A kind of automatic spraying fire extinguishing explosion-proof automobile charging pile with aerosol material thermal induction

Abstract

The application discloses a kind of automatic spraying fire extinguishing explosion-proof automobile charging pile with aerosol material thermal induction, including thermal induction sensor and explosion-proof module, explosion-proof module is arranged in the inside of charging pile, thermal induction sensor meets certain high temperature and automatically triggers explosion-proof module, solid granular aerosol contained in the inside of explosion-proof module is rapidly converted into hot aerosol and is quickly sprayed, and is heated and decomposed reaction in the moment of meeting high temperature, generates a large amount of inert chemical cooling material, with smoke-like microparticle agent rapidly full-flooded fire extinguishing to the inside and outside of charging pile.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of charging pile fire and explosion prevention. BACKGROUND

[0002] The current and load inside the charging pile are very large during the charging process, especially for the fast charging pile. Once the charging pile catches fire, the fire will spread rapidly. On the other hand, the electric vehicle being charged in front of the charging pile may catch fire during the charging process. Once the electric vehicle in front of the charging pile catches fire, the fire will also spread rapidly to the charging pile. Therefore, a scheme of active fire extinguishing and combustion supporting is needed to take into account the above two cases. SUMMARY

[0003] The application aims to overcome the deficiencies in the prior art and provides an aerosol material thermal induction automatic spraying fire extinguishing and explosion prevention automobile charging pile, which can effectively prevent the spread of fire.

[0004] Technical scheme: To achieve the above purpose, the aerosol material thermal induction automatic spraying fire extinguishing and explosion prevention automobile charging pile comprises a charging pile, a thermal induction sensor and an aerosol-based fire extinguishing and explosion prevention module. The aerosol-based fire extinguishing and explosion prevention module is arranged inside the charging pile. The thermal induction sensor automatically triggers the aerosol-based fire extinguishing and explosion prevention module when it encounters a temperature exceeding a certain high temperature. The thermal induction sensor comprises a thermal induction sensor a and a heat source sensor b. The thermal induction sensor a is installed inside the charging pile. The heat source sensor b is installed on one side of the charging pile and faces the electric vehicle being charged.

[0005] Further, the aerosol-based fire extinguishing and explosion prevention module comprises a state a and a state b. The fire-retardant spray sprayed by the aerosol-based fire extinguishing and explosion prevention module in the state a is sprayed towards the electric vehicle being charged in front of the charging pile. The state b is transformed from the state a, and the fire-retardant spray sprayed by the aerosol-based fire extinguishing and explosion prevention module in the state b is sprayed into the housing of the charging pile.

[0006] Further, the state a is the normal state. When the heat source sensor b detects that the surface temperature of the electric vehicle being charged exceeds a threshold value, the aerosol-based fire extinguishing and explosion prevention module sprays the fire-retardant spray based on the state a. When the thermal induction sensor a detects that the temperature inside the charging pile exceeds a threshold value, the aerosol-based fire extinguishing and explosion prevention module switches from the state a to the state b, and then sprays the fire-retardant spray based on the state b.

[0007] Furthermore, the charging pile includes a charging pile main unit box, with an air inlet box fixedly connected to the bottom of the main unit box; the lower end of the main chamber inside the charging pile main unit box is connected to the upper end of the air inlet box; the front wall of the air inlet box includes an upper front wall and a lower front wall, with an array of air inlets perforated on the lower front wall; a negative pressure exhaust fan is installed on one side of the upper end of the main unit box.

[0008] Furthermore, the upper front wall has an array of perforated flame retardant outlets; the flame retardant spray ejected from the flame retardant outlet array will be sprayed toward the car that is charging in front of the charging pile.

[0009] Aerosol-based fire extinguishing and explosion-proof modules include box-type aerosol fire extinguishing devices.

[0010] In state a, the front side, upper side and lower side of the box-type aerosol fire extinguishing device are referred to as surface a, surface b and surface c, respectively; surface a of the box-type aerosol fire extinguishing device is in contact with the inner wall of the upper front wall, and the surface a of the box-type aerosol fire extinguishing device has an array of flame retardant injection ports, and the array of flame retardant injection ports and the array of flame retardant outlets are interconnected.

[0011] Furthermore, in state a, the lower, right and upper sides of the box-type aerosol fire extinguishing device form chamber a, chamber b and chamber c respectively; external air enters from the air inlet array and passes through chamber a, chamber b and chamber c in sequence to reach the main chamber of the charging pile host box.

[0012] Furthermore, the connection between the upper front wall and the lower front wall is integrally connected by an outwardly convex arc wall; a rotating shaft is coaxially mounted on the inner side of the outwardly convex arc wall, and the lower end of the a-side of the box-type aerosol fire extinguishing device is fixed to the rotating shaft along the length direction. The two ends of the rotating shaft are rotatably fitted into the rotating holes on both sides of the air inlet box; the box-type aerosol fire extinguishing device tends to rotate clockwise along the rotating shaft under its own gravity.

[0013] Furthermore, a movable plate that can slide longitudinally is parallel to the inner side of the upper front wall; a slot is provided on one side of the upper end of the movable plate, and a locking block is inserted into the slot; an electric telescopic device is fixedly installed on the inner wall of the charging pile main unit box, and the telescopic rod of the electric telescopic device is connected to the locking block; when the telescopic rod is extended, the locking block is horizontally inserted into the slot, thereby completely positioning the movable plate; a horizontal anti-rotation plate is vertically fixedly connected to the lower end of the movable plate. In state a, the lower surface of the anti-rotation plate is parallel and in contact with surface b of the box-type aerosol fire extinguishing device. When the locking block is horizontally inserted into the slot, the anti-rotation plate prevents the box-type aerosol fire extinguishing device from rotating clockwise along the axis of rotation under its own gravity.

[0014] Furthermore, when the telescopic rod retracts, the locking block disengages from the slot, allowing the movable plate to return to a state where it can move freely up and down. This releases the constraint of the anti-rotation plate on the box-type aerosol fire extinguishing device. Under its own gravity, the box-type aerosol fire extinguishing device rotates clockwise along the axis by °, entering state b. Simultaneously, during the initial stage of the box-type aerosol fire extinguishing device rotating clockwise along the axis under its own gravity, the movable plate experiences an upward thrust, causing it to move upwards adaptively. Then, under gravity, it falls until the lower end of the movable plate contacts the axis, at which point the movable plate stops descending. At this point, the descending movable plate blocks all the flame retardant outlet arrays. After the box-type aerosol fire extinguishing device rotates clockwise along the axis by ° under its own gravity, the c-side of the box-type aerosol fire extinguishing device blocks the air inlet array, and the flame retardant spray nozzle array on the a-side of the box-type aerosol fire extinguishing device is connected to the ventilation box cavity in an upward-facing state.

[0015] Beneficial effects: In the first case, the aerosol flame retardant sprayed from the flame retardant injection port array is sprayed towards the car through the flame retardant outlet array, thereby suppressing the car's combustion intensity and preventing the fire from spreading to the charging pile; in the second case, the aerosol flame retardant is sprayed from the flame retardant injection port array into the ventilation box cavity in the form of a jet. Since the air inlet array and the flame retardant outlet array are both blocked at this time, the aerosol flame retardant sprayed into the ventilation box cavity will only flow upward into the main chamber of the main unit. When the aerosol flame retardant encounters high temperature in the main chamber, it will undergo an instantaneous thermal decomposition reaction, producing a large amount of inert chemical cooling substances, which rapidly and completely flood the interior of the charging pile with smoke-like micro-particle agents. Attached Figure Description

[0016] Appendix Figure 1 This is a front view of the charging station as a whole.

[0017] Appendix Figure 2 This is a side view of the charging station;

[0018] Appendix Figure 3 This is a schematic diagram for the "first scenario";

[0019] Appendix Figure 4 This is a schematic diagram of ventilation and cooling during the operation of a charging pile.

[0020] Appendix Figure 5 This is a schematic diagram of the internal structure in state a;

[0021] Appendix Figure 6 For the appendix Figure 4 A-direction sectional view;

[0022] Appendix Figure 7 This is a schematic diagram of a box-type aerosol fire extinguishing device rotating clockwise along its axis under its own gravity.

[0023] Appendix Figure 8 This is a schematic diagram of state b;

[0024] Appendix Figure 9 This is a schematic diagram showing the box-type aerosol fire extinguishing device after being separated and disassembled from the ventilation box.

[0025] Appendix Figure 10 This is a schematic diagram of the fire extinguishing and control process. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] As attached Figures 1 to 10 The illustrated car charging pile with automatic fire extinguishing and explosion protection based on aerosol material thermal sensing includes a charging pile, a thermal sensor, and an aerosol-based fire extinguishing and explosion protection module. The aerosol-based fire extinguishing and explosion protection module is installed inside the charging pile. The thermal sensor automatically triggers the aerosol-based fire extinguishing and explosion protection module when it encounters a certain high temperature. The thermal sensor includes a thermal sensor (a) and a heat source sensor (b). The heat source sensor (b) is an infrared thermal sensor that can scan the temperature of the area in front in real time. The thermal sensor (a) is installed inside the charging pile to monitor the temperature inside the charging pile in real time. The heat source sensor (b) is installed on one side of the charging pile and faces the car 30 that is being charged, thereby monitoring the surface temperature of the car 30 that is being charged in real time.

[0028] The aerosol-based fire extinguishing and explosion-proof module includes state a and state b. In state a, the flame-retardant sprayed by the aerosol-based fire extinguishing and explosion-proof module will be sprayed towards the car 30 that is charging in front of the charging pile. State b is a transformation from state a, and the flame-retardant sprayed in state b will be sprayed into the interior of the charging pile housing, so that the interior of the charging pile housing is filled with flame-retardant material in the form of aerosol.

[0029] State a is the normal state; when the heat source sensor detects that the surface temperature of the charging vehicle 30 exceeds the threshold, the aerosol-based fire extinguishing and explosion-proof module sprays flame-retardant material based on state a; when the thermal sensor detects that the internal temperature of the charging pile exceeds the threshold, the aerosol-based fire extinguishing and explosion-proof module switches from state a to state b, and then the aerosol-based fire extinguishing and explosion-proof module sprays flame-retardant material based on state b.

[0030] The specific structure of this scheme is as follows:

[0031] The charging pile comprises a charging pile host box 6, and an air inlet box body 2 is integrally and fixedly connected below the host box 6; the lower end of a main cavity 17 in the host box 6 is communicated with the upper end of the air inlet box body 2; the front wall of the air inlet box body 2 comprises an upper front wall 2.1 and a lower front wall 2.2, and a plurality of air inlet arrays 4.2 are arrayed and hollowed out on the upper front wall 2.1; a negative pressure air extractor 33 is arranged on one side of the upper end of the host box 6; when the negative pressure air extractor operates, negative pressure is generated in the main cavity 17, and the cold air outside enters the air inlet box body 2 through the air inlet arrays 4.2 under the action of the negative pressure; and an aerosol-based fire extinguishing and explosion prevention module is arranged in the air inlet box body 2.

[0032] A plurality of fire retardant outlet arrays 4.1 are arrayed and hollowed out on the upper front wall 2.1; the fire retardant spraying objects sprayed from the fire retardant outlet arrays 4.1 are sprayed towards the automobile 30 being charged in front of the charging pile;

[0033] The aerosol-based fire extinguishing and explosion prevention module comprises a box-type aerosol fire extinguishing device 3; the specific structure of the box-type aerosol fire extinguishing device 3 for generating aerosol-like fire extinguishing and combustion-supporting substances is the existing structure; because the aerosol-based fire extinguishing device has been widely applied in the field of fire extinguishing, the present scheme will not be repeated.

[0034] In the a state, as Figure 4 , 5 , 6, the front side, upper side and lower side of the box-type aerosol fire extinguishing device 3 are respectively denoted as a face 3.1, b face 3.2 and c face 3.3; the a face 3.1 of the box-type aerosol fire extinguishing device 3 is attached to the inner wall surface of the upper front wall 2.1, and the a face 3.1 of the box-type aerosol fire extinguishing device 3 is distributed with fire retardant spraying port arrays 4.3, as Figure 9 , and the fire retardant spraying port arrays 4.3 and the fire retardant outlet arrays 4.1 are communicated with each other; when the box-type aerosol fire extinguishing device 3 is triggered, the aerosol fire retardant in the box-type aerosol fire extinguishing device 3 is sprayed in the form of a jet from the fire retardant spraying port arrays 4.3.

[0035] In the a state, the lower side, right side and upper side of the box-type aerosol fire extinguishing device 3 form a cavity 1.1, b cavity 1.2 and c cavity 1.3 respectively; after the external air enters from the air inlet arrays 4.2, the external air passes through the a cavity 1.1, b cavity 1.2 and c cavity 1.3 in sequence to reach the main cavity 17 of the host box 6 of the charging pile.

[0036] The connection between the upper front wall 2.1 and the lower front wall 2.2 is integrally connected through an outer convex arc wall 11; the inner side of the outer convex arc wall 11 is coaxially and rotationally provided with a rotating shaft 7, the lower end of the a face 3.1 of the box-type aerosol fire extinguishing device 3 is fixed along the length direction of the rotating shaft 7, and the two ends of the rotating shaft 7 are rotationally fitted in rotating holes 8 on the two sides of the air inlet box body 2; the box-type aerosol fire extinguishing device 3 has a tendency to rotate in the clockwise direction along the rotating shaft 7 under the action of its own gravity;

[0037] The upper inner side of the upper front wall 2.1 is slidably fitted with a movable plate 5 which can slide longitudinally, the movable plate 5 is made of light non-combustible material, and at least two pairs of guide rollers 9 are arranged on the side of the movable plate 5 close to the cavity 1.3, the wheel shafts of the guide rollers 9 are installed on the wall of the air inlet box 2 through a support, and the movable plate 5 slides longitudinally under the constraint of the at least two pairs of guide rollers 9 with low resistance.

[0038] A clamping groove 12 is arranged on one side of the upper end of the movable plate 5, a clamping block 12 is clamped in the clamping groove 12, an electric telescopic device 15 is fixedly installed on the inner wall of the charging pile host box 6, and the telescopic rod 14 of the electric telescopic device 15 is connected with the clamping block 12; when the telescopic rod 14 is extended, the clamping block 12 is transversely clamped in the clamping groove 12, so that the movable plate 5 is completely positioned; a horizontal rotation stopping plate 10 is vertically and fixedly connected to the lower end of the movable plate 5, and in the a state, the lower surface of the rotation stopping plate 10 is parallel to and attached to the b surface 3.2 of the box-type aerosol fire extinguishing device 3; in the state that the clamping block 12 is transversely clamped in the clamping groove 12, the rotation stopping plate 10 prevents the box-type aerosol fire extinguishing device 3 from rotating in the clockwise direction along the rotation shaft 7 under the action of its own gravity.

[0039] When it is needed to enter the b state, the telescopic rod 14 is retracted, the clamping block 12 is separated from the clamping groove 12, so that the movable plate 5 returns to the state of being freely movable up and down, and the constraint of the rotation stopping plate 10 on the box-type aerosol fire extinguishing device 3 is released, the box-type aerosol fire extinguishing device 3 rotates 90° in the clockwise direction along the rotation shaft 7 under the action of its own gravity, and enters the b state, as shown in Figure 8 .

[0040] At the same time, the movable plate 5 will be subjected to an upward thrust at the initial stage of the rotation of the box-type aerosol fire extinguishing device 3 in the clockwise direction along the rotation shaft 7 under the action of its own gravity, and then adaptively moves upward by a distance, and then falls under the action of gravity until the lower end of the movable plate 5 contacts the rotation shaft 7, and the movable plate 5 stops falling, at this time, the movable plate 5 after falling blocks all the retardant outlet arrays 4.1; as shown in Figure 8 .

[0041] After the box-type aerosol fire extinguishing device 3 rotates 90° in the clockwise direction along the rotation shaft 7 under the action of its own gravity, the c surface 3.3 of the box-type aerosol fire extinguishing device 3 blocks the air inlet array 4.2, and the retardant injection port array 4.3 on the a surface 3.1 of the box-type aerosol fire extinguishing device 3 is in communication with the inner cavity of the air inlet box 2 in the upward state.

[0042] Working principle: in the normal state, the box-type aerosol fire extinguishing device 3 is in the a state, as shown in Figure 4 , 5, 6; when the electric vehicle 30 drives to the charging pile of the present scheme directly in front, the user takes the charging gun and inserts it into the charging port of the electric vehicle 30 to charge, a thermal induction sensor monitors the temperature inside the charging pile in real time; b heat source sensor on one side of the charging pile and towards the car 30 being charged, real-time monitoring of the surface temperature of the car 30 being charged; the following two cases may occur:

[0043] The first case: if the b heat source sensor monitors that the surface temperature of the car 30 being charged in front of a large range exceeds the threshold value, it means that the car 30 being charged directly in front of the charging pile has caught fire, at this time without controlling the telescopic rod 14 to retract, directly control the box type aerosol fire extinguishing device 3, the aerosol fire retardant is sprayed from the fire retardant injection port array 4.3 in the form of a jet, because in state a, the fire retardant injection port array 4.3 and the fire retardant outlet array 4.1 are interconnected, and the front of the fire retardant outlet array 4.1 corresponds to the car 30 that has caught fire, therefore the aerosol fire retardant sprayed from the fire retardant injection port array 4.3 is sprayed to the car 30 in front through the fire retardant outlet array 4.1, thereby inhibiting the burning intensity of the car and preventing the fire from spreading to the charging pile;

[0044] The second case: if the a thermal induction sensor monitors that the temperature inside the charging pile exceeds the threshold value, it means that high temperature has occurred inside the charging pile, even burning, at this time the telescopic rod 14 is controlled to retract, the clamping block 12 is separated from the clamping groove 12, so that the movable plate 5 returns to the state of freely moving up and down, and the restraint of the box type aerosol fire extinguishing device 3 by the rotation limiting plate 10 is released, the box type aerosol fire extinguishing device 3 automatically rotates 90° along the rotation shaft 7 in the clockwise direction under the action of its own gravity; At the same time, the movable plate 5 will be pushed upward in the initial stage of the rotation of the box type aerosol fire extinguishing device 3 along the rotation shaft 7 in the clockwise direction under the action of its own gravity, and then falls under the action of gravity until the lower end of the movable plate 5 contacts the rotation shaft 7, and the movable plate 5 stops falling, at this time the movable plate 5 after falling blocks all the fire retardant outlet arrays 4.1;

[0045] After the box type aerosol fire extinguishing device 3 rotates 90° along the rotation shaft 7 in the clockwise direction under the action of its own gravity, the c surface 3.3 of the box type aerosol fire extinguishing device 3 blocks the air inlet array 4.2, and the fire retardant injection port array 4.3 on the a surface 3.1 of the box type aerosol fire extinguishing device 3 is in a state of upward communication with the inner cavity of the air tank 2; At this time, it is in state b, as shown in Figure 8 ;

[0046] Subsequently, the box type aerosol fire extinguishing device 3 is controlled to make the aerosol fire retardant spray out from the fire retardant spray port array 4.3 in the form of a jet into the inner cavity of the ventilation box 2. Since the air inlet array 4.2 and the fire retardant outlet array 4.1 are both in the blocking state at this time, the aerosol fire retardant sprayed into the inner cavity of the ventilation box 2 will only all gush upward into the main cavity 17 in the main cabinet 6, and the aerosol fire retardant will be instantaneously decomposed by heat when it meets the high temperature in the main cavity 17, generating a large amount of inert chemical cooling substances to rapidly and fully immerse the charging pile in a smoke-like micro-particle agent for full immersion fire extinguishing. The aerosol fire extinguishing principle is that the metal salt particles absorb a large amount of heat at high temperature, undergo heat melting, gasification and other physical heat absorption processes, the flame temperature is reduced, and then radiated to the combustible surface to reduce the heat for gasifying combustible molecules and cracking the gasified combustible molecules into free radicals, and the combustion reaction speed is inhibited to a certain extent. The particles in the fire extinguishing aerosol have a large surface area and surface energy, can adsorb active groups in combustion, and undergo chemical action, consume a large amount of active groups, and reduce combustion free radicals. N2 and CO2 in the fire extinguishing aerosol can reduce the oxygen concentration in combustion, but the speed is slow, and the fire extinguishing effect is far less than the heat absorption and temperature reduction and chemical inhibition.

[0047] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A kind of hot induction automatic spraying fire extinguishing explosion-proof automobile charging pile with aerosol material, it is characterized by: Including charging pile, heat induction sensor and aerosol-based fire extinguishing explosion-proof module, the aerosol-based fire extinguishing explosion-proof module is arranged inside the charging pile, the heat induction sensor includes a heat induction sensor and b heat source sensor, the a heat induction sensor is installed inside the charging pile, the b heat source sensor is installed on one side of the charging pile and faces the car (30) being charged; The front wall of the air inlet box body (2) of the charging pile includes an upper front wall (2.1) and a lower front wall (2.2), and a plurality of air inlet arrays (4.2) are arrayed and hollowed out on the lower front wall (2.2); The upper front wall (2.1) is arrayed and hollowed out with a fire retardant outlet array (4.1); the fire retardant spray ejected from the fire retardant outlet array (4.1) will be sprayed to the car (30) being charged in front of the charging pile; The aerosol-based fire extinguishing explosion-proof module includes a box-type aerosol fire extinguishing device (3); The a face (3.1) of the box-type aerosol fire extinguishing device (3) is attached to the inner wall surface of the upper front wall (2.1), and the a face (3.1) of the box-type aerosol fire extinguishing device (3) is distributed with a fire retardant injection port array (4.3), and the fire retardant injection port array (4.3) and the fire retardant outlet array (4.1) are in communication with each other; The upper inner side of the upper front wall (2.1) is slidably fitted with a movable plate (5) which can slide longitudinally; the upper end of the movable plate (5) is provided with a clamping groove (12), the clamping groove (12) is clamped with a clamping block (13), the inner wall of the charging pile host box (6) is fixedly installed with an electric telescopic device (15), the telescopic rod (14) of the electric telescopic device (15) is connected with the clamping block (13); when the telescopic rod (14) is extended, the clamping block (13) is clamped into the clamping groove (12) transversely, so that the movable plate (5) is completely positioned; the lower end of the movable plate (5) is vertically fixedly connected with a horizontal rotation stop plate (10), in the a state, the lower surface of the rotation stop plate (10) is parallel and attached to the b face (3.2) of the box-type aerosol fire extinguishing device (3), and in the state that the clamping block (13) is clamped into the clamping groove (12) transversely, the rotation stop plate (10) prevents the box-type aerosol fire extinguishing device (3) from rotating in the clockwise direction along the rotation shaft (7) under the action of its own gravity; When the telescopic rod (14) is retracted, the clamping block (13) is disengaged from the clamping groove (12), so that the movable plate (5) returns to a freely movable state, and the constraint of the rotation stop plate (10) on the box-type aerosol fire extinguishing device (3) is released. The box-type aerosol fire extinguishing device (3) rotates 90° clockwise along the rotation shaft (7) under the action of its own gravity, and enters the b state; at the same time, the movable plate (5) will be pushed upward at the initial stage of the rotation of the box-type aerosol fire extinguishing device (3) along the rotation shaft (7) under the action of its own gravity, and then moves upward adaptively, and then falls under the action of gravity until the lower end of the movable plate (5) contacts the rotation shaft (7), and the movable plate (5) stops falling, at this time, the movable plate (5) after falling blocks all the flame retardant outlet arrays (4.1); after the box-type aerosol fire extinguishing device (3) rotates 90° clockwise along the rotation shaft (7) under the action of its own gravity, the c surface (3.3) of the box-type aerosol fire extinguishing device (3) blocks the air inlet array (4.2), and the flame retardant injection port array (4.3) on the a surface (3.1) of the box-type aerosol fire extinguishing device (3) is in an upward state and communicates with the inner cavity of the air baffle body (2).

2. The automatic fire extinguishing and explosion-proof charging pile for automobile according to claim 1, characterized in that: The aerosol-based fire extinguishing and explosion-proof module includes a state and a state; the flame-retardant injection material sprayed by the aerosol-based fire extinguishing and explosion-proof module in the a state will be sprayed to the car (30) being charged in front of the charging pile; the b state is transformed from the a state, and the flame-retardant injection material sprayed by the aerosol-based fire extinguishing and explosion-proof module in the b state will be sprayed to the inside of the shell of the charging pile.

3. The automatic fire extinguishing and explosion-proof charging pile for automobile according to claim 2, characterized in that: The a state is a normal state; when the a thermal sensor detects that the surface temperature of the car (30) being charged exceeds a threshold value, the aerosol-based fire extinguishing and explosion-proof module sprays the flame-retardant injection material based on the a state; when the a thermal sensor detects that the temperature inside the charging pile exceeds a threshold value, the aerosol-based fire extinguishing and explosion-proof module switches from the a state to the b state, and then sprays the flame-retardant injection material based on the b state.

4. The automatic fire extinguishing and explosion-proof charging pile for automobile according to claim 3, characterized in that: The charging pile includes a charging pile host box (6), and the lower end of the host box (6) is integrally and fixedly connected with an air inlet box body (2); the lower end of a main cavity (17) in the charging pile host box (6) communicates with the upper end of the air inlet box body (2); and one side of the upper end of the host box (6) is provided with a negative pressure air extractor (33).

5. The automatic fire extinguishing explosion-proof electric pile of the vehicle according to claim 4, wherein: In the a state, the front side, the upper side and the lower side of the box-type aerosol fire extinguishing device (3) are respectively denoted as an a surface (3.1), a b surface (3.2) and a c surface (3.3).

6. The automatic fire extinguishing explosion-proof electric pile of the vehicle according to claim 5, characterized in that: In the a state, the lower side, the right side and the upper side of the box-type aerosol fire extinguishing device (3) form an a cavity (1.1), a b cavity (1.2) and a c cavity (1.3) respectively; after the external air enters from the air inlet array (4.2), the external air passes through the a cavity (1.1), the b cavity (1.2) and the c cavity (1.3) in sequence and reaches the main cavity (17) of the charging pile host box (6).

7. The automatic fire extinguishing explosion-proof electric pile of the aerosol material according to claim 6, characterized in that: The connecting place of the upper front wall (2.1) and the lower front wall (2.2) is integrally connected through the outer convex arc wall (11); the inner side of the outer convex arc wall (11) is coaxially and rotatably provided with a rotating shaft (7), the lower end of the a surface (3.1) of the box type aerosol fire extinguishing device (3) is fixed along the length direction and the rotating shaft (7), and the two ends of the rotating shaft (7) are rotatably matched in the rotating holes (8) on the two sides of the air inlet box body (2); the box type aerosol fire extinguishing device (3) has a tendency to rotate in the clockwise direction along the rotating shaft (7) under the action of its own gravity.

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