A vehicle automatic fire extinguishing system and method

Abstract

The invention discloses a vehicle automatic fire extinguishing system and method, belonging to the field of vehicle fire protection, wherein the device comprises a plurality of fire monitoring points arranged on the vehicle, each fire monitoring point is provided with a sensor group, a dry powder spray point and a foam spray point fixedly installed by a bracket, a dry powder storage tank and a foam fire extinguishing agent storage tank for conveying fire extinguishing materials by internal pressure or an external pressurizing device are also installed on the bracket, the dry powder spray point is connected to the dry powder storage tank through a dry powder pipeline, the foam spray point is connected to the foam fire extinguishing agent storage tank through a foam pipeline, a first control valve is installed on the dry powder pipeline, a second control valve is installed on the foam pipeline, the sensor group, the external pressurizing device, the first control valve and the second control valve are all electrically connected to a controller, and the controller is used to control the working states of the external pressurizing device, the first control valve and the second control valve according to data of a temperature sensor and an oil and gas sensor.

Description

Technical Field

[0001] The present invention relates to the field of vehicle fire protection, and in particular to an automatic vehicle fire extinguishing system and method. Background Art

[0002] With the increase in the number of vehicles, vehicles can be seen everywhere, whether in cities or in rural areas. The increase in vehicles is often accompanied by frequent accidents, and various types of accidents are likely to cause vehicle fires. In addition, vehicle accidents are also accompanied by damage to the vehicle structure, which can easily cause the door to deform and be unable to open, making it difficult for people in the car to escape in time, resulting in casualties.

[0003] In the prior art, it is usually required to install a fire extinguisher in the vehicle, and the occupants in the vehicle can extinguish the fire by themselves when the vehicle catches fire. However, this is also a drop in the bucket when the car door cannot be opened and the occupants cannot escape in time. Moreover, when the fire point is outside the car, the fire extinguisher placed in the car basically cannot extinguish the fire.

[0004] Moreover, the research found that there are three main causes of vehicle fires: first, the accident caused the engine to be damaged, and the high-temperature fuel leakage caused the engine compartment to catch fire; second, the accident caused the fuel tank to be damaged, and the leaked fuel encountered an open flame and caused a fire; third, the aging of the line led to a circuit short circuit and caused a fire.

[0005] Based on the above two reasons, it is necessary to provide a method or device for extinguishing a vehicle fire in a targeted manner. Summary of the invention

[0006] In view of the problem in the prior art that it is difficult to promptly extinguish a fire and provide rescue services after a vehicle catches fire, an object of the present invention is to provide an automatic vehicle fire extinguishing system and method.

[0007] To achieve the above object, the technical solution of the present invention is:

[0008] A first aspect of the present invention provides a vehicle automatic fire extinguishing system, comprising:

[0009] Fire monitoring points, the fire monitoring points are at least arranged at the engine compartment and fuel tank of the vehicle, each of the fire monitoring points is provided with a sensor group, the sensor group includes at least one temperature sensor and at least one gasoline sensor;

[0010] A dry powder storage tank, which is arranged on the vehicle and contains dry powder. The dry powder storage tank is a pressure tank or is connected to an external pressurizing device;

[0011] A foam fire extinguishing agent storage tank, which is arranged on the vehicle, and stores foam fire extinguishing agent inside the foam fire extinguishing agent storage tank, and the foam fire extinguishing agent storage tank is a pressure storage tank or is connected to an external pressurizing device;

[0012] A dry powder spraying point, wherein the dry powder spraying point is arranged at each fire monitoring point and connected to the dry powder storage tank via a dry powder pipeline;

[0013] A foam spraying point, wherein the foam spraying point is arranged at each fire monitoring point and connected to the foam fire extinguishing agent storage tank through a foam pipe;

[0014] a first control valve, the first control valve being installed on the dry powder pipeline and being used to control the communication state between the dry powder spraying point and the dry powder storage tank;

[0015] a second control valve, the second control valve being installed on the foam pipe and used for controlling the communication state between the foam spraying point and the foam fire extinguishing agent storage tank;

[0016] A controller, wherein the controller is electrically connected to the temperature sensor, the oil and gas sensor, the external pressurizing device, the first control valve, and the second control valve, and is used to control the working states of the external pressurizing device, the first control valve, and the second control valve according to data from the temperature sensor and the oil and gas sensor.

[0017] Preferably, the first control valve and the second control valve are both one-inlet and multiple-outlet solenoid valves, the inlet of the one-inlet and multiple-outlet solenoid valves are used to connect to the dry powder storage tank or the foam fire extinguishing agent storage tank, and the outlet is used to connect to the dry powder pipeline or the foam pipeline.

[0018] Preferably, the external pressurizing device is an air pump.

[0019] Preferably, the air pump is driven by the engine of the vehicle, or the air pump is connected to a motor and the motor is powered by a battery of the vehicle.

[0020] Preferably, the air pump is slidably mounted on the vehicle, a linear drive mechanism for driving the air pump to slide is fixedly mounted on the vehicle, and the air pump is connected to a belt pulley that matches the engine belt.

[0021] Preferably, the dry powder storage tank is coated with a thermal insulation layer.

[0022] Furthermore, it also includes an alarm and at least one carbon monoxide sensor arranged inside the vehicle, the carbon monoxide sensor and the alarm are both electrically connected to the controller, and the controller is electrically connected to the engine control system of the vehicle.

[0023] A second aspect of the present invention provides a vehicle automatic fire extinguishing method, comprising the following steps:

[0024] S1. Receiving the temperature at a fire monitoring point detected by a temperature sensor; wherein the fire monitoring point includes at least the engine compartment and fuel tank position of the vehicle;

[0025] S2, determining whether the temperature exceeds a first threshold value, if yes, determining that the fire monitoring point is a fire starting point and proceeding to step S3, otherwise returning to step S1;

[0026] S3, receiving the gasoline concentration at the ignition point detected by the gasoline sensor;

[0027] S4, judging whether the gasoline concentration exceeds a second threshold value, if yes, judging the ignition point to be an oil fire and proceeding to step S5, otherwise judging the ignition point to be an ordinary fire and proceeding to step S6;

[0028] S5, opening the first control valve on the dry powder pipeline, so that the dry powder fire extinguishing agent stored in the dry powder storage tank is delivered to the fire point by pressure delivery; wherein the dry powder pipeline is laid in advance and its two ends are connected to the dry powder storage tank and the fire monitoring point respectively;

[0029] S6. Open the second control valve on the foam pipeline to deliver the foam fire extinguishing agent stored in the foam fire extinguishing agent storage tank to the fire point by pressure delivery; wherein the foam pipeline is laid in advance and its two ends are respectively connected to the dry powder storage tank and the fire monitoring point.

[0030] Preferably, after step S5, step S506 is further included:

[0031] S506, record the duration that the temperature value exceeds the first threshold, and detect whether the duration exceeds a third threshold, if yes, proceed to step S6.

[0032] Preferably, when the pressure delivery method in step S4 and / or step S5 is to provide pressure through an external pressure device, step S102 is further included between step S1 and step S2.

[0033] S102, determining whether the temperature exceeds a fifth threshold, if yes, starting the external pressurizing device and proceeding to step S2, otherwise proceeding to step S1.

[0034] By adopting the above technical solution, fire monitoring points are set up in the engine compartment and fuel tank positions of the vehicle where fire is prone to occur, and temperature sensors and gasoline sensors are arranged at the fire monitoring points at the same time. Therefore, it is possible to promptly determine whether a fire has occurred and whether it is an oil fire of the gasoline combustion type, so as to provide dry powder fire extinguishing agent or fire-fighting water for fire extinguishing in a targeted manner. Not only can the flames be extinguished quickly, but also the spread of fire caused by improper firefighting measures can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the vehicle automatic fire extinguishing system in Example 1;

[0036] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0037] Figure 3 It is a structural block diagram of the vehicle automatic fire extinguishing system in Example 1;

[0038] Figure 4 Another structural block diagram of the vehicle automatic fire extinguishing system in Embodiment 1;

[0039] Figure 5 It is another structural block diagram of the vehicle automatic fire extinguishing system in the first embodiment;

[0040] Figure 6 It is a circuit connection block diagram of the vehicle automatic fire extinguishing system in Example 1;

[0041] Figure 7 A circuit diagram of the temperature sensor controlling the first control valve and the second control valve in Example 1;

[0042] Figure 8 A circuit diagram of the gasoline sensor controlling the first control valve and the second control valve in the first embodiment;

[0043] Fig. 9 It is a structural block diagram of the vehicle automatic fire extinguishing system in Example 2;

[0044] Fig.10 This is a circuit connection block diagram of the vehicle automatic fire extinguishing system in Embodiment 2;

[0045] Fig.11 This is a flow chart of the automatic vehicle fire extinguishing method in Embodiment 6;

[0046] Fig.12 Another flow chart of the automatic vehicle fire extinguishing method in Embodiment 6;

[0047] Fig.13 This is another flow chart of the automatic vehicle fire extinguishing method in Example 6.

[0048] In the figure: 1-fire monitoring point, 2-sensor group, 21-temperature sensor, 22-gasoline sensor, 3-dry powder storage tank, 4-foam storage tank, 5-external pressurizing device, 6-dry powder spraying point, 7-foam spraying point, 8-first control valve, 9-second control valve, 10-controller, 11-dry powder pipeline, 12-foam pipeline, 13-bracket, 100-vehicle, 110-engine compartment, 120-fuel tank. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention. It can be understood by those skilled in the art that, unless specifically stated, the singular forms "one", "one", "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used here may include wireless connection or coupling. The term "and / or" used herein includes any unit and all combinations of one or more associated listed items. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as generally understood by those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0050] Embodiment 1

[0051] like Figure 1 and Figure 2 As shown, the first aspect of the present invention provides a vehicle automatic fire extinguishing system, which can be applied to vehicle fire extinguishing scenarios, wherein the vehicle is not limited to the types of vehicles such as cars, buses, trucks, and fuel vehicles, electric vehicles, hybrid vehicles, etc., and includes:

[0052] The fire monitoring point 1 is set at the engine compartment 110 and the fuel tank 120 of the vehicle 100. Both the engine compartment 110 and the fuel tank 120 have gasoline, which are prone to fire after an accident. Therefore, it is necessary to set the fire monitoring point 1. Of course, the fire monitoring point 1 can also be arranged at other positions of the vehicle 100 as needed, such as the passenger compartment of a public bus. In addition, multiple fire monitoring points 1 can be arranged at important positions. For example, two or three fire monitoring points 1 can be set in the above-mentioned engine compartment 110, so as to better monitor the engine position from multiple directions. Each of the above-mentioned fire monitoring points 1 is provided with a sensor group 2, and the sensor group 2 includes at least one temperature sensor 21 and at least one gasoline sensor 22. Usually, when multiple sensors of the same type are set, they can verify each other, improve accuracy, and reduce the probability of misjudgment. However, in this embodiment, for cost considerations, each sensor group 2 is set to include only one temperature sensor 21 and one gasoline sensor 22.

[0053] The vehicle automatic fire extinguishing system of the present invention further includes a bracket 13, which is fixed to the vehicle 100 by bolts, and the temperature sensor 21 and the gasoline sensor 22 are fixedly mounted on the bracket 13 by screws or buckle structures. It can be understood that each fire monitoring point 1 having a sensor group 2 has a bracket 13, so the specific installation position of the bracket 13 can be installed on the chassis structure of the vehicle 100, or in the passenger compartment, or other positions, for example, the dry powder storage tank 3 can be installed in the engine compartment 110 or the fuel tank 120.

[0054] The dry powder storage tank 3 is arranged on the vehicle 100. Specifically, the dry powder storage tank 3 is fixed to the bracket 13 by screws. The dry powder storage tank 3 stores dry powder for fire extinguishing, and the dry powder storage tank 3 is a pressure storage tank or is connected to an external pressurizing device 5, so that the dry powder is sprayed out by pressure delivery. In this embodiment, the dry powder storage tank 3 is preferably a pressure storage tank, that is, in addition to the dry powder for fire extinguishing, it is also filled with pressurized gas, such as compressed air. When in use, only the spray port needs to be opened to drive the dry powder to spray out through compressed air.

[0055] The foam fire extinguishing agent storage tank 4 is arranged on the vehicle 100. Specifically, the foam fire extinguishing agent storage tank 4 is fixed to the bracket 13 by screws. The foam fire extinguishing agent storage tank 4 stores foam fire extinguishing agent inside. The foam fire extinguishing agent storage tank 4 is a pressure storage tank or is connected to an external pressurizing device 5. In this embodiment, the foam fire extinguishing agent storage tank 4 is preferably a pressure storage tank, that is, in addition to the foam fire extinguishing agent for fire extinguishing, it is also filled with pressurized gas, such as compressed air. When in use, the foam fire extinguishing agent is driven to spray outward by the internal compressed air.

[0056] Since only one dry powder storage tank 3 and one foam fire extinguishing agent storage tank 4 are provided in this embodiment, the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4 can be installed on any bracket 13, that is, the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4 can be installed on the same bracket 13, such as Figure 2 As shown; of course, the dry powder storage tank 3 and the foam extinguishing agent storage tank 4 can also be installed on two different brackets 13.

[0057] A plurality of dry powder spray points 6 are respectively arranged at each fire monitoring point 1, and each dry powder spray point 6 is connected to the above-mentioned dry powder storage tank 3 through a dry powder pipeline 11. In this embodiment, the dry powder spray point 6 is a dry powder spray head connected to the dry powder pipeline 11, and the dry powder spray head is fixed to the bracket 13 by means of screws or the like. In another embodiment, the dry powder spray point 6 can also be a spray hole on the side wall of the pipeline where the dry powder pipeline 11 extends to the position of the fire monitoring point 1, and the dry powder can form a dry powder spray point 6 at the spray hole. In this embodiment, since there are multiple dry powder pipelines 11, the multiple dry powder pipelines 11 can connect multiple brackets 13, so that the various hardware components of the present invention are connected into a whole.

[0058] Multiple foam spray points 7, multiple foam spray points 7 are respectively arranged at each fire monitoring point 1, and each foam spray point 7 is connected to the foam fire extinguishing agent storage tank 4 through a foam pipe 12. In this embodiment, the foam spray point 7 is a foam nozzle connected to the foam pipe 12, and the foam nozzle is fixed to the bracket 13 by screws or the like. Similarly, in another embodiment, the foam spray point 7 can also be a spray hole on the side wall of the pipe where the foam pipe 12 extends to the position of the fire monitoring point 1, and the foam fire extinguishing agent can form the foam spray point 7 at the spray hole. Similarly, the various hardware components of the present invention can also be connected into a whole through the foam pipe 12.

[0059] The first control valve 8 is installed on the dry powder pipeline 11 respectively. The first control valve 8 is used to control the connection state between the dry powder spray point 6 and the dry powder storage tank 3, so that different dry powder spray points 6 can be controlled to be connected with the dry powder storage tank 3 by adjusting the state of the first control valve 8. In this embodiment, the first control valve 8 is set as a one-inlet and multiple-outlet solenoid valve. The inlet of the one-inlet and multiple-outlet solenoid valve is used to connect the dry powder storage tank 3 through a pipeline, and its multiple outlets are respectively connected to the above-mentioned multiple dry powder pipelines 11, so that the connection between the dry powder storage tank 3 and different dry powder pipelines 11 is achieved by adjusting the state of the first control valve 8. Since each dry powder pipeline 11 is respectively connected to a different dry powder spray point 6, it is possible to transport dry powder from the dry powder storage tank 3 to different dry powder spray points 6 to achieve the purpose of fire extinguishing, such as Figure 3Alternatively, in another embodiment, a first control valve 8, such as an electric stop valve, may be provided on each dry powder pipeline 11, so that different dry powder spraying points 6 can be controlled to be connected to the dry powder storage tank 3 by only controlling the on / off state of the corresponding first control valve 8, as shown in FIG. Figure 4 shown.

[0060] The second control valve 9 is installed on the foam pipe 12. The second control valve 9 is used to control the connection state between the foam spray point 7 and the foam fire extinguishing agent storage tank 4, so that different foam spray points 7 can be connected to the foam fire extinguishing agent storage tank 4 by adjusting the state of the second control valve 9. In this embodiment, the second control valve 9 is also set as a one-inlet and multiple-outlet solenoid valve, which can be the same as or different from the model of the first control valve 8. An inlet of the second control valve 9 is used to connect the foam fire extinguishing agent storage tank 4 through a pipeline, and the multiple outlets of the second control valve 9 are respectively connected to the above-mentioned multiple foam pipes 12, so that the foam fire extinguishing agent storage tank 4 can be connected to different foam pipes 12 by adjusting the state of the second control valve 9. Since each water pipe 12 is respectively connected to a different foam spray point 7, it is possible to transport water from the foam fire extinguishing agent storage tank 4 to different foam spray points 7 to achieve the purpose of fire extinguishing, such as Figure 3 Alternatively, in another embodiment, a second control valve 9, such as an electric stop valve, may be provided on each foam pipe 12, so that different foam spraying points 7 can be controlled to communicate with the foam extinguishing agent storage tank 4 by only controlling the on / off state of the corresponding second control valve 9, as shown in FIG. Figure 4 shown.

[0061] The controller 10 is electrically connected to the temperature sensor 21, the oil and gas sensor 22, the first control valve 8, and the second control valve 9, and is used to control the working state of the first control valve 8 and the second control valve 9 according to the data of the temperature sensor 21 and the oil and gas sensor 22, such as Figure 6 As shown. The controller 10 can be installed on the bracket 13, or in the vehicle 100, and even the electrical components can be electrically connected to the central control system of the vehicle 100, so that the central control system of the vehicle 100 can be used to provide data processing and control. At the same time, the sensor group 2 (specifically the temperature sensor 21 and the gasoline sensor 22) arranged at each fire monitoring point 1 can also be connected into a whole through the controller 10. In addition, the present invention also provides Figure 7 as well as Figure 8 As shown, the circuit diagram shows that the solenoid valves (the first control valve 8 and the second control valve 9) are controlled by the temperature sensor 21 and the gasoline sensor 22 respectively. Figure 8In the figure: IC1 is μA7815, IC2 is LM311, VT1 is 2SC2002, the gasoline sensor is a gas sensor, its model is TGS813, RT (thermistor) is MZS1Y, RP (adjustable resistor) is WT2C, C1, C2 (electrolytic capacitors) are CD22, R1-R7 (resistors) are RT1, and the solenoid valve is TM54-15HP; Figure 7 Among them, A1 is TA75458F, A2 is TA75458, VD1 (rectifier diode) is 1N4007, VT1 (voltage regulator diode) is 1N4742, VT1 is 2SC1815, R1-R6 (resistance) is RT1, and the solenoid valve is TM54-15HP.

[0062] When in use, when the temperature sensor 21 at a certain fire monitoring point 1 of the vehicle detects a fire, the gasoline sensor 22 determines whether the fire type is an oil fire. For example, if it is an oil fire, the controller 10 starts and controls the working state of the corresponding first control valve 8, so that the dry powder pipeline 11 corresponding to the fire monitoring point 1 is connected to the dry powder storage tank 3, so that the dry powder stored in the dry powder storage tank 3 is sprayed out and flows to the fire monitoring point 1 under the pressure of compressed air to achieve the purpose of extinguishing the flame. Similarly, when the fire type is an ordinary fire, the controller 10 starts and controls the working state of the corresponding second control valve 9, so that the foam pipeline 12 corresponding to the fire monitoring point 1 is connected to the foam fire extinguishing agent storage tank 4, so that the foam fire extinguishing agent stored in the foam fire extinguishing agent storage tank 4 is sprayed out and flows to the fire monitoring point 1 under the pressure of compressed air to achieve the purpose of extinguishing the flame.

[0063] In this embodiment, in order to improve the fire extinguishing capability, a plurality of dry powder storage tanks 3 and a plurality of foam fire extinguishing agent storage tanks 4 may be provided on the vehicle 100, thereby increasing the storage capacity of the corresponding fire extinguishing agent. The plurality of dry powder storage tanks 3 and the plurality of foam fire extinguishing agent storage tanks 4 are respectively fixedly mounted on the plurality of brackets 13, thereby achieving the function of nearby installation and nearby provision of fire extinguishing agent. Figure 2 As shown, each bracket 13 is equipped with a dry powder storage tank 3 and a foam fire extinguishing agent storage tank 4. Figure 5 As shown, three fire monitoring points 1 are set, and each fire monitoring point 1 is equipped with a dry powder storage tank 3 for providing dry powder fire extinguishing agent and a foam storage tank 4 for providing foam fire extinguishing agent. It can be understood that different numbers of dry powder pipelines 11 and foam pipelines 12 can be connected to each dry powder storage tank 3 or foam fire extinguishing agent storage tank 4 according to actual needs, so as to reasonably distribute the fire extinguishing agent.

[0064] Generally, in order to prevent the higher temperature in the engine compartment from affecting the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4, in this embodiment, a fireproof insulation layer is wrapped around the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4, and the material of the insulation layer can be rock wool or perlite.

[0065] This "dual" sensor controls different fire extinguishing agents in the fire extinguishing device. The purpose is to put out the fire with the most optimized fire extinguishing agent at the first time according to the different causes of the fire, so as to effectively protect the safety of people and property in the moving vehicle. This device is also suitable for fire extinguishing of various passenger cars, cargo cars and new energy vehicles.

[0066] Embodiment 2

[0067] The difference between the embodiment 1 and the embodiment 1 is that: in the embodiment, the above-mentioned dry powder storage tank 3 and foam fire extinguishing agent storage tank 4 are both atmospheric pressure storage tanks, so the temperature of the engine compartment has little effect on the pressure inside them, so the outer insulation layer can be omitted, but in the embodiment, the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4 are both equipped with an external pressurizing device 5, and the external pressurizing device 5 provides pressure for the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4, so that the dry powder or foam fire extinguishing agent inside them is sprayed out to extinguish the fire. The external pressurizing device 5 is fixedly mounted on the above-mentioned bracket 13, and the external pressurizing device 5 is electrically connected to the controller 10, such as Fig.10 Specifically in this embodiment, the external pressurizing device 5 is set as an air pump, such as Fig. 9 As shown, the output ends of the two air pumps are respectively connected to the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4 to provide pressure for both.

[0068] In terms of the input power configuration of the air pump, a motor can be installed on the vehicle 100, and the motor is mechanically connected to the air pump through a belt or a coupling. At the same time, the motor is electrically connected to the battery of the vehicle 100 through a wire or a cable. Correspondingly, the motor is also electrically connected to the controller 10, so as to receive the control signal sent by the controller 10, so that the air pump pressurizes the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4 at the appropriate time to spray the dry powder or foam fire extinguishing agent inside.

[0069] From the perspective of reducing costs, multiple storage tanks (dry powder storage tanks 3 or foam fire extinguishing agent storage tanks 4) can share one external pressurizing device 5. In terms of specific implementation, one feasible way is to first install a multi-way connector at the gas outlet of the external pressurizing device 5, and then connect the above multiple storage tanks to the multi-way connector through air pipes, and install a control valve for each air pipe, and the controller 10 controls the on-off state of each control valve. Of course, in another embodiment, each dry powder storage tank 3 and foam fire extinguishing agent storage tank 4 can also be equipped with an external pressurizing device 5.

[0070] When in use, when the temperature sensor 21 at a certain fire monitoring point 1 of the vehicle detects a fire, the gasoline sensor 22 determines whether the fire type is an oil fire or a common fire. For example, if it is an oil fire, the controller 10 starts and controls the working state of the corresponding first control valve 8, so that the dry powder pipeline 11 corresponding to the fire monitoring point 1 is connected to the dry powder storage tank 3;

[0071] Afterwards, the external pressurizing device 5 (air pump) is started. When multiple storage tanks share one air pump, the controller 10 also controls the operation of the on-off state of the corresponding control valve. The air pump pumps gas to the corresponding storage tank to pressurize it, so that the dry powder or foam fire extinguishing agent flows out under pressure and flows to the above-mentioned fire monitoring point 1 to achieve the purpose of extinguishing the flame.

[0072] Embodiment 3

[0073] The difference between the embodiment 1 and the second embodiment is that in the embodiment 1, the input power configuration of the air pump is based on the existing engine of the vehicle 100 and is driven by the engine.

[0074] In terms of specific implementation, a feasible way is to set a slide rail on the vehicle 100, and set a slider used in conjunction with the slide rail on the base of the air pump, so that the air pump can be slidably installed on the vehicle 100. At the same time, a linear drive mechanism for driving the air pump to slide, such as an electric push rod or a cylinder, is fixedly installed on the vehicle 100. At the same time, a belt pulley is also installed on the rotating shaft of the air pump, and the belt pulley is used to contact the engine belt when the air pump is in one position to receive the power of the engine, so that the air pump is out of contact with the engine belt when it is in another position. Correspondingly, a linear drive mechanism is set to be electrically connected to the above-mentioned controller 10 to ensure that when fire extinguishing is required, the controller 10 controls the linear drive mechanism, so that the air pump is pushed to a position where it can receive the power of the engine, thereby providing pressure for the corresponding storage tank.

[0075] Embodiment 4

[0076] The difference between the third embodiment and the third embodiment is that the way in which the air pump receives the engine power is different from that in the third embodiment. In the present embodiment, in terms of specific implementation, a feasible way is that the base of the air pump is fixedly mounted on the vehicle 100 by bolts, the air pump is connected to the output shaft of the engine by an electromagnetic clutch, and the electromagnetic clutch is electrically connected to the controller 10.

[0077] When in use, the controller 10 controls the clutch state of the electromagnetic clutch to make the air pump take on or not take on the power provided by the engine, thereby providing pressure to the storage tank when fire extinguishing operations are required, and not providing pressure to the storage tank when fire extinguishing operations are not required.

[0078] Embodiment 5

[0079] The difference between the embodiment 1 and any of the above embodiments is that the embodiment 1 further includes at least one alarm and at least one carbon monoxide sensor disposed inside the passenger compartment of the vehicle 100. In this embodiment, the alarm and the carbon monoxide sensor are each configured as one. The carbon monoxide sensor and the alarm are both electrically connected to the controller 10, and the controller 10 is electrically connected to the engine control system of the vehicle 100. The alarm is preferably a buzzer, so that the occupants can obtain the alarm signal better and more timely.

[0080] When in use, when the carbon monoxide sensor detects that the carbon monoxide content inside the vehicle 100 exceeds the standard, the controller 10 controls the alarm to sound, and when necessary (for example, when the carbon monoxide content reaches a dangerous level, or exceeds the standard for a long time), the controller 10 can also issue a stop instruction to the engine control system.

[0081] Embodiment 6

[0082] A second aspect of the present invention provides a vehicle automatic fire extinguishing method, such as Fig.11 As shown, the following steps are included:

[0083] S1, the controller 10 receives the temperature at the fire monitoring point 1 detected by the temperature sensor 21; wherein the fire monitoring point at least includes the engine compartment 110 and the fuel tank 120 of the vehicle 100; each fire monitoring point 1 is equipped with a temperature sensor 21;

[0084] S2, the controller 10 determines whether the temperature exceeds the first threshold value based on the data detected by the temperature sensor 21. If yes, the fire monitoring point 1 is determined to be the ignition point and the process proceeds to step S3, otherwise, the process returns to step S1; for example, the first threshold value is set to 100, and when the temperature exceeds 100°C, it is determined to be a fire, and the ignition point is the fire monitoring point 1 mentioned above;

[0085] S3, the controller 10 receives the gasoline concentration of the above-mentioned ignition point detected by the gasoline sensor 22; each fire monitoring point 1 is equipped with a gasoline sensor 22 for detecting gasoline concentration;

[0086] S4, the controller determines whether the gasoline concentration exceeds the second threshold value based on the data detected by the gasoline sensor 22. If yes, the controller determines that the ignition point is an oil fire and proceeds to step S5; otherwise, the controller determines that the ignition point is an ordinary fire and proceeds to step S6; for example, the second threshold value is set to 1, then when the gasoline concentration in the air exceeds 1%, the fire type of the ignition point is determined to be an oil fire;

[0087] S5, the controller 10 opens the first control valve 8 on the dry powder pipeline 11, so that the dry powder fire extinguishing agent stored in the dry powder storage tank 3 is delivered to the above-mentioned fire point by pressure delivery; wherein the dry powder pipeline 11 is laid in advance and its two ends are connected to the dry powder storage tank 3 and the fire monitoring point 1 respectively;

[0088] S6. The controller 10 opens the second control valve 9 on the foam pipe 12, so that the foam fire extinguishing agent stored in the foam fire extinguishing agent storage tank 4 is delivered to the above-mentioned fire point by pressure delivery; wherein, the foam pipe 12 is laid in advance and its two ends are respectively connected to the dry powder storage tank 4 and the above-mentioned fire monitoring point 1.

[0089] Preferably, after step S5, the method further includes step S506:

[0090] S506, the controller 10 records the duration of the temperature value exceeding the first threshold value, and detects whether the duration exceeds the third threshold value, and if so, proceeds to step S6. For example, the third threshold value is set to 20s. When the real-time temperature detected by the temperature sensor 21 exceeds 100°C for 20s, the controller 10 synchronously performs the operation of step S6 to put the foam fire extinguishing agent into the fire, thereby ensuring that the fire is extinguished as soon as possible. Fig.12 shown.

[0091] Similarly, step S605 may be added after step S6:

[0092] Step S605: The controller 10 records the duration of the gasoline concentration value exceeding the second threshold value, and detects whether the duration exceeds the fourth threshold value. If so, the controller 10 performs step S5 simultaneously. For example, the fourth threshold value is set to 30 seconds. When the real-time temperature detected by the temperature sensor 21 exceeds 1% within 30 seconds, the controller 10 performs step S5 simultaneously, so that the dry powder fire extinguishing agent is also put into the fire, thereby ensuring that the fire is extinguished as soon as possible. Fig.13 shown.

[0093] Normally, when the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4 convey the fire extinguishing medium by pressurizing the same through the external pressurizing device 5, the flame caused by the vehicle fire may affect the normal operation of the external pressurizing device 5. Therefore, in order to avoid the external pressurizing device 5 from being unable to be used normally when a fire occurs, it is preferred that when the pressure conveying method described in step S4 and / or step S5 is to provide pressure through an external pressurizing device, step S102 is further included between step S1 and step S2.

[0094] Step S102, the controller 10 determines whether the temperature exceeds the fifth threshold value based on the data detected by the temperature sensor 21, and the fifth threshold value is less than the first threshold value, preferably 70°C. When the temperature exceeds the fifth threshold value, the controller 10 controls the external pressurizing device 5 that provides pressure for the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4 to work, thereby pre-pressurizing to ensure that the dry powder storage tank 3 and the foam fire extinguishing agent storage tank 4 have sufficient pressure when the temperature continues to rise and causes a fire; and enters step S2 at the same time. When the temperature does not exceed the fifth threshold value, step S1 is performed.

[0095] In the above implementation plan, what is more humane is that in order to allow the driver and passengers to understand the cause of the fire, the extent of the fire, the extinguishing situation, etc. at the first time, a video probe can be installed near each set of "dual sensors". When a fire occurs, it will directly switch to the large control screen in the center of the instrument panel, and it can also be displayed on the instrument panel with (voice, text) prompts, so that the driver can see it at a glance and take decisive, effective and reasonable measures.

[0096] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A vehicle automatic fire extinguishing system, characterized in that: include: Fire monitoring points, the fire monitoring points are at least arranged at the engine compartment and fuel tank of the vehicle, each of the fire monitoring points is provided with a sensor group, the sensor group includes at least one temperature sensor and at least one gasoline sensor; A dry powder storage tank, which is arranged on the vehicle and contains dry powder. The dry powder storage tank is a pressure tank or is connected to an external pressurizing device; A foam fire extinguishing agent storage tank, which is arranged on the vehicle, and stores foam fire extinguishing agent inside the foam fire extinguishing agent storage tank, and the foam fire extinguishing agent storage tank is a pressure storage tank or is connected to an external pressurizing device; A dry powder spraying point, wherein the dry powder spraying point is arranged at each fire monitoring point and connected to the dry powder storage tank via a dry powder pipeline; A foam spraying point, wherein the foam spraying point is arranged at each fire monitoring point and connected to the foam fire extinguishing agent storage tank through a foam pipe; a first control valve, the first control valve being installed on the dry powder pipeline and being used to control the communication state between the dry powder spraying point and the dry powder storage tank; a second control valve, the second control valve being installed on the foam pipe and used for controlling the communication state between the foam spraying point and the foam fire extinguishing agent storage tank; A controller is electrically connected to the temperature sensor, the gasoline sensor, the external pressurizing device, the first control valve, and the second control valve, and is used to control the working states of the external pressurizing device, the first control valve, and the second control valve according to data from the temperature sensor and the gasoline sensor.

2. The vehicle automatic fire extinguishing system according to claim 1, characterized in that: The first control valve and the second control valve are both one-inlet and multiple-outlet solenoid valves, the inlet of the one-inlet and multiple-outlet solenoid valve is used to connect to the dry powder storage tank or the foam fire extinguishing agent storage tank, and the outlet is used to connect to the dry powder pipeline or the foam pipeline.

3. The vehicle automatic fire extinguishing system according to claim 1, characterized in that: The external pressurizing device is an air pump.

4. The vehicle automatic fire extinguishing system according to claim 3, characterized in that: The air pump is driven by the engine of the vehicle, or the air pump is connected to a motor and the motor is powered by a battery of the vehicle.

5. The vehicle automatic fire extinguishing system according to claim 4, characterized in that: The air pump is slidably mounted on the vehicle, a linear drive mechanism for driving the air pump to slide is fixedly mounted on the vehicle, and the air pump is connected to a belt pulley matched with the engine belt.

6. The vehicle automatic fire extinguishing system according to claim 1, characterized in that: The dry powder storage tank is coated with a heat-insulating layer.

7. The vehicle automatic fire extinguishing system according to any one of claims 1 to 6, characterized in that: It also includes an alarm and at least one carbon monoxide sensor arranged inside the vehicle, wherein the carbon monoxide sensor and the alarm are both electrically connected to the controller, and the controller is electrically connected to the engine control system of the vehicle.

8. A vehicle automatic fire extinguishing method based on the vehicle automatic fire extinguishing system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Receiving the temperature at a fire monitoring point detected by a temperature sensor; wherein the fire monitoring point includes at least the engine compartment and fuel tank position of the vehicle; S2, determining whether the temperature exceeds a first threshold value, if yes, determining that the fire monitoring point is a fire starting point and proceeding to step S3, otherwise returning to step S1; S3, receiving the gasoline concentration at the ignition point detected by the gasoline sensor; S4, judging whether the gasoline concentration exceeds a second threshold value, if yes, judging the ignition point to be an oil fire and proceeding to step S5, otherwise judging the ignition point to be an ordinary fire and proceeding to step S6; S5, opening the first control valve on the dry powder pipeline, so that the dry powder fire extinguishing agent stored in the dry powder storage tank is delivered to the fire point by pressure delivery; wherein the dry powder pipeline is laid in advance and its two ends are connected to the dry powder storage tank and the fire monitoring point respectively; S6. Open the second control valve on the foam pipeline to deliver the foam fire extinguishing agent stored in the foam fire extinguishing agent storage tank to the fire point by pressure delivery; wherein the foam pipeline is laid in advance and its two ends are respectively connected to the dry powder storage tank and the fire monitoring point.

9. The vehicle automatic fire extinguishing method according to claim 8, characterized in that: After step S5, the method further includes step S506: S506, record the duration that the temperature value exceeds the first threshold, and detect whether the duration exceeds a third threshold, if yes, proceed to step S6.

10. The vehicle automatic fire extinguishing method according to claim 8, characterized in that: When the pressure delivery method in step S4 and / or step S5 is to provide pressure through an external pressurizing device, step S102 is further included between step S1 and step S2. S102, determining whether the temperature exceeds a fifth threshold, if yes, starting the external pressurizing device and proceeding to step S2, otherwise proceeding to step S1.

Images