KR102597610B1 - Multifunctional drone for fire fighting - Google Patents

Abstract

The present invention relates to a firefighting drone that is equipped with fire extinguishing liquid injection technology and can approach and suppress a fire scene unmanned and remotely. It is equipped with a power module for flight and a fire extinguishing liquid processing module for fire suppression and can be operated on the ground. We provide a multi-functional fire drone that receives fire extinguishing fluid stored in the vehicle and sprays the fire extinguishing fluid at the fire site.

Description

MULTIFUNCTIONAL DRONE FOR FIRE FIGHTING}

The present invention relates to drones and fire suppression technology, and more specifically, to a firefighting drone equipped with fire extinguishing liquid injection technology that can unmanned and remotely approach the ignition source and suppress the fire scene.

A drone is an unmanned aerial vehicle (UAV) shaped like an airplane or helicopter that can fly and control without a pilot. In order to perform a certain mission, the drone is controlled remotely from the ground without a pilot on board, or the drone flies on its own by recognizing and judging the surrounding environment using a pre-entered mission program. In order to control these drones easily and conveniently, various technologies such as hovering function and origin return function are continuously being developed.

Initially, it was used by the military to prepare for war for purposes such as surveillance, reconnaissance, and attack. In recent years, due to the development of the above technology, the scope of application has rapidly expanded to industrial and civilian use, with civilian demand exceeding military demand. It is expected that Currently, the scope of its use is gradually expanding to private and public fields such as broadcast filming, recreation, agriculture, communication relay, disaster information collection for polluted and natural disaster areas, and delivery logistics fields. It is possible to apply it to these fields. It is being developed in various forms. In addition, the civilian drone market is expected to become more active in the future as low-cost drones that are easy to operate and can be controlled with a smartphone using an app are being released.

One of the application areas of these drones is fire suppression, which is receiving attention. Since drones can fly unmanned, if they can be used at fire sites, it will be possible to extinguish fires in high-rise buildings or dangerous areas that are difficult to enter without the input of firefighters.

Korean Patent Publication No. 10-1437323 discloses a conventional unmanned aerial vehicle for fire suppression, and Figure 1 is a perspective view of it.

Specifically, it consists of a flight unit (10), a fire suppression unit (20), a camera transmission unit (30), and a control unit (40), and the fire suppression unit (20) is used for fire suppression at the fire site. As provided, for example, it can be mounted on the lower surface of the main body 12 of the flight unit 10. This fire suppression unit 20 has a storage space inside and sprays fire extinguishing solution and first and second tanks having spherical fire extinguishing solution ampoules at the lower part of the front surface of the unmanned aerial vehicle 100. It may have a spray nozzle for

Drones for fire suppression are different from other drone application fields in that they must be close to a high-temperature environment and must have a structure and storage container for spraying fire extinguishing liquid. When approaching a fire environment, overheating of the control panel and motor can easily occur due to the heat, which can lead to loss of control. In addition, even if high-efficiency extinguishing liquid is stored in an ampoule type as in the prior art described above, there is a problem of increasing the volume and weight because it must have a container, bracket, and extinguishing liquid injection structure to store it. The increase in weight for mounting firefighting equipment ultimately leads to inefficiency by requiring larger motors and blade structures.

Additionally, due to the unstable nature of the drone, there were limitations in spraying the exact amount of fire extinguishing fluid to the detected ignition source.

The present invention was developed to overcome the problems of the prior art described above. It is possible to spray fire extinguishing fluid remotely using a drone, but it can increase the precision of control, is adaptable to high-temperature environments, and allows long-time flights and spraying of fire extinguishing fluid. The purpose is to provide a multi-functional fire drone that can dramatically improve the efficiency of fire suppression.

The present invention for solving the above problems includes a main body 2100 having a controller unit operated by receiving power from the operating vehicle 100 through the power line 300; A plurality of blade modules (2400) connected to the main body by an arm portion (2300) and having motors and blades; A fire extinguishing liquid processing unit 2200 coupled to the main body 2100 and connected to an operating vehicle through a fire extinguishing liquid transfer line 200; A direct injection nozzle (2210) that extends in the direction selected from the fire extinguishing fluid processing unit and discharges the extinguishing fluid so as to have directionality; An arm side nozzle (2220) disposed on the arm adjacent to the blade module and discharging fire extinguishing liquid downward; A multi-functional fire fighting device including a bridge portion 2310 that connects adjacent arm portions to each other, and the blade module is provided with a blower portion 2430 that prevents overheating of the motor through a cooling flow that sucks in external air from the side and generates an axial flow. We provide drones.

It may further include a leg part 2500 that connects the main body and the fire extinguishing liquid treatment unit and supports it on the ground, and a connecting end 2201 that is coupled to the leg part and allows the fire extinguishing liquid transfer line to be detachable.

In addition, it is preferable to further include a bridge portion 2310 that connects adjacent arm portions to each other to prevent vibration and distortion.

In an additional embodiment, the arm portion has a flow path inside which the digestive fluid from the digestive fluid processing unit is transmitted, and the bridge portion may perform a function of communicating to distribute the digestive fluid between the arm portions.

In addition, the blower part may function as a spray flow that guides the fire extinguishing liquid discharged from the arm side nozzle downward.

Meanwhile, it is desirable to further include a camera unit 2111 that generates visible light images and heat detection images of the fire scene.

If the controller determines that navigation is impossible, it may further include a parachute 2600 that is deployed and functions to enable recovery.

According to the configuration of the present invention described above, the fire drone and the operating vehicle are connected as one set, ensuring mobility and enabling continuous supply of fire extinguishing liquid and power, thereby enabling operation for long-term fire suppression.

Therefore, it is possible to make the flying part lighter and more compact, which is economical and allows the fire extinguishing liquid to be sprayed in an effective manner at the desired location, which has the effect of effectively preventing the spread of fire and extinguishing it in places that are difficult for people or equipment to access. .

Figure 1 is a perspective view of a conventional unmanned aerial vehicle for fire suppression.
Figure 2 is a configuration diagram showing the connection state of the multi-function fire drone according to the present invention with the operating vehicle.
Figure 3 is a perspective view to explain a specific embodiment of the multi-functional fire drone of the present invention.
Figure 4 is a side view showing an embodiment of the blade module in the multi-function firefighting drone of the present invention.
Figure 5 is a block diagram for explaining the operation system of the multi-function fire drone of the present invention.

Hereinafter, a multi-functional fire drone of a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

However, the embodiments described below are merely intended to provide a detailed description so that a person skilled in the art can easily implement the invention, and this does not limit the scope of protection of the present invention. doesn't mean

In the following description, when a part is said to be 'connected' to another part, this includes not only the case where it is directly connected, but also the case where it is connected with another element or device in between. Additionally, when a part is said to 'include' a certain component, this does not mean that other components are excluded, but that it can further include other components, unless specifically stated to the contrary.

The present invention is basically a firefighting drone that can be operated in a mobile manner. It is a multi-functional firefighting drone that is equipped with a power module for flight and a fire extinguishing liquid processing module for fire suppression, and receives fire extinguishing liquid stored in an operation vehicle on the ground and sprays the fire extinguishing liquid at the scene of the fire. provides.

In the present invention, a drone having six blade modules is described as a basic embodiment, but the number and shape of blades, overall size, and operation type do not limit the concept of the present invention. In addition, unmanned aerial vehicles including fixed wings are also included, and can be understood to include cases where they are controlled remotely by an operator as well as cases where they operate actively and autonomously.

Figure 2 is a configuration diagram showing the connection state of the multi-function fire drone according to the present invention with the operating vehicle.

In the basic concept of the present invention, the fire drone (2000) includes a plurality of rotors, a motor, and a controller, so that it can operate under control in the air, and is equipped with one or more nozzles to spray fire extinguishing liquid at the fire point. At this time, the fire extinguishing liquid is not stored in the fire drone 2000, but can be supplied from the operating vehicle 100 at a required flow rate.

The concept of the present invention is to overcome the limitations of fire-fighting operation of drones, which require a lot of energy to operate in the air. To achieve this purpose, a fire-fighting liquid supply device and a power source, which occupy the largest weight and volume as a fire-fighting drone, are used. It is constructed on the ground and connected to a fire drone (2000). At this time, to ensure mobility, a fire extinguishing liquid supply device constructed on the ground and a battery or AC input or DC input as a power source are mounted on the operating vehicle 100. Specific embodiments of this operating vehicle 100 will be described later.

Therefore, the operating vehicle 100 stores the fire extinguishing liquid (or its elements) and transports it to the fire point, and the fire drone 2000 is controlled at the point where fire extinguishing liquid spraying is required, performs a levitating operation, and is transmitted from the operating vehicle 100. The extinguishing liquid is sprayed at the required point and at the required pressure.

The operating vehicle 100 and the fire drone 2000 are connected to a fire extinguishing fluid transfer line 200 for supplying fire extinguishing fluid, and a power line 300 for supplying power may be additionally configured. The fire drone (2000) is wireless at the target point and can move and spray under remote control. In some cases, if it is impossible to operate it for fire suppression due to frequency interference, jamming, or failure of the controller, the operating vehicle ( It may also be considered that direct control is performed in 100). Therefore, the power line 300 can function as a control line.

As mentioned above, when operating a conventional drone for fire suppression, problems with temperature and weight and operating time due to proximity to fire serve as limitations. The problems of weight increase and operating time can be solved by connecting the fire extinguishing fluid transfer line 200 and the power line 300 to the operating vehicle 100, but let's discuss additional ways to solve the temperature problem. Additionally, as we have seen, since the operation of conventional drones is limited to throwing capsules, it is necessary to approach the technical issues of accurate spraying of fire extinguishing fluid and diversity of spraying types.

Figure 3 is a perspective view to explain an embodiment of a fire drone.

The fire drone (2000) includes a main body (2100) having a predetermined controller capable of operation control in order to have basic flight capabilities, a plurality of arm parts (2300) connected to the main body (2100), and the arm part (2300). It may be configured to include a plurality of blade modules 2400 that are supported and can generate flow through rotation of the motor and blade. Various known elements may be applied to the combination of the blade and motor.

The main body 2100 radially supports a plurality of arm parts 2300, and has a controller unit for navigation inside. As described above, the main body 2100 receives external power from the operating vehicle 100 through the power line 300, thereby eliminating the load caused by the installation of the battery.

An example is shown in which six arm parts 2300 are arranged at equal intervals in the circumferential direction, but the number or shape is not limited. The arm portion 2300 may preferably be configured in the form of a hollow round bar, and a space for connecting a control line to the blade module 2400 and/or a flow path for distal transmission of digestive fluid may be formed therein. will be. Embodiments of flow paths for transmitting digestive fluid will be described later.

A blade module 2400 is installed at the distal end of the arm portion 2300, and a motor and a blade are coupled to the blade module 2400. Due to the nature of access to the fire scene, a temperature management function may be provided.

To assist with takeoff and landing of the overall fire drone (2000) and support it on the ground, the main body (2100) may be provided with one or more leg portions (2500) extending downward. In the illustrated embodiment, it is symmetrical on both sides and can perform the function of supporting the extinguishing liquid treatment unit 2200 and/or the connecting end 2201 and/or the extinguishing liquid transfer line 200 and/or the power line 300. there is.

In addition, considering the shape in which the plurality of arm parts 2300 extend radially, the flame and turbulence at the fire scene, the cause of the increase in weight due to the configuration of the fire extinguishing liquid treatment unit 2200, and the vibration due to the operation of spraying the fire extinguishing liquid. There is a high possibility of occurrence. In consideration of this, it is preferable that the bridge portion 2310 is further configured to perform a vibration isolation function by interconnecting the arm portions 2300. In the illustrated embodiment, the bridge portion 2310 may connect the arm portions 2300 to each other in an overall hexagonal shape. This bridge portion 2310 can reduce vibration and impact and perform the function of preventing distortion of the overall structure. Considering the weight, it can be made of carbon fiber material.

The bridge unit 2310 may additionally perform temporary storage and transmission functions of digestive juice, which will be described later.

Meanwhile, a fire extinguishing liquid processing unit 2200 is provided on the lower side of the main body 2100 to process the fire extinguishing liquid transmitted from the operating vehicle 100. The fire extinguishing liquid processing unit 2200 may be connected to the operating vehicle 100 and the fire extinguishing liquid transfer line 200, and the fire extinguishing liquid transfer line 200 is connected to a connection end 2201 coupled to a predetermined bracket or leg portion 2500. It may be removable.

This fire extinguishing liquid processing unit 2200 may be provided with a space for temporarily storing the fire extinguishing liquid inside, a predetermined flow path, and a valve. For precise control from the controller unit, the valve is preferably composed of a solenoid valve or a switch valve. do.

A direct injection nozzle 2210 is disposed on one side of the fire extinguishing liquid treatment unit 2200, preferably at the front. The direct injection nozzle 2210 extends outward and has a predetermined direction, enabling precise injection to the fire point.

In an additional concept of the present invention, the injection of the direct injection nozzle 2210 and the injection or spray from the distal side of the arm portion 2300 can be selected, and the fire extinguishing liquid processing unit 2200 is provided with a predetermined selective spray that can control the discharge direction of the fire extinguishing liquid. A euro could be formed.

Figure 4 is a side view for explaining the blade module of a fire drone according to an additional concept of the present invention.

The blade module 2400 is supported at the distal end of the arm portion 2300, and generates rotational power and lifting force by the configuration of the motor 2420 and the blade 2410 as described above.

Considering operation as a fire-fighting drone, temperature management is particularly important because the motor 2420 may become uncontrollable if overheated due to the nature of the approach to the fire scene. In consideration of this, the blower unit 2430 may be further configured to cool the motor 2420. The blower unit 2430 may have an impeller (not shown) connected to the shaft of the motor 2420. The impeller may preferably be configured as an axial fan capable of sucking in external air from the side and discharging it to the upper and/or lower sides.

Meanwhile, as described above, the direct injection nozzle 2210 may be configured on the front side of the fire extinguishing liquid treatment unit 2200 for spraying fire extinguishing liquid. However, depending on the type of fire scene, there may be cases where a different form of spraying or spraying than direct fire is required. For example, if a flame is placed on the lower side of the fire drone (2000), the flame may travel through the fire drone (2000). In cases where the fire area is relatively large, it is preferable to cover a wide area rather than spray concentrated fire in a specific direction. Therefore, in addition to the direct injection nozzle 2210, an arm side nozzle 2220 may be additionally configured to additionally or selectively discharge fire extinguishing liquid from the end side of the arm portion 2300.

Accordingly, the arm part 2300 has a fire extinguishing liquid flow path therein and can receive the fire extinguishing liquid transmitted from the fire extinguishing liquid processing unit 2200 from the arm side nozzle 2220 and spray or spray it radially or downward.

Additionally, the bridge portion 2310 may additionally contribute to balanced distribution of digestive juices. Since the dark portion 2300 has an independent flow path in the circumferential direction, there is a possibility that the digestive fluid is biased to one side. This may cause a problem in the ability to evenly spray the fire extinguishing liquid, and it is desirable to add a means for equal distribution of the fire extinguishing liquid or a buffer means to the dark part 2300. In one embodiment, the bridge portion 2310 may be hollow and communicate with the internal flow path of the bridge portion 2310.

Considering the urban state, a predetermined controller mounted on the main body 2100 selects the arm side nozzle 2220 to transmit the extinguishing liquid delivered to the extinguishing liquid transfer line 200, and spreads in the internal flow path of the arm part 2300. In the process, distribution in the circumferential direction is achieved by branching to the bridge portion 2310, and when both the flow path inside the arm portion 2300 and the bridge portion 2310 are filled, injection is performed from the arm side nozzle 2220 by pressure. Therefore, the bridge unit 2310 can function as an equal distribution means. In some cases, the bridge portion 2310, which absorbs vibration, and the branch flow path as a means for equal distribution of digestive fluid may be configured separately.

Meanwhile, the functions of the arm side nozzle 2220 and the blower unit 2430 can be combined to contribute to uniform spraying downward of the fire drone 2000. Let us look at this process in more detail.

The lift generating flow of air (α) generated by the rotation of the blade 2410 is directed downward and generates lift mainly at high pressure on the outer side of the blade 2410.

The pressure of the lift generating flow (α) on the side where the motor 2420, which is the center of rotation, is placed is relatively low, and part of the air sucked from the blower unit 2430 cools the motor 2420 as a cooling flow (β). It functions to

In addition, a portion of the air sucked from the blower unit 2430 serves as a spray flow γ to guide the fire extinguishing liquid discharged from the arm nozzle 2220 approximately to the axial center and downward of the blade module 2400.

According to the above concept, the blower unit 2430 can separate and discharge external air sucked in the radial direction upward and downward to perform the function of cooling and spraying guidance, and for this purpose, the axial flow fan configured in the blower unit 2430 It may be composed of two impellers in different directions combined.

To comply with the operation of the blower unit 2430, the end of the arm side nozzle 2220 may be disposed at the bottom of the blower unit 2430 in a plan view, more preferably on the outer side of the bottom.

Figure 5 is a block diagram for explaining the operation of the multi-function fire drone of the present invention.

The operating vehicle 100 moves to the fire scene, is connected to the fire drone 2000 as needed, and performs the functions of transmitting the stored fire extinguishing liquid at a predetermined pressure and supplying power as described above.

A storage tank unit 120 is formed in the operating vehicle 100 by being connected to the fire extinguishing liquid transfer line 200. A supply unit 130 is configured on the discharge side of the storage tank unit 120, and the supply unit 130 may be configured with a motor pump and/or valve. The valve is preferably configured as a solenoid valve or switch valve to enable control of the control unit 1000.

The storage tank unit 120 may be connected to a plurality of immediately withdrawable storage units to enable selective mixing of materials, and the storage units include a powder storage unit 111, a halon storage unit 112, and a water storage unit ( 113). The powder storage unit 111 stores extinguishing powder that matches the fire type and can be withdrawn and used in a selected state, and the halon storage unit 112 is a halide and can be understood as a type of evaporative liquid fire extinguishing tank. . The supply unit 130 withdraws materials from one storage unit or a mixture from a plurality of storage units according to the user's selection to suit the type of fire and flows them into the storage tank unit 120 through the fire extinguishing liquid transfer line 200. Transmit at a given pressure.

Additionally, a power line 300 is connected to the control unit 1000 or a power supply device such as a battery.

The fire extinguishing liquid transfer line 200 and the power line 300 can be stored when moving the operating vehicle 100 and connected when preparing for flight of the fire drone 2000. Considering the convenience of storage and withdrawal, the reel It can be wrapped and stored in a (reel).

The control unit 1000 of the operating vehicle 100 or the controller unit 2010 of the fire drone 2000 may be remotely connected to the server 3100 through a predetermined relay unit 3000, and the server 3100 may be connected to the firefighter It may be a control server, disaster management server, command server, etc. In addition, the relay unit may use a common mobile communication network or disaster safety communication network of 5G or LTE, and the communication method is not limited.

Communication between the fire drone 2000 and the operating vehicle 100 is basically based on wireless communication, and can operate in the 2.4 GHz and 5.7 GHz bands simultaneously. For example, the 2.4GHz band can be used as a frequency to control the firefighting drone (2000), and the 5.7GHz band can be used to receive video signals from the firefighting drone (2000). However, the method of wired control through the power line 300 as described above is not excluded.

From a control perspective, the fire drone 2000 can be divided into a main body 2100 having a controller unit 2010 and a fire extinguishing fluid processing unit 2200 attached to the main body 2100. Preferably, the main body 2100 is provided with one or more of a camera unit 2111, a temperature detection unit 2112, or a position/posture detection unit 2113 to collect a predetermined detection signal from the controller unit 2010. It can be processed and transmitted to the control unit 1000.

The camera unit 2111 may be configured as an optical camera so that a remote operator can visually check the fire scene, and may be configured as a thermal imaging camera considering adaptability to the fire scene.

Additionally, the temperature sensing unit 2112 can generate a temperature sensing value to determine overheating of the blade module 2400 and perform temperature control. The temperature detection results by the temperature sensing unit 2112 or the camera unit 2111 are stored before and after fire suppression and can be used as important data to determine whether or not to input manpower or the input route.

Additionally, the location/attitude detection unit 2113 may have a GPS and/or IMU module.

Specifically, the controller unit 2010 as a control panel configured in the main body 2100 is connected to the control unit 1000 of the operating vehicle 100 and/or the operator's drone controller (not shown) and/or the remote control unit 2010 through the communication unit 2013. It can be connected to the server 3100. Here, the frequency bands used for drone operation include GPS (L2: 1,150 MHz ~ 1,300 MHz, L1: 1,550 MHz ~ 1,650 MHz), 2.4 GHz control frequency band (2,400 MHz ~ 2,484 MHz), and drone control frequency band (5,030 MHz). MHz ~ 5,150 MHz) or 5.8 GHz control frequency band (5,150 MHz ~ 5,850 MHz) may be applied.

The controller unit 2010 is equipped with a navigation control unit 2011 for basic navigation and attitude control, and controls the blade module 2400 according to the user's drone controller input or active judgment to maintain the position and attitude. do. Here, when the direct injection nozzle 2210 or the dark side nozzle 2220 is operated, the change in behavior due to the reaction can be performed through the control of each blade module 2400.

In addition, it is provided with an injection control unit 2012, and the injection control unit 2012 basically controls the function of the fire extinguishing liquid treatment unit 2200 to be discharged to the nozzle, and can control the opening/closing and/or opening degree of a predetermined valve. When the direct injection nozzle 2210 and the dark side nozzle 2220 are selected as in the above-described embodiment, the function of selecting the flow path configured in the fire extinguishing liquid treatment unit 2200 can be performed. At this time, when there is control of spraying or spraying by the blower unit 2430, a function for controlling the blowing pressure of the blower unit 2430 may be added.

In addition, the controller unit 2010 further includes a log module 2013, and functions to store and extract images from the camera unit 2111, information from GPS and IMU, navigation records, or records of fire suppression-related functions. can do.

Meanwhile, the fire drone (2000) has a parachute (2600) connected to a part of the main body (2100) and cannot fly due to malfunction of the blade module (2400) in the flight control unit (2011) or equipment is damaged due to flame or overheating. If it is determined that an accident such as loss of control has occurred, the parachute 2600 can be operated to enable safe recovery.

Application examples of the configurations of the above-described embodiments may be substituted for each other, or may be used additionally or interchangeably.

The multi-functional fire drone of the present invention described above has the advantage of enabling continuous supply of fire extinguishing fluid and power while ensuring mobility by connecting the fire drone and the operating vehicle as one set, allowing it to be operated for long-term fire suppression.

Through the above advantages, it is possible to reduce the weight and compactness of the flying part, making it economical and spraying fire extinguishing liquid in an effective manner at the desired location, so it can effectively prevent the spread of fire and extinguish it in places that are difficult for people or equipment to access. It leads to an effect.

In the above, the present invention has been described in detail based on examples and accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content described in the claims described later.

100...operating vehicle 200...digestive fluid transfer line
300...power line 1000...control unit
111...powder storage unit 112...halon storage unit
113...water storage unit 120...storage tank unit
130...Supply Department 2000...Fire Drone
2010...Controller Department 2011...Operation Control Department
2012...injection control unit 2013...log module
2014...Ministry of Communications 2100...Main Body
2111...camera part 2112...temperature sensing part
2113...position/posture detection unit 2200...digestive fluid processing unit
2201...connection end 2210...direct injection nozzle
2220... arm side nozzle 2300... dark part
2310...bridge part 2400...blade module
2410...blade 2420...motor
2430...blower unit 2600...parachute
3000...relay unit 3100...server

Claims (7)

A main body 2100 including a controller unit that is operated by receiving power from the operating vehicle 100 through the power line 300;
A plurality of blade modules (2400) connected to the main body by an arm portion (2300) and having motors and blades;
A fire extinguishing liquid processing unit 2200 coupled to the main body 2100 and connected to an operating vehicle through a fire extinguishing liquid transfer line 200;
A direct injection nozzle (2210) that extends in the direction selected from the fire extinguishing fluid processing unit and discharges the extinguishing fluid so as to have directionality;
An arm side nozzle (2220) disposed on the arm adjacent to the blade module and discharging fire extinguishing liquid downward;
It includes a bridge portion 2310 connecting adjacent arm portions to each other,
The blade module is,
A multi-functional fire drone equipped with a blower unit (2430) that sucks in external air from the side and discharges it as an axial flow, forming a cooling flow that prevents overheating of the motor.
According to paragraph 1,
A leg portion (2500) capable of connecting the main body and the fire extinguishing liquid treatment unit and supporting it on the ground; and
A multi-function fire drone further comprising a connection end (2201) coupled to the leg portion to which the fire extinguishing fluid transfer line is detachable.
According to paragraph 1,
A multi-functional fire drone further comprising a bridge portion (2310) that connects adjacent arm portions to prevent vibration and distortion.
According to paragraph 3,
The arm portion has a flow path inside which the digestive fluid from the digestive fluid processing unit is transmitted,
The bridge portion is a multi-functional fire drone that performs the function of communicating to distribute fire extinguishing fluid between the cancer portions.
According to paragraph 1,
The blower part,
A multifunctional firefighting drone in which part of the axial flow functions as a spray flow that guides the fire extinguishing liquid discharged from the arm side nozzle downward.
According to paragraph 1,
A multi-functional fire drone further comprising a camera unit (2111) that generates visible light images and heat detection images of the fire scene.
According to paragraph 1,
A multi-function fire drone further comprising a parachute (2600) that is deployed and functions to enable recovery when the controller determines that operation is impossible.

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