Fire extinguishing device and control method

Abstract

The application relates to the fire-fighting monitoring technical field and discloses a fire extinguishing device arranged on a slide rail network in a site, which comprises a fire source signal detecting module, a calculation processing module and a fire extinguishing spraying module. The fire source signal detecting module is used for detecting the fire source signal in the site. The calculation processing module is electrically connected with the fire source signal detecting module, and the calculation processing module is used for receiving the fire source signal. The fire extinguishing spraying module is arranged on the slide rail network in a sliding mode, the fire extinguishing spraying module carries multiple fire extinguishing mediums with different densities and can spray the fire extinguishing mediums to the fire source. The fire extinguishing spraying module is electrically connected with the calculation processing module, the calculation processing module sends a control signal to the fire extinguishing spraying module according to the fire source signal, and the fire extinguishing spraying module adjusts the position thereof according to the control signal and sprays the fire extinguishing medium with the corresponding density. The fire extinguishing device can efficiently switch the fire extinguishing mediums with different densities and adjust the spraying angle of the fire extinguishing medium according to the different fire extinguishing mediums.

Description

Fire extinguishing devices and control methods Technical Field

[0001] This application belongs to the field of fire monitoring technology, specifically relating to a fire extinguishing device and control method. Background Technology

[0002] Due to factors such as pipeline losses and air resistance, the density of the extinguishing agent significantly affects its spray distance. In actual firefighting operations, changing to a different density agent often requires interrupting operations to adjust and test the relationship between the spray angle and spray distance to improve extinguishing accuracy. Therefore, it is necessary to design a firefighting device that can pre-store the relationship between spray angle and spray distance when using extinguishing agents of different densities, thereby reducing intermediate adjustment and testing steps, improving firefighting efficiency, and enhancing the continuity of firefighting operations. Summary of the Invention

[0003] The purpose of this application is to provide a fire extinguishing device and control method that can efficiently switch between fire extinguishing media of different densities and adjust the spray angle of the fire extinguishing media according to different fire extinguishing media.

[0004] To achieve the above objectives, this application provides a fire extinguishing device, installed on a sliding rail network within a site, comprising:

[0005] Fire detection module, used to detect fire source signals within the site;

[0006] The processing module, electrically connected to the fire detection module, is used to receive fire source signals; and

[0007] The fire extinguishing spray module is slidably mounted on a slide rail network. The fire extinguishing spray module carries fire extinguishing media of various densities and can spray the fire extinguishing media toward the fire source.

[0008] The fire extinguishing spray module is electrically connected to the computing and processing module. The computing and processing module sends a control signal to the fire extinguishing spray module according to the fire source signal. The fire extinguishing spray module adjusts its position according to the control signal and sprays the fire extinguishing medium of the corresponding density.

[0009] In embodiments of this application, the fire extinguishing spray module includes:

[0010] The box body has through holes on its side walls;

[0011] Fire extinguishing storage unit, located inside the box and used to store fire extinguishing media;

[0012] The spray pipe is inserted into the through hole; one end of the spray pipe is connected to the fire extinguishing storage unit, and the other end is the spray end, extending out of the box.

[0013] The pressure control unit is connected to the fire extinguishing storage unit and is used to apply pressure to the fire extinguishing storage unit.

[0014] In an embodiment of this application, the fire extinguishing storage unit includes:

[0015] Multiple storage tanks are arranged side by side in sequence, each containing a storage cavity for storing extinguishing agents of different densities; and

[0016] The number of output pipes is the same as that of the storage boxes and they are connected to the storage cavities one by one. The end of the output pipe away from the storage cavity is connected to the injection pipe.

[0017] Each of the output pipes is equipped with an output solenoid valve that is electrically connected to the computing module.

[0018] In the embodiments of this application, the slide rail network includes multiple parallel and spaced tracks, and the bottom of the box is provided with multiple pulleys that slide in cooperation with the tracks.

[0019] In embodiments of this application, the pressure control unit includes:

[0020] Pressure storage tanks; and

[0021] The number of input pipes is the same as that of the storage boxes and they are connected to the storage cavities one by one. The end of the input pipe away from the storage cavity is connected to the pressure tank.

[0022] Each of the input pipes is equipped with an input electrically controlled valve that is electrically connected to the computing module.

[0023] In an embodiment of this application, the fire extinguishing spray module further includes an electronic densitometer partially inserted into the spray pipe. The electronic densitometer is used to measure the density value of the fire extinguishing medium transported in the spray pipe and send density feedback information to the calculation and processing module.

[0024] In the embodiments of this application, the maximum spray distance of the extinguishing medium can be obtained by the following calculation formula:

[0025]

[0026] (t>0)

[0027] Where L is the length of the spray pipe, P is the pressure difference between the two ends of the spray pipe, ρ is the fluid density, g is the gravitational acceleration, n is the roughness of the spray pipe, D is the diameter of the spray pipe, H is the initial height of the extinguishing medium entering the spray pipe relative to the ground, θ is the initial angle at which the extinguishing medium is sprayed from the spray pipe, t is the time, and x is the spray distance of the extinguishing medium.

[0028] In the embodiments of this application, the distance between the sliding rail network and the wall is less than or equal to 50cm.

[0029] In the embodiments of this application, a control method is proposed for use in the fire extinguishing device described above. The control method includes the following steps:

[0030] The fire detection module detects and identifies the location of the current fire source and sends the fire source signal to the processing module.

[0031] The processing module determines whether the current distance between the fire extinguishing spray module and the fire source meets the preset spray distance requirement based on the received fire source signal.

[0032] When the current distance between the fire extinguishing spray module and the fire source does not meet the preset spray distance requirement, control the fire extinguishing spray module to move until it covers the location of the fire source;

[0033] The fire extinguishing spray module selects and sprays the appropriate density of fire extinguishing medium.

[0034] In embodiments of this application, the control method further includes:

[0035] During the spraying of the extinguishing medium, the current density of the extinguishing medium at the spray nozzle is measured in real time and sent to the calculation and processing module. The calculation and processing module controls the switching of the extinguishing medium and the spraying speed based on the density feedback information.

[0036] In embodiments of this application, the control method further includes:

[0037] When the current distance between the fire extinguishing spray module and the fire source meets the preset spray distance requirement, the calculation and processing module adjusts the spray angle according to the fire extinguishing medium of different densities.

[0038] Through the above technical solutions, the fire extinguishing device and control method provided by the embodiments of the present invention have the following beneficial effects:

[0039] In the fire extinguishing device of this application, the fire detection module is used to detect the location of the fire source in the site and transmit the fire source signal to the processing module. After receiving the fire source signal, the processing module determines the location of the fire source and sends a control signal to the fire extinguishing spray module. If the location of the fire source does not meet the spraying distance of the extinguishing medium, the fire extinguishing spray module is driven to slide on the sliding rail network. If the location of the fire source meets the spraying distance of the extinguishing medium, the appropriate density of the extinguishing medium is selected according to the control signal type and sprayed onto the fire source. The fire extinguishing spray module in this application can ensure that the extinguishing medium can be effectively sprayed onto the fire source by adjusting its position on the sliding rail network, while the processing module can send different control signals to drive the fire extinguishing spray module to switch between different densities of extinguishing medium and spray onto the fire source, thereby improving the fire extinguishing efficiency.

[0040] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0041] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0042] Figure 1 is a structural schematic diagram of the fire extinguishing device according to this application;

[0043] Figure 2 is a schematic diagram of the movement path of the fire extinguishing device in the field according to this application;

[0044] Figure 3 is a structural block diagram of the fire extinguishing device according to this application;

[0045] Figure 4 is a structural block diagram of another fire extinguishing device according to this application;

[0046] Figure 5 is a structural block diagram of another fire extinguishing device according to this application;

[0047] Figure 6 is a flowchart of the control method of the fire extinguishing device according to this application;

[0048] Figure 7 is a schematic diagram of the fire extinguishing spray module according to this application;

[0049] Figure 8 shows the relationship between the spray angle and horizontal spray distance of extinguishing media of different densities according to this application.

[0050] Explanation of reference numerals in the attached figures

[0051] Detailed Implementation

[0052] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0053] The fire extinguishing device and control method according to this application are described below with reference to the accompanying drawings.

[0054] As shown in Figures 1 and 3, in an embodiment of this application, a fire extinguishing device is proposed, which is installed on a sliding rail network within a site. The fire extinguishing device includes a fire detection module 10, a processing module 20, and a fire extinguishing spray module 30. The fire detection module 10 is used to detect fire source signals within the site. The processing module 20 is electrically connected to the fire detection module 10 and is used to receive fire source signals. The fire extinguishing spray module 30 is slidably installed on the sliding rail network. The fire extinguishing spray module 30 carries various fire extinguishing media of different densities and is capable of spraying the fire extinguishing media towards the fire source. The fire extinguishing spray module 30 is electrically connected to the processing module 20. The processing module 20 sends a control signal to the fire extinguishing spray module 30 based on the fire source signal. The fire extinguishing spray module 30 adjusts its position according to the control signal and sprays fire extinguishing media of the corresponding density.

[0055] The fire detection module 10 in this application is used to detect the location of a fire source within the site and transmits the fire source signal to the processing module 20. Upon receiving the fire source signal, the processing module 20 sends a control signal to the fire extinguishing spray module 30 based on the fire source location. If the fire source location does not meet the spray distance of the extinguishing medium, the fire extinguishing spray module 30 is driven to slide on the sliding rail network. If the fire source location meets the spray distance of the extinguishing medium, the appropriate density of the extinguishing medium is selected according to the control signal type and sprayed onto the fire source. The fire extinguishing spray module 30 in this application ensures that the extinguishing medium can be effectively sprayed onto the fire source by adjusting its position on the sliding rail network, while the processing module 20 drives the fire extinguishing spray module 30 to switch between different densities of extinguishing medium to spray onto the fire source by sending different control signals, thereby improving fire extinguishing efficiency.

[0056] As shown in Figures 1 and 4, in the embodiments of this application, the fire extinguishing spray module 30 includes a housing 31, a fire extinguishing storage unit 32, a spray pipe 33, and a pressure control unit 34. A through hole is provided on the side wall of the housing 31. The fire extinguishing storage unit 32 is disposed inside the housing 31 and is used to store the fire extinguishing medium. The spray pipe 33 is inserted into the through hole, with one end connected to the fire extinguishing storage unit 32 and the other end serving as the spray end extending outside the housing 31. The pressure control unit 34 is connected to the fire extinguishing storage unit 32 and is used to apply pressure to the fire extinguishing storage unit 32, increasing the internal pressure of the fire extinguishing storage unit 32, enabling the fire extinguishing medium to have a longer spray distance when sprayed externally, and further improving the fire extinguishing efficiency of the fire extinguishing device. As shown in Figure 1, the processing module 20 is installed and fixed to the side wall of the housing 31.

[0057] As shown in Figures 1 and 5, in the embodiment of this application, the fire extinguishing storage unit 32 includes a fire extinguishing storage box 321 and an output pipe 322. Multiple fire extinguishing storage boxes 321 are arranged side-by-side in sequence, each containing a storage cavity for storing fire extinguishing media of different densities. The number of output pipes 322 is the same as the number of storage boxes, and each pipe connects to a storage cavity. The end of each output pipe 322 away from the storage cavity is connected to a spray pipe 33. Each output pipe 322 is equipped with an output electrically controlled valve 323 electrically connected to the processing module 20, facilitating the processing module 20 to control the output electrically controlled valve 323 to switch between open and closed states, thereby conveniently and efficiently switching the type of fire extinguishing media sprayed externally from the spray pipe 33.

[0058] In the embodiments of this application, the slide rail network includes multiple parallel and spaced tracks 40, and the bottom of the housing 31 is provided with multiple pulleys 35 that slide with the tracks 40. A bearing 38 is connected between two parallel pulleys 35 located on different tracks 40, which can effectively improve the mobility of the fire extinguishing device.

[0059] As shown in Figures 1 and 5, in the embodiments of this application, the pressure control unit 34 includes a pressure tank 341 and input pipes 342. The number of input pipes 342 is the same as the number of storage tanks, and each pipe corresponds to a storage cavity. The end of the input pipe 342 away from the storage cavity is connected to the pressure tank 341. Taking this application as an example, as shown in Figure 1, the fire extinguishing storage unit 32 has one pressure tank 341 connected to five storage tanks 321 to increase the pressure within the storage cavity. Each of the multiple input pipes 342 is equipped with an input electrically controlled valve 343 electrically connected to the processing module 20. Fasteners 37 are also provided on the outer periphery of the pressure tank 341 to fix the position of the pressure tank 341 relative to the housing 31, preventing the pressure tank 341 from colliding with other components due to the shaking of the housing 31.

[0060] In the embodiments of this application, the fire extinguishing spray module 30 further includes an electronic densitometer 36 partially inserted into the spray pipe 33. The electronic densitometer 36 is used to measure the density value of the fire extinguishing medium transported in the spray pipe 33 and send density feedback information to the calculation and processing module 20 to assist the calculation and processing module 20 in controlling the fire extinguishing spray module 30, so that the fire extinguishing spray module 30 adjusts the angle and initial velocity of the fire extinguishing medium spray according to the different density feedback information received.

[0061] As shown in Figure 7, in the embodiments of this application, the maximum spray distance of the extinguishing medium can be obtained by the following calculation formula:

[0062]

[0063] (t>0)

[0064] Where L is the length of the spray pipe 33, P is the pressure difference between the two ends of the spray pipe 33, ρ is the fluid density, g is the gravitational acceleration, n is the roughness of the spray pipe 33, D is the diameter of the spray pipe 33, H is the initial height of the extinguishing medium entering the spray pipe 33 relative to the ground, θ is the initial angle at which the extinguishing medium is sprayed from the spray pipe 33, t is the time, and x is the spray distance of the extinguishing medium.

[0065] The formula for calculating the maximum spray distance of the extinguishing agent, when broken down step by step, should be:

[0066] First, as shown in Figure 7, the flow rate of the fire extinguishing medium under a certain pressure can be determined using the following formula:

[0067]

[0068]

[0069]

[0070] Where Q is the jet flow rate, h is the head difference between the two ends of the pipe, s is the pipe specific resistance, L is the length of the jet pipe 33, P is the pressure difference between the two ends of the jet pipe 33, ρ is the fluid density, g is the gravitational acceleration, n is the roughness of the jet pipe 33, and D is the diameter of the jet pipe 33. In this application, n is taken as 0.01.

[0071] The injection flow rate Q can be determined from the above formula, and then the following formula can be used:

[0072]

[0073]

[0074]

[0075]

[0076]

[0077] Where Q is the jet flow rate, D is the diameter of the jet pipe, and v is the initial velocity of the extinguishing medium. Let the velocity be the component in the horizontal direction. Let H be the velocity component in the height direction, H be the initial height of the extinguishing medium entering the spray pipe 33 relative to the ground, g be the acceleration due to gravity, t be time (greater than 0), and x be the spray distance of the extinguishing medium.

[0078] Finally, the spray distance x of the extinguishing medium under ideal conditions can be obtained from the above formula.

[0079] Furthermore, by testing the relationship between the spray angle and horizontal spray distance of extinguishing media of different densities in advance, the following formula can be used to obtain:

[0080]

[0081] Where x is the spray distance of the extinguishing medium, θ is the initial angle of the extinguishing agent sprayed from the nozzle, and a and b are coefficients.

[0082] As shown in Figure 8, the coefficients a and b corresponding to different densities of extinguishing media can be determined by the above formula, and these values ​​are stored in the calculation and processing module 20. At this point, the angle of inclination of the spray pipe 33 can be adjusted according to the spray distance of the extinguishing media with different densities.

[0083] As shown in Figure 2, in the embodiment of this application, the distance between the sliding rail network and the wall is less than or equal to 50cm, to ensure that the fire extinguishing device can cover the site without dead angles after sliding and adjusting along the sliding rail network, and to ensure that the fire extinguishing medium can be effectively sprayed to the fire source. Preferably, the sliding rail network in this application is regularly distributed on the walls and ceiling of the site, and is provided with grooves that can be embedded in the pulleys 35.

[0084] As shown in Figure 6, in an embodiment of this application, a control method is proposed and applied to the fire extinguishing device described above. The control method includes the following steps S1 to S4:

[0085] S1, the fire detection module 10 detects and identifies the location of the current fire source and sends a fire source signal to the calculation and processing module 20;

[0086] S2, the calculation and processing module 20 determines whether the current distance between the fire extinguishing spray module 30 and the fire source meets the preset spray distance requirement based on the received fire source signal;

[0087] S3, when the current distance between the fire extinguishing spray module 30 and the fire source does not meet the preset spray distance requirement, control the fire extinguishing spray module 30 to move until it covers the position of the fire source;

[0088] S4, control the fire extinguishing spray module 30 to select the fire extinguishing medium of the corresponding density and spray it.

[0089] In an embodiment of this application, step S2 further includes:

[0090] When the current distance between the fire extinguishing spray module 30 and the fire source meets the preset spray distance requirement, there is no need to adjust the position of the fire extinguishing spray module 30. After selecting the appropriate density of the fire extinguishing medium, the calculation and processing module 20 adjusts the spray angle according to the selected fire extinguishing medium to ensure that the fire extinguishing medium accurately reaches the fire source after spraying. The fire extinguishing device of this application reduces intermediate adjustment and testing steps by testing fire extinguishing media of different densities in advance and storing the correspondence between spray angle and spray distance when using fire extinguishing media of different densities. This improves the efficiency and continuity of fire extinguishing operations. Furthermore, the control method of the fire extinguishing device can efficiently switch between fire extinguishing media of different densities, effectively improving the fire extinguishing effect.

[0091] In an embodiment of this application, step S4 further includes:

[0092] During the spraying of the extinguishing medium, the current density of the extinguishing medium at the spray nozzle is measured in real time and sent to the calculation and processing module 20. The calculation and processing module 20 controls the switching of the extinguishing medium and the spraying speed based on the density feedback information. The control method of the extinguishing device is not limited to the sequential execution of S1 to S4; new technical methods can be derived from the above control steps, all of which fall within the protection scope of this application.

[0093] It should be noted that the switching of extinguishing media is identified by the fire detection module 10 and controlled by the processing module 20. It can automatically adjust the initial spray velocity according to different densities of extinguishing media, reducing the testing and calibration time consumed when changing extinguishing media of different densities. The fire detection module 10 identifies the burning material at the fire source location and selects a targeted extinguishing media based on different fuels, such as solid fuels, liquid fuels, and gaseous fuels, effectively improving the fire extinguishing effect.

[0094] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0095] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0097] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A fire extinguishing device, installed on a sliding rail network within a site, characterized in that, The fire extinguishing device includes: a fire detection module (10) for detecting fire source signals in the site; a processing module (20) electrically connected to the fire detection module (10), the processing module (20) for receiving the fire source signals; and a fire extinguishing spray module (30) slidably mounted on the slide rail network, the fire extinguishing spray module (30) carrying various fire extinguishing media of different densities and capable of spraying the fire extinguishing media toward the fire source, the fire extinguishing spray module (30) including a housing (31), a fire extinguishing storage unit (32), a spray pipe (33), and a pressure control unit. The unit comprises a core (34), multiple storage tanks (321), an output pipe (322), and an electronic densitometer (36). A through hole is provided on the side wall of the housing (31). A fire extinguishing storage unit (32) is located inside the housing (31) and used to store the fire extinguishing medium. A spray pipe (33) is inserted into the through hole. One end of the spray pipe (33) is connected to the fire extinguishing storage unit (32), and the other end is the spray end extending outside the housing (31). A pressure control unit (34) is connected to the fire extinguishing storage unit (32) and used to apply pressure to the fire extinguishing storage unit (32). Multiple storage tanks (321) are arranged side by side in sequence. Each storage tank has a storage cavity for storing extinguishing media of different densities. The number of output pipes (322) is the same as that of the storage tanks and they are connected to the storage cavities one by one. The end of each output pipe (322) away from the storage cavity is connected to the spray pipe (33). Each of the multiple output pipes (322) is equipped with an output electric control valve (323) that is electrically connected to the processing module (20). The electronic densitometer (36) is partially inserted into the spray pipe (33). The densitometer (36) is used to measure the density of the extinguishing medium transported in the spray pipe (33) and send density feedback information to the calculation and processing module (20); wherein, the extinguishing spray module (30) is electrically connected to the calculation and processing module (20), the calculation and processing module (20) sends a control signal to the extinguishing spray module (30) according to the fire source signal, and the extinguishing spray module (30) adjusts its own position and sprays the extinguishing medium of the corresponding density according to the control signal. The maximum spray distance of the extinguishing medium can be obtained by the following calculation formula: (t>0) where L is the length of the spray pipe (33), P is the pressure difference between the two ends of the spray pipe (33), ρ is the fluid density, g is the gravitational acceleration, n is the roughness of the spray pipe (33), D is the diameter of the spray pipe (33), H is the initial height of the extinguishing medium entering the spray pipe (33) relative to the ground, θ is the initial angle at which the extinguishing medium is sprayed from the spray pipe (33), t is the time, and x is the spray distance of the extinguishing medium.

2. The fire extinguishing device according to claim 1, characterized in that, The slide rail network includes multiple parallel and spaced tracks (40), and the bottom of the box (31) is provided with multiple pulleys (35) that slide with the tracks (40).

3. The fire extinguishing device according to claim 1, characterized in that, The pressure control unit (34) includes: a pressure tank (341); and input pipes (342), the same number as the storage tank and connected to the storage cavity one by one. The end of the input pipe (342) away from the storage cavity is connected to the pressure tank (341); wherein, each of the multiple input pipes (342) is provided with an input solenoid valve (343) that is electrically connected to the arithmetic processing module (20).

4. The fire extinguishing device according to any one of claims 1 to 3, characterized in that, The distance between the sliding rail network and the wall is less than or equal to 50cm.

5. A control method for a fire extinguishing device, characterized in that, The control method, applied to any one of claims 1 to 4, comprises the following steps: detecting and identifying the current location of the fire source through the fire detection module (10) and sending a fire source signal to the calculation and processing module (20); the calculation and processing module (20) determines whether the current distance between the fire extinguishing spray module (30) and the fire source meets the preset spray distance requirement based on the received fire source signal; when the current distance between the fire extinguishing spray module (30) and the fire source does not meet the preset spray distance requirement, controlling the fire extinguishing spray module (30) to move until it covers the location of the fire source; and controlling the fire extinguishing spray module (30) to select and spray the fire extinguishing medium of the corresponding density.

6. The control method for the fire extinguishing device according to claim 5, characterized in that, The control method further includes: during the spraying of the extinguishing medium, measuring the current density of the extinguishing medium at the spray nozzle in real time and sending density feedback information to the calculation and processing module (20), and the calculation and processing module (20) controlling the switching of the extinguishing medium and the spraying speed according to the density feedback information.

7. The control method for the fire extinguishing device according to claim 5, characterized in that, The control method further includes: when the current distance between the fire extinguishing spray module (30) and the fire source meets the preset spray distance requirement, the calculation and processing module (20) adjusts the spray angle according to the fire extinguishing medium of different densities.

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