Fire extinguishing bombs

Abstract

The present invention relates to a fire extinguishing projectile. A fire extinguishing projectile according to one embodiment of the present invention comprises: a head portion including a distance sensor portion, a temperature sensor portion, and a control device; a main body portion including a fire extinguishing liquid storage portion for storing fire extinguishing liquid and a fire extinguishing liquid spraying device for spraying the fire extinguishing liquid to the outside; and a propulsion portion including a propellant fuel used for launching. The control device comprises a fire extinguishing control portion and an attitude sensor portion, and the fire extinguishing liquid spraying device comprises a fire extinguishing wing located inside the main body portion and protruding to the outside of the main body portion when the fire extinguishing liquid is sprayed. The main body portion may include a configuration in which it rotates by the pressure of the fire extinguishing liquid being sprayed to the outside through the fire extinguishing wing.

Description

Technology Field

[0001] The present invention relates to a fire extinguishing projectile. More specifically, it relates to a fire extinguishing projectile that automatically sprays a fire extinguishing liquid to extinguish a fire when thrown into a flame by a mortar, howitzer, or by a person. Background Technology

[0002] Recently, the occurrence of wildfires in Korea has been increasing, and the affected area is also expanding.

[0003] A total of 740 wildfires occurred during the year 2022, damaging an area of ​​approximately 24,782 hectares.

[0004] Among the wildfires of 2022, the East Coast wildfire that started on March 7 lasted for four days, damaging approximately 19,553 hectares of forest, and was recorded as the second largest wildfire in history since the wildfire that occurred in the East Coast region in 2000.

[0005] These statistics demonstrate the severity of wildfires and highlight the importance of prevention and suppression. In particular, wildfires not only destroy forests but also disrupt ecosystems, cause climate change, and threaten human lives and property.

[0006] Generally, when a wildfire occurred, firefighting personnel had to be mobilized and dispatched directly to the scene of the fire, and the mobilized firefighting personnel carried out firefighting using conventional firefighting equipment such as fire rakes, fire blowers, sickles, hoes, shovels, and backpack pumps.

[0007] However, the reality was that it was difficult to suppress the fire in its early stages with existing equipment, making initial firefighting operations impossible. Furthermore, there was a problem where wildfires spread over a wide area by the time firefighters reached the burning zone, making suppression difficult and occasionally resulting in greater damage.

[0008] Because these wildfires travel on the wind and destroy forests, the damage is very severe if they are not quickly suppressed in the early stages.

[0009] However, since fire trucks cannot enter the fire site where the wildfire occurs, there is the inconvenience of firefighters having to transport heavy firefighting equipment to the site to extinguish the fire themselves.

[0010] To solve these problems, firefighting helicopters that spray fire extinguishing agents from the air have been developed, but in areas with rugged terrain and strong winds, the fire extinguishing agents sprayed from the air cannot properly reach the fire site, and there is a problem where flames and smoke obstruct the firefighting helicopter's visibility due to updrafts caused by wildfires. Prior art literature

[0011] Korean Registered Patent No. 10-1037659 The problem to be solved

[0012] The technical problem that the present invention aims to solve is to provide a fire extinguishing bomb capable of effectively extinguishing a fire while maintaining a certain distance, without jumping into or approaching the fire scene.

[0013] The technical problem that the present invention aims to solve is to provide a fire extinguishing projectile capable of increasing extinguishing efficiency by spraying a fire extinguishing liquid just before it lands near a flame area while flying in a parabolic trajectory.

[0014] The technical problem that the present invention aims to solve is to provide a fire extinguishing bomb that can extinguish a surrounding fire by detonating the explosive contained therein when the fire extinguishing liquid spraying device is not operating after it is dropped at a fire scene, thereby scattering the fire extinguishing liquid in all directions by the explosive force.

[0015] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0016] A fire extinguishing projectile according to one embodiment of the present invention for achieving the above technical problem comprises: a head portion including a distance sensor portion, a temperature sensor portion, and a control device; a main body portion including a fire extinguishing liquid storage portion in which fire extinguishing liquid is stored and a fire extinguishing liquid spraying device for spraying the fire extinguishing liquid to the outside; and a propulsion portion including a propellant fuel used for firing. The control device comprises a fire extinguishing control portion and an attitude sensor portion, and the fire extinguishing liquid spraying device comprises a fire extinguishing wing located inside the main body portion and protruding to the outside of the main body portion when the fire extinguishing liquid is sprayed. The main body portion may include a configuration in which it rotates by the pressure of the fire extinguishing liquid being sprayed to the outside through the fire extinguishing wing. Effects of the invention

[0017] According to the present invention as described above, fire extinguishing projectiles can be fired using a mortar, and there is an effect of extinguishing fires in mountainous terrain that are difficult for people to access.

[0018] In addition, according to the present invention as described above, the fire extinguishing projectile rotates due to the pressure of the extinguishing liquid being sprayed, and lift is generated by the shape of the extinguishing wing, thereby providing the effect of spraying the extinguishing liquid in the air for a longer period of time. Brief explanation of the drawing

[0019] FIG. 1 is a perspective view of a fire extinguishing projectile according to one embodiment of the present invention. FIG. 2 is a right side view of a fire extinguishing projectile according to one embodiment of the present invention. FIG. 3 is a drawing illustrating the shape of a fire extinguishing wing according to one embodiment of the present invention. FIG. 4 is a plan view of a fire extinguishing bomb with deployed fire extinguishing wings according to one embodiment of the present invention. FIG. 5 is a rear view of a fire extinguishing bomb with unfolded fire extinguishing wings according to one embodiment of the present invention. FIG. 6 is an example illustrating the rotation of a fire extinguishing bullet according to the spraying of a fire extinguishing liquid, according to one embodiment of the present invention. FIG. 7 is an example illustrating the lift of a firefighting wing according to one embodiment of the present invention. FIG. 8 is an internal configuration diagram of a fire extinguishing bomb with deployed fire extinguishing wings according to one embodiment of the present invention. FIG. 9 is a configuration diagram of a control device according to one embodiment of the present invention. FIG. 10 is an example of utilizing a fire extinguishing projectile using a mortar according to one embodiment of the present invention. FIG. 11 is an example of a fire extinguishing bomb spraying fire extinguishing liquid while falling from the air, according to one embodiment of the present invention. FIG. 12 is an example of a fire extinguishing grenade spraying fire extinguishing liquid into a flame according to one embodiment of the present invention. FIG. 13 is an example of a signal output of a recovery signal generating device according to one embodiment of the present invention. FIG. 14 is an example of a fire extinguishing bullet containing explanatory text according to one embodiment of the present invention. Specific details for implementing the invention

[0020] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0021] Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning that is commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0022] FIGS. 1 and 2 are a perspective view and a right side view of a fire extinguishing projectile according to an embodiment of the present invention. The appearance of the fire extinguishing projectile will be described with reference to FIGS. 1 and 2.

[0023] A fire extinguishing projectile (10) according to one embodiment of the present invention may include a head portion (100), a main body portion (200), and a propulsion portion (500).

[0024] The head unit (100) may include a distance sensor unit (110) and a temperature sensor unit (120). The distance sensor unit (110) may include a sensor that outputs a distance value measured from the fire extinguishing bomb (10) to the ground. The temperature sensor unit (120) may include a sensor that outputs a temperature value measured from the ambient temperature of the fire extinguishing bomb (10).

[0025] As illustrated in FIG. 1, the distance sensor unit (110) and the temperature sensor unit (120) are arranged to protrude outside the head unit (100), but this is merely an example and the present invention is not limited thereto.

[0026] According to another embodiment of the present invention, the distance sensor unit (110) and the temperature sensor unit (120) may be located inside the head unit (100) or inside or outside the main body unit (200).

[0027] The head portion (100) may be in the shape of a cone or an ellipse, but this is merely an example and is not limited thereto.

[0028] The main body (200) may include a fire extinguishing liquid spraying device (300) on its outer surface. The fire extinguishing liquid spraying device (300) may be formed on the outer surface in a direction that forms an acute angle or a right angle with respect to the longitudinal direction of the fire extinguishing bomb (10). For convenience of explanation below, the fire extinguishing liquid spraying device (300) is described as being formed in a direction perpendicular to the longitudinal direction of the fire extinguishing bomb (10), but this is merely an example and is not limited thereto.

[0029] The fire extinguishing liquid spraying device (300) may include one or more grooves formed on the outer surface. The fire extinguishing liquid spraying device (300) may include fire extinguishing wings (310, 320, 330) inside the grooves. The fire extinguishing wings (310, 320, 330) may be positioned inside the grooves in a folded state.

[0030] The fire extinguishing blades (310, 320, 330) can be drawn out of the groove when the fire extinguishing bomb (10) approaches the fire point, and at this time, the fire extinguishing liquid can be sprayed out through the fire extinguishing blades (310, 320, 330).

[0031] The propulsion unit (500) may include a propulsion fuel to generate propulsion when the fire extinguishing projectile (10) is fired using a mortar or howitzer.

[0032] The propulsion unit (500) may be identical to the propellant of a mortar shell. When the propulsion unit (500) is inserted into the muzzle of a mortar, it free-falls under its own weight and strikes the firing pin on the ground, and can be fired by the pressure resulting from the explosion of the propellant fuel.

[0033] The above propellant fuel may include the explosive charge of a mortar shell.

[0034] The amount of propulsion fuel included in the propulsion unit (500) can be determined based on the distance from the fire point.

[0035] FIG. 3 is a drawing illustrating the shape of a fire extinguishing wing according to an embodiment of the present invention. FIG. 4 and FIG. 5 are a plan view and a rear view, respectively, of a fire extinguishing bomb with the fire extinguishing wing deployed according to an embodiment of the present invention. The fire extinguishing wing will be described with reference to FIG. 3 to FIG. 5.

[0036] Referring to FIG. 3, the cross-section of the firefighting wing (310) may be similar to that of an airplane wing. The width of the vertical cross-section of the firefighting wing (310) may be shaped such that the width decreases again from the front to the rear. This shape of the firefighting wing (310) may be a structure for generating lift according to the airflow.

[0037] The fire extinguishing wing (310) may include a spray nozzle (315) through which the fire extinguishing liquid is sprayed outward. The spray nozzle (315) may be located on the inclined surface of the rear of the fire extinguishing wing (310).

[0038] The fire extinguishing bomb (10) may include N fire extinguishing wings equal to or greater than 2, and the N fire extinguishing wings may be positioned on the outer surface of the main body (200) at an angle interval of 360 / N.

[0039] Referring to FIGS. 4 and 5, a fire extinguishing bomb (10) according to one embodiment of the present invention may include four fire extinguishing wings (310, 320, 330, 340). Each fire extinguishing wing (310, 320, 330, 340) may be arranged at 90-degree intervals on the outer surface of the fire extinguishing bomb (10). This is merely an example and is not limited thereto.

[0040] The fire extinguishing wings (310, 320, 330, 340) can be positioned in the inner groove of the fire extinguishing liquid spraying device (300) and can be deployed outward when falling to the fire scene.

[0041] For example, the fire extinguishing wings (310, 320, 330, 340) can be deployed by an elastic device (spring, clip, etc.) or a hydraulic device to spread out from the inside to the outside when dropped at the fire scene.

[0042] As another example, the fire extinguishing wings (310, 320, 330, 340) may include a structure that unfolds outward from the surface of the main body (200) when approaching a fire scene while folded inside the surface of the main body (200).

[0043] Referring to FIG. 5, the first fire extinguishing wing (310) extends from the bottom upward and may include a first spray nozzle (315) positioned in the downward direction. The second fire extinguishing wing (320) extends from the left to the right and may include a second spray nozzle (325) positioned in the left direction. The third fire extinguishing wing (330) extends from the top downward and may include a third spray nozzle (335) positioned in the upward direction. The fourth fire extinguishing wing (340) extends from the right upward and may include a fourth spray nozzle (345) positioned in the right direction.

[0044] FIG. 6 is an example illustrating the rotation of a fire extinguishing projectile due to the spraying of a fire extinguishing liquid according to an embodiment of the present invention. FIG. 7 is an example illustrating the lift of a fire extinguishing wing according to an embodiment of the present invention. The rotation of the fire extinguishing wing will be explained with reference to FIGS. 6 and 7.

[0045] When the extinguishing liquid (390) is sprayed from the spray nozzles (315, 325, 335, 345), a force may be applied to the extinguishing blades (310, 320, 330, 340) in the opposite direction to the spraying direction due to the spray pressure. Due to the force generated by the spray pressure, the main body of the extinguishing bomb (10) may be rotated.

[0046] When the extinguishing liquid (390) is sprayed downward from the first spray nozzle (315) of the first extinguishing wing (310), the first extinguishing wing (310) can receive a force acting in an upward direction.

[0047] In this way, force is applied to the first fire extinguishing wing (310) in the upward direction, the second fire extinguishing wing (310) in the right direction, the third fire extinguishing wing (330) in the downward direction, and the fourth fire extinguishing wing (340) in the left direction, and the fire extinguishing bomb (10) can be rotated counterclockwise with respect to the center of the main body.

[0048] Referring to Fig. 7, when the fire extinguishing wing rotates, lift is applied to the fire extinguishing wing in an upward direction due to the difference in airflow speed between the lower and upper parts of the wing. This can be generated by the same principle as the lift generated on an airplane wing.

[0049] The lift generated by the extinguishing blades (310, 320, 330, 340) due to the rotation of the extinguishing bomb (10) caused by the spraying of the extinguishing liquid (390) can reduce the falling speed of the falling extinguishing bomb (10). When the falling speed of the extinguishing bomb (10) is reduced, the extinguishing bomb (10) can remain in the air for a longer time, and accordingly, the time during which the extinguishing liquid (390) is sprayed in the air can be increased. If the spraying time of the extinguishing liquid (390) is increased, it may have the effect of extinguishing the fire more effectively.

[0051] FIG. 8 is an internal configuration diagram of a fire extinguishing bomb with deployed fire extinguishing wings according to one embodiment of the present invention. With reference to FIG. 8, the internal configuration of the fire extinguishing bomb (10) will be described.

[0052] The head unit (100) may include a distance sensor unit (110), a temperature sensor unit (120), a counterweight (190), and a control device (130).

[0053] The counterweight (190) can balance the fire extinguishing projectile (10) so that the head portion (100) faces downward when the fire extinguishing projectile (10) falls. The weight of the counterweight (190) can be determined based on the weight of the fire extinguishing liquid, the firing distance, etc.

[0054] The counterweight (190) is located at the top of the head portion (100) and may be detachable.

[0055] For example, the counterweight (190) may be located at the top of the head portion (100) and may be replaced with another weight, but this is merely an example and is not limited thereto.

[0056] The main body (200) may include a fire extinguishing liquid storage unit (210) and a fire extinguishing liquid spraying device (300).

[0057] The digestive fluid storage unit (210) may include a space where the digestive fluid can be stored.

[0058] The above-mentioned extinguishing agent may include water, carbon dioxide, or halogen compounds (halon 104, halon 1011, halon 2402, halon 1301, etc.), but this is merely an example and is not limited thereto.

[0059] The fire extinguishing liquid spraying device (300) may include a fire extinguishing liquid pumping device (350), a fire extinguishing liquid supply pipe (302, 304, 306), and a fire extinguishing blade (310, 330). Although not shown in FIG. 8, the fire extinguishing liquid spraying device (300) may further include a fire extinguishing blade (320, 340) and a fire extinguishing liquid supply pipe (308). The fire extinguishing liquid supply pipe (302, 304, 306, 308) may each be connected between the fire extinguishing blade (310, 320, 330, 340) and the fire extinguishing liquid pumping device (350).

[0060] The fire extinguishing liquid pump device (350) can pump the fire extinguishing liquid stored in the fire extinguishing liquid storage unit (210) and supply it to the fire extinguishing liquid supply pipes (302, 304, 306).

[0061] The fire extinguishing fluid pump device (350) can supply fire extinguishing fluid to the first fire extinguishing wing (310) through the first fire extinguishing fluid supply pipe (302). The fire extinguishing fluid pump device (350) can supply fire extinguishing fluid to the second fire extinguishing wing (320) through the second fire extinguishing fluid supply pipe (304). The fire extinguishing fluid pump device (350) can supply fire extinguishing fluid to the third fire extinguishing wing (330) through the third fire extinguishing fluid supply pipe (304). The fire extinguishing fluid pump device (350) can supply fire extinguishing fluid to the fourth fire extinguishing wing (340) through the fourth fire extinguishing fluid supply pipe (308, not shown).

[0062] The propulsion unit (500) may include propulsion fuel (510) and a recovery signal generator (400).

[0063] The propellant fuel (510) may contain the same charge as a mortar shell.

[0064] The recovery signal generating device (400) can generate a recovery signal indicating the location of the fire extinguishing bomb (10). The recovery signal may include a radio signal, a sound signal, or a light signal, but this is merely an example and is not limited thereto.

[0065] The recovery signal generating device (400) can output the recovery signal to inform a user who wishes to recover the fire extinguishing bomb (10) of the location of the fire extinguishing bomb (10) after the fire extinguishing bomb (10) has completed its fire extinguishing function at the fire site.

[0066] The recovery signal generating device (400) may be located inside or outside the propulsion unit (500) so that the recovery signal can be transmitted to the outside.

[0067] According to another embodiment of the present invention, the recovery signal generating device (400) may be located in the main body part (200) or the head part (100).

[0068] When the recovery signal generating device (400) receives a notification signal from the control device (130), it can output the recovery signal.

[0069] For example, the recovery signal may be a radio frequency having a predetermined frequency and signal strength, and a user who wishes to recover the fire extinguishing bomb (10) can recover the fire extinguishing bomb (10) dropped at the fire scene by tracking the radio signal.

[0070] As another example, the retrieval signal may be a specific sound that is predetermined, and a user who wishes to retrieve the fire extinguisher (10) may follow the sound and retrieve the fire extinguisher (10) that fell at the fire scene.

[0071] As another example, the recovery signal may be a specific light that is predetermined, and a user who wishes to recover the fire extinguisher (10) may follow the light to recover the fire extinguisher (10) that fell at the fire scene.

[0072] FIG. 9 is a configuration diagram of a control device according to an embodiment of the present invention. With reference to FIG. 9, a control device (130) of a fire extinguishing bomb (10) will be described.

[0073] The control device (130) may include a communication unit (136), a GPS receiver (138), an attitude sensor unit (134), and a fire control unit (132).

[0074] The communication unit (136) can connect to communication via wired or wireless means.

[0075] For example, the communication unit (136) may include a module that communicates with the outside based on Ethernet, serial connection, WiFi, Bluetooth, 3G, 4G, LTE, 5G, or LoRa, but this is merely an example and is not limited thereto.

[0076] The GPS receiver (138) can receive a GPS (global positioning server) signal and output the current location coordinates.

[0077] The posture sensor unit (134) can output a posture value indicating whether the fire extinguisher is in an upright state or a lying state.

[0078] The fire extinguishing control unit (132) can receive a set value including a fire extinguishing start height or a fire extinguishing start temperature through the communication unit (136).

[0079] The fire control unit (132) can receive the location coordinates from the GPS receiver (138) and can transmit the location coordinates to the outside through the communication unit (136).

[0080] A user who intends to retrieve the fire extinguishing bomb (10) can receive the location coordinates through a communication connection with the communication unit (136), and can determine the location of the fire extinguishing bomb (10) based on the location coordinates and retrieve the fire extinguishing bomb (10).

[0081] The fire extinguishing control unit (132) can control the fire extinguishing liquid spraying device (300) and the recovery signal generating device (400) based on the output values ​​of the distance sensor unit (110), the temperature sensor unit (120), and the posture sensor unit (134).

[0082] The fire extinguishing control unit (132) can output a spray start signal to the fire extinguishing liquid spraying device (300) when the posture value output from the posture sensor unit (134) indicates that the head unit (100) is facing downward and the distance value from the ground output from the distance sensor unit (110) is smaller than the fire extinguishing start height.

[0083] The above fire extinguishing start height may refer to the distance from the ground where the fire extinguishing liquid is sprayed from the air.

[0084] The above fire extinguishing start height can be determined based on the distance from the ground at which effective fire extinguishing can be achieved when the fire extinguishing liquid is sprayed from the air.

[0085] According to another embodiment of the invention, the fire control unit (132) can output a spray start signal to the fire extinguishing liquid spraying device (300) when the posture value output from the posture sensor unit (134) indicates a lying state and the temperature sensor unit (120) is greater than the fire extinguishing start temperature.

[0086] The above extinguishing start temperature may refer to the ambient temperature of the extinguishing bomb (10) that starts spraying the extinguishing liquid.

[0087] The above extinguishing start temperature can be determined based on the temperature at which a fire is judged to be present around the extinguishing bomb (10).

[0088] When the fire extinguishing liquid spraying device (300) receives the spraying start signal, it can deploy the fire extinguishing blades (310, 320, 330, 340) to the outside and operate the fire extinguishing liquid pump device (350) to spray the fire extinguishing liquid to the outside through the spray nozzles (315, 325, 335, 345).

[0089] The fire extinguishing control unit (132) can output a notification signal to the recovery signal generating device (400) to output a signal for the recovery of the fire extinguishing bomb (10).

[0090] According to one embodiment of the invention, when the fire extinguishing control unit (132) outputs the fire extinguishing start signal to the fire extinguishing liquid injection device (300), it can output a notification signal to the recovery signal generating device (400).

[0091] According to another embodiment of the invention, when the fire control unit (132) receives a spray completion signal from the fire extinguishing liquid spraying device (300), it can output the notification signal to the recovery signal generating device (400).

[0092] According to another embodiment of the invention, the fire control unit (132) can output a notification signal to the recovery signal generating unit (400) after a predetermined waiting time following the output of the fire start signal to the fire extinguishing liquid injection device (300).

[0093] FIG. 10 is an example of utilizing a fire extinguishing projectile using a mortar according to one embodiment of the present invention.

[0094] Referring to FIG. 10, when a fire extinguishing projectile (10) is inserted into the muzzle of the mortar (600), the propellant fuel of the propulsion unit (500) explodes and the fire extinguishing projectile (10) can be fired.

[0095] By firing a fire extinguishing bomb (10) using a mortar (600), a fire that has occurred in a place that is difficult for people to access can be extinguished. For example, in the case of a forest fire, a fire extinguishing bomb (10) can be fired at the location of the forest fire to extinguish it.

[0096] FIG. 11 is an example of a fire extinguishing bomb spraying fire extinguishing liquid while falling from the air, according to one embodiment of the present invention.

[0097] Referring to FIG. 11, when the fire extinguishing bomb (10) falls close to the fire point, it can spray fire extinguishing liquid based on the distance value output from the distance sensor unit (110). To spray the fire extinguishing liquid, the fire extinguishing blades (310, 320, 330, 304) can be deployed outward, and the fire extinguishing blades (310, 320, 330, 304) and the fire extinguishing bomb (10) can be rotated by the spray pressure of the fire extinguishing liquid. Lift is generated by the rotation, and the time the fire extinguishing bomb (10) stays in the air increases, allowing the fire extinguishing liquid to be sprayed in the air for a longer period.

[0098] FIG. 12 is an example of a fire extinguishing grenade spraying fire extinguishing liquid into a flame according to one embodiment of the present invention.

[0099] Referring to FIG. 11, when the fire extinguishing bomb (10) falls from the air and lands on the ground, or when a person throws the fire extinguishing bomb (10) into the flames, the fire extinguishing bomb (10) is left lying in a high-temperature environment.

[0100] The fire extinguishing projectile (10) may be fired by a mortar, but it may also be thrown into the flames by a person from a short distance. In this case, the distance value measured by the distance sensor unit () cannot be used to determine whether to start spraying, and the temperature value output by the temperature sensor unit () can be used to determine whether to start spraying.

[0101] The fire extinguisher (10) can spray fire extinguishing liquid based on the posture value output from the posture sensor unit (134) and the temperature value output from the temperature sensor unit (120). For example, if the posture value of the fire extinguisher (10) indicates a lying position and the temperature value is higher than the spraying start temperature, the fire extinguisher can spray fire extinguishing liquid by outputting a spraying start signal to the fire extinguishing liquid spraying device (300).

[0102] FIG. 13 is an example of a signal output of a recovery signal generating device according to one embodiment of the present invention.

[0103] Referring to FIG. 13, the fire extinguishing bomb (10) can output a recovery signal through a recovery signal generating device (400).

[0104] The fire extinguishing bomb (10) can output the recovery signal simultaneously with the start of spraying the fire extinguishing liquid. Alternatively, the fire extinguishing bomb (10) can output the recovery signal after a predetermined waiting period following the start of spraying the fire extinguishing liquid. Alternatively, the fire extinguishing bomb (10) can output the recovery signal after the spraying of the fire extinguishing liquid is completed.

[0105] The above recovery signal may include radio waves, sound, or light, but is merely an example and is not limited thereto.

[0106] The fire extinguisher (10) can transmit GPS location coordinates to the outside through the communication unit (136). A user who wishes to retrieve the fire extinguisher (10) can determine the exact location of the fire extinguisher (10) using the retrieve signal and the location coordinates, and retrieve the fire extinguisher (10).

[0107] FIG. 14 is an example of a fire extinguishing bullet containing explanatory text according to one embodiment of the present invention.

[0108] Referring to FIG. 14, an explanatory text (50) may be attached to the outside of the fire extinguishing bomb (10).

[0109] The fire extinguishing projectile (10) may have a shape similar to a mortar shell, and a description (50) to distinguish it from the shell may be located on the outer surface of the fire extinguishing projectile (10).

[0110] The description (50) shown in FIG. 14 is an example, and the present invention is not limited thereto.

[0111] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. Explanation of the symbols

[0112] 10 fire extinguishing grenades Head section 100 Main body 200 Fire extinguishing liquid sprayer 300 Recovery signal generator 400 Promotion Department 500

Claims

Claim 1 A fire extinguishing projectile comprising: a head unit including a distance sensor unit, a temperature sensor unit, and a control device; a main body unit including a fire extinguishing liquid storage unit for storing fire extinguishing liquid and a fire extinguishing liquid spraying device for spraying said fire extinguishing liquid to the outside; and a propulsion unit including propellant fuel used for launching; wherein the control device includes a fire extinguishing control unit and an attitude sensor unit, and the fire extinguishing liquid spraying device includes a fire extinguishing wing located inside the main body unit and protruding to the outside of the main body unit when said fire extinguishing liquid is sprayed, and the main body unit rotates by the pressure of said fire extinguishing liquid being sprayed to the outside through said fire extinguishing wing, and said fire extinguishing wing includes a spray nozzle through which said fire extinguishing liquid is sprayed, and has a shape in which the width of the vertical cross-section increases from the front to the rear and then decreases again, and has a structure that generates lift when it moves in the forward direction by the pressure of said sprayed fire extinguishing liquid. Claim 2 A fire extinguishing bomb according to claim 1, wherein the fire extinguishing control unit outputs a spray start signal to the fire extinguishing liquid spraying device when the attitude value output from the attitude sensor unit indicates that the head unit is facing downward and the distance value from the ground output from the distance sensor unit is smaller than the fire extinguishing start height. Claim 3 A fire extinguishing bomb according to claim 1, wherein the fire extinguishing control unit outputs a spray start signal to the fire extinguishing liquid spraying device when the posture value output from the posture sensor unit indicates a lying state and the temperature value output from the temperature sensor unit is greater than a predetermined fire extinguishing start temperature. Claim 4 In claim 1, the fire extinguishing liquid spraying device further comprises a fire extinguishing liquid pumping device and a fire extinguishing liquid supply pipe, wherein the fire extinguishing liquid pumping device pumps fire extinguishing liquid from the fire extinguishing liquid storage unit and supplies it to the fire extinguishing liquid supply pipe, and the fire extinguishing blade sprays the fire extinguishing liquid in a rearward direction when the fire extinguishing liquid is supplied from the fire extinguishing liquid supply pipe, a fire extinguishing bomb for extinguishing fires. Claim 5 delete Claim 6 A fire extinguishing bomb according to claim 1, wherein the control device further includes a communication unit capable of wireless communication, and the fire extinguishing control unit is capable of receiving set values ​​including a fire extinguishing start height and a fire extinguishing start temperature through the communication unit. Claim 7 In paragraph 6, the control device comprises a GPS receiver that receives a GPS (global positioning system) signal and outputs current location coordinates; and the fire extinguishing control unit transmits the location coordinates to the outside using the communication unit, for a fire extinguishing bomb. Claim 8 A fire extinguishing bomb according to claim 1, further comprising a recovery signal generating device that generates a recovery signal indicating a location; wherein the fire extinguishing control unit outputs a notification signal to the recovery signal generating device when outputting a fire extinguishing start signal to the fire extinguishing liquid spraying device, and the recovery signal generating device outputs the recovery signal when the notification signal is received, and the recovery signal includes a predefined radio signal, sound signal, or light signal. Claim 9 In claim 1, the propulsion unit is a fire extinguishing projectile that generates propulsion by colliding with a firing pin on the ground and exploding the propulsion fuel when the fire extinguishing projectile is placed into the muzzle of a mortar or howitzer.

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