurality of drones in a cluster.

[0030] In one embodiment of the present invention, the control system may be provided in a separate aircraft from the drone.

[0031] In one embodiment of the present invention, the control system may control the drone by receiving real-time fire data from a thermal imaging camera equipped on the aircraft.

[0032] In one embodiment of the present invention, the control system may control the drone by receiving real-time fire data from a thermal imaging camera equipped on each drone.

[0034] The present invention also,

[0035] The present invention provides an ice structure with a core-shell structure for fire prevention, comprising a core containing water and an ice shell. Effects of the invention

[0037] The fire suppression method of the present invention utilizes a core-shell structured ice structure to prevent water dropped from above from failing to reach a target location due to wind influence while dispersing, and to prevent it from easily evaporating before reaching the fire source, thereby providing the effect of maximizing fire suppression efficiency.

[0038] In addition, the fire suppression method of the present invention provides the effect of being able to drop a large amount of ice structures into the flames in a short period of time by having the drone directly draw water from a water source near the fire site and manufacture a core-shell structured ice structure on the spot during flight.

[0039] In addition, the fire suppression method of the present invention provides the effect of efficiently suppressing a fire by controlling a plurality of drones in a swarm and controlling the drones based on real-time thermal imaging data.

[0040] The ice structure of the core-shell structure for fire control according to the present invention, comprising a water-containing core and an ice shell, can be utilized as a highly efficient fire suppression means due to its special structure. Brief explanation of the drawing

[0042] FIG. 1 is a drawing showing an apparatus for manufacturing a core-shell structured ice structure and the structure of said ice structure as an embodiment of the present invention. FIG. 2 is a drawing showing a drone equipped with a device for manufacturing a core-shell structure ice structure as an embodiment of the present invention. FIG. 3 is a schematic diagram illustrating a method of dropping an ice structure by a drone equipped with a device for manufacturing a core-shell structure, as an embodiment of the present invention. FIG. 4 is a schematic diagram illustrating a fire suppression method of a fire suppression swarm drone as an embodiment of the present invention. FIG. 5 is a schematic diagram illustrating the operating principle of the core-shell structure ice structure of the present invention as an embodiment of the present invention. Specific details for implementing the invention

[0043] The present invention will be described in detail below.

[0044] The present invention provides a fire suppression method comprising the steps of: manufacturing an ice structure (100) having a core-shell structure including a core (110) containing water and an ice shell (120) as illustrated in FIG. 1; and dropping the ice structure (100) onto a fire site.

[0045] In one embodiment of the present invention, the core-shell structure ice structure (100) may be manufactured by accommodating water in a mold (70) of a predetermined shape and spraying liquid nitrogen onto the surface of the water or the outer surface of the mold. At this time, since the shape of the core-shell structure ice structure (100) may not be consistently formed when liquid nitrogen is sprayed onto the surface of the water, it may be preferable to manufacture the core-shell structure ice structure (100) using the mold (70).

[0046] In one embodiment of the present invention, the ice structure may be manufactured by an ice structure manufacturing device (200). As shown in FIG. 1, the ice structure manufacturing device (200) includes an inner mold (50) that holds and contains water and an outer mold (60) located at a distance from the inner mold, and the outer mold (60) is equipped with a liquid nitrogen supply unit (62) that supplies liquid nitrogen to the outer surface of the inner mold. The liquid nitrogen supply unit (62) may be a liquid nitrogen supply port, and the liquid nitrogen supply port may be connected to a liquid nitrogen supply pipe.

[0047] The inner mold (50) is supported by an inner mold support rod (66), and the support rod may maintain a gap between the inner mold (50) and the outer mold (60). However, the gap may also be maintained by another structure that performs a similar function to the support rod (66).

[0048] The above ice structure manufacturing device (200) includes a first mold (70a) and a second mold (70b) that can be separated and combined so as to separate the molded core-shell structure ice structure (100) as shown in FIGS. 1 to 3, and the first mold and the second mold are connected so as to be openable and sealable by a hinge (230), and may further include a locking device (240).

[0049] In one embodiment of the present invention, the liquid nitrogen supply unit (62) may be formed in the form of a supply pipe that supplies liquid nitrogen into a spaced-apart space formed between the inner mold (50) and the outer mold (60).

[0050] Additionally, the liquid nitrogen supply unit (62) may include a plurality of spray nozzles (62a) provided on the inner surface of the outer mold (60) to spray liquid nitrogen onto the outer surface of the inner mold (50). Additionally, it may further include a supply passage for supplying liquid nitrogen to the plurality of spray nozzles (62a). The supply passage for supplying liquid nitrogen may be formed in a space formed outwardly on the outer circumference of the outer mold (60). For example, it may be formed in a space formed between the outer mold (60) and a housing provided elsewhere.

[0051] In one embodiment of the present invention, a Teflon coating layer may be laminated on the inner surface of the inner mold (50) so that the manufactured ice structure can be easily separated.

[0052] In one embodiment of the present invention, the ice structure manufacturing device (200) may further include a water source supply unit (52) that sucks water from a water source and supplies it to an inner mold (50). For example, the water source supply unit (52) may be in the form of a water source supply pipe (52a) that is in communication with the inner mold (50), extends through an outer mold (60), and is exposed outside the mold.

[0053] In one embodiment of the present invention, the ice structure (100) of the core-shell structure may have a thickness of ice constituting the shell of 5 mm to 30 mm, 5 mm to 20 mm, or 5 mm to 10 mm, but is not limited thereto.

[0054] Additionally, the ice structure (100) may, for example, have a maximum length passing through a center point of 8 cm to 30 cm and a minimum length of 8 cm to 30 cm. The ice structure (100) may, for example, be spherical, ellipsoidal, polygonal prismal, or polygonal sphere-shaped, but is not limited thereto.

[0055] The mold of the above ice structure manufacturing device (200) may also have a shape corresponding to the shape of the ice structure.

[0057] In one embodiment of the present invention, the core-shell structured ice structure (100) can be delivered to a fire site individually one by one or in multiples at once. For example, dozens to hundreds of ice structures (100) can be loaded onto an aircraft and transported to a fire site, and delivered toward the flames from above the fire site.

[0058] In addition, as shown in FIGS. 2 and FIGS. 4, it can be delivered to the fire scene by a drone (300).

[0059] In one embodiment of the present invention, the drone (300) is equipped with an ice structure manufacturing device (200) as shown in FIG. 5, and can extinguish a fire by taking water from a water source near the fire site into the ice structure manufacturing device (200) to manufacture an ice structure (100), and dropping the manufactured ice structure onto the fire site in the manner shown in FIG. 3.

[0060] The ice structure manufacturing device (200) equipped in the above-described drone (300) may have the same structure as the ice structure manufacturing device (200) described above, except that it differs only in that general devices for flight are additionally combined.

[0061] The ice structure manufacturing device (200) equipped in the above-mentioned drone (300) has a structure in which the first mold (70a) and the second mold (70b) of the mold (70) are joined (sealed) through a hinge (230) when manufacturing the ice structure, and at this time, they are firmly joined (sealed) by a locking device (240). When the drone reaches the target fire point, as shown in FIG. 3, the locking device (240) is released and the mold is opened with the hinge (230) as an axis, causing the ice structure (100) inside to fall.

[0062] In one embodiment of the present invention, the ice structure manufacturing device (200) may further include a temperature control device (not shown) that maintains the ice structure (100) so that it does not melt and remains intact until it is dropped. The temperature control device may be, for example, a device that controls the temperature by spraying liquid nitrogen at regular intervals. However, it is not limited thereto.

[0063] In one embodiment of the present invention, the temperature control device may further include a heater (not shown) capable of heating the core-shell structured ice structure (100) so that it can be easily removed from the mold. The heater may include, for example, resistance heating wires arranged at regular intervals on the outer surface of the inner mold (50).

[0064] In one embodiment of the present invention, the fire suppression method may further include a control system (not shown) that controls a drone to fly autonomously to the coordinates of a fire occurrence, as illustrated in FIG. 4, and controls a plurality of drones in a cluster. The control system may be located at a ground control center or may be provided on a separate flying vehicle.

[0065] In one embodiment of the present invention, the control system may be provided in a separate manned / unmanned aircraft (controller) equipped with communication and control equipment, as shown in FIG. 4.

[0066] In one embodiment of the present invention, the control system may control the drone by receiving real-time fire data from a thermal imaging camera equipped on the aircraft, as shown in FIG. 4. In addition, in one embodiment of the present invention, the control system may control the drone by receiving real-time fire data from a thermal imaging camera equipped on each drone.

[0067] The core-shell structure ice structure (100) of the present invention, as shown in FIG. 5, when dropped into a fire area, the shell is broken by a high kinetic energy impact and the water contained in the core is sprayed radially to suppress the fire.

[0068] The present invention

[0069] An ice structure (100) with a core-shell structure for fire suppression can be provided. The ice structure comprises a core (110) containing water and an ice shell (120), as shown in FIG. 1.

[0070] In one embodiment of the present invention, the ice structure (100) of the core-shell structure may have a thickness of ice constituting the shell of 5 mm to 30 mm, 5 mm to 20 mm, or 5 mm to 10 mm, but is not limited thereto.

[0071] Additionally, the ice structure (100) may have a maximum length passing through the central axis of, for example, 8 cm to 30 cm. The ice structure (100) may be, for example, spherical, elliptical, polygonal prismal, or polygonal sphere-shaped, but is not limited thereto.

[0072] The structures of the liquid nitrogen supply unit, water source supply unit, etc., have not been described in particular detail above. However, such configurations can be constructed according to structures known in the art. For example, the liquid nitrogen supply unit may include a liquid nitrogen chamber for receiving liquid nitrogen, a liquid nitrogen supply pipe connecting the liquid nitrogen chamber and the liquid nitrogen injection nozzle, etc., and the water source supply unit may include a configuration such as an electric pump and piping capable of drawing water from a water source.

[0073] In addition, the structure of the drone, the control system for controlling the drone, etc., may also follow the configurations known in this field.

[0075] Embodiments of the present invention will be described in more detail below with examples.

[0076] Example 1: Manufacturing of an ice structure by drone operation

[0077] When a river or reservoir within a radius of 500m is identified at the fire site, the drone absorbs about 2L of water using an ice structure manufacturing device equipped on the drone and injects it into an inner mold, and sprays liquid nitrogen onto the outer surface of the inner mold to form a shell with a thickness of about 5 to 10mm by instantaneous freezing, thereby manufacturing a core-shell structure ice structure.

[0079] Example 2: Drone Swarm Operation

[0080] Ten to fifty drones form a swarm to drop ice structures at multiple points in a fire zone simultaneously or sequentially. A command aircraft analyzes points with intense flames in real time using a thermal imaging camera and assigns priority drop coordinates to individual drones. After dropping the ice structures, each drone autonomously moves to a nearby water source to draw in water, refurbishes the ice structures, and repeats the cycle of delivering them to the fire site.

[0081] The drone drops an ice structure from 30 to 50 meters above the fire source, and the ice structure hits the target point, bursts, and releases water.

[0083] The present invention has been described above through an embodiment thereof. However, the above embodiment is intended to explain the invention more specifically, and the scope of the invention is not limited by the above embodiment. The above embodiment may be appropriately modified or changed by those skilled in the art within the scope of the invention. Explanation of the symbols

[0085] 50: Inner mold 52: Water supply unit 52a: Water supply pipe, 60: External mold 62: Liquid nitrogen supply unit 62a: Spray nozzle 66: Internal mold support rod 70: Mold 70a: First mold 70b: 2nd Mold 100: Core-shell structured ice structure 110: Core 120: Shell 200: Ice structure manufacturing device 230: Hinge 240: Locking device 300: Drone

Claims

Claim 1 A fire suppression method comprising: a step of manufacturing an ice structure having a core-shell structure including a core containing water and an ice shell; and a step of dropping the ice structure at a fire site; wherein the ice structure having a core-shell structure is delivered to a fire site by a drone, and the drone is equipped with an ice structure manufacturing device, and water is taken from a water source near the fire site to the ice structure manufacturing device to manufacture the ice structure, and the manufactured ice structure is dropped at the fire site. Claim 2 A fire suppression method according to claim 1, characterized in that the core-shell structured ice structure is manufactured by accommodating water in a mold of a predetermined shape and spraying liquid nitrogen onto the surface of the water or the outer surface of the mold. Claim 3 delete Claim 4 delete Claim 5 A fire suppression method according to claim 1, wherein the ice structure manufacturing device comprises an inner mold that contains and holds water and an outer mold located at a distance spaced from the inner mold, the outer mold is provided with a liquid nitrogen supply unit that supplies liquid nitrogen to the outer surface of the inner mold, the ice structure manufacturing device comprises a first mold and a second mold that can be separated and combined to separate a molded core-shell structure ice structure, the first mold and the second mold are connected to be openable and sealable by a hinge, and further comprises a locking device. Claim 6 A fire suppression method according to claim 5, characterized in that the liquid nitrogen supply unit comprises a plurality of spray nozzles provided on the inner surface of an outer mold to spray liquid nitrogen onto the outer surface of an inner mold. Claim 7 A fire suppression method according to claim 5, wherein the ice structure manufacturing device further comprises a water source supply unit that sucks water from a water source and supplies it to an internal mold. Claim 8 A fire suppression method according to claim 7, characterized in that the water supply unit is connected to an inner mold and is a water supply pipe that extends through an outer mold and is exposed outside the mold. Claim 9 A fire suppression method according to claim 5, wherein the ice structure manufacturing device further comprises a temperature control device that maintains the ice structure so that it does not melt and remains intact until it is dropped. Claim 10 A fire suppression method according to claim 9, wherein the temperature control device further comprises a heater capable of heating the core-shell structured ice structure so that it can easily detach from the mold. Claim 11 A fire suppression method according to claim 1, characterized in that the fire suppression method further includes a control system that controls a drone to fly autonomously to the coordinates of a fire occurrence and controls a plurality of drones in a cluster. Claim 12 A fire suppression method according to claim 11, characterized in that the control system is provided on a drone and a separate aircraft. Claim 13 A fire suppression method according to claim 12, characterized in that the control system receives real-time fire data from a thermal imaging camera equipped on the aircraft and controls the drone. Claim 14 A fire suppression method according to claim 12, characterized in that the control system receives real-time fire data from a thermal imaging camera equipped on each drone and controls the drone. Claim 15 delete

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