Automatic fire-extinguishing type charging pile having multi-point explosion-proof module and automatic fire extinguishing method for automatic fire-extinguishing type charging pile

Abstract

An automatic fire-extinguishing type charging pile having a multi-point explosion-proof module, which charging pile comprises a charging pile cabinet body (2), wherein an electrical bin (1) is arranged inside the charging pile cabinet body (2), aerosol fire extinguishers (6) having an automatic triggering function are respectively installed at multiple points in the electrical bin (1), the aerosol fire extinguishers (6) can release an aerosol flame-retardant substance into the electrical bin (1), and the lateral part of the charging pile cabinet body (2) is provided with a grating ventilation window (3). The aerosol fire extinguishers (6) are distributed in the electrical bin (1) in a multi-point manner, and the interior of the electrical bin (1) can be rapidly submerged in the aerosol flame-retardant substance, thereby achieving the purpose of rapidly extinguishing fires within a short amount of time.

Description

Automatic fire extinguishing charging pile with multi-point explosion-proof module and automatic fire extinguishing method thereof Technical Field

[0001] The invention belongs to the field of charging pile fire extinguishing. Background Art

[0002] In the event of a fire inside the charging pile cabinet, the fire is likely to spread rapidly and may also cause nearby electric vehicles that are charging to burn. Therefore, a fire extinguishing device that can automatically release flame retardant substances needs to be installed inside the charging pile cabinet;

[0003] Using an aerosol fire extinguisher in the charging pile cabinet is a good choice. After the aerosol fire extinguisher is activated, it will automatically release a large amount of flame-retardant aerosols, aerosol-form FK-5-1-12, pearlescent alumina, etc. into the electrical compartment. The electrical compartment will be quickly flooded with aerosol flame retardants, thus achieving the purpose of rapid fire extinguishing in a short period of time; if after this stage, the open flame is quickly extinguished in a short period of time due to the isolation of oxygen by the aerosol mist, the temperature of the combustible materials in the electrical compartment may still be within the ignition point range. If the aerosol in the electrical compartment dissipates quickly, there is a possibility of re-ignition in the electrical compartment. Technical issues

[0004] In order to overcome the deficiencies in the prior art, the present invention provides an automatic fire-extinguishing charging pile with a multi-point explosion-proof module and an automatic fire-extinguishing method thereof, which can suppress the re-ignition of a fire in a cabinet. Technical Solutions

[0005] To achieve the above-mentioned purpose, the automatic fire-extinguishing charging pile of the multi-point explosion-proof module of the present invention comprises a charging pile cabinet, an electrical compartment inside the charging pile cabinet, and aerosol fire extinguishers with automatic triggering function are respectively installed at multiple points in the electrical compartment. The aerosol fire extinguishers can release aerosol flame retardant substances into the electrical compartment; the side of the charging pile cabinet is provided with a grille ventilation window, which has two modes: normal mode and fire extinguishing mode.

[0006] Under normal circumstances, the grille ventilation window connects the electrical compartment with external ventilation; when the grille ventilation window enters the fire extinguishing mode, it can release cooling or flame retardant substances into the electrical compartment and cut off the ventilation state.

[0007] Furthermore, each aerosol fire extinguisher is provided with a temperature sensing module.

[0008] Furthermore, an exhaust fan is provided at the bottom of the electrical compartment.

[0009] Furthermore, the grille ventilation window includes a window frame, in which a number of horizontal strip grille plates are distributed in an array equidistant from top to bottom. Each grille plate is integrally provided with a grille plate rotating shaft along the length extension direction. The two ends of the grille plate rotating shaft are engaged with the bearing holes on the inner side of the window frame through bearing rotation, so that each grille plate can rotate freely around the axis of the corresponding grille plate rotating shaft.

[0010] Furthermore, a ventilation horizontal bar is sandwiched between any two adjacent grille plates; both ends of the ventilation horizontal bar are fixedly connected to the window frame.

[0011] Furthermore, the ventilation cross bar includes a horizontal cylinder, both ends of which are fixedly connected to the window frame; the horizontal cylinder has a number of sunken cylinder wall sections a equidistantly distributed along the axial direction, and each sunken cylinder wall section a is provided with a circle of outer drum-shaped elastic annular wall in an outward bulging state; a closed annular flame-retardant liquid pressure storage tank is formed between the outer drum-shaped elastic annular wall and the sunken cylinder wall section a; each annular flame-retardant liquid pressure storage tank is filled with flame-retardant liquid, so that the outer wall of the ventilation cross bar forms a number of equidistantly distributed outer drum-shaped elastic annular walls along the length direction, and a ventilation gap is formed between any two adjacent outer drum-shaped elastic annular walls on the ventilation cross bar.

[0012] Furthermore, the grille plate is divided into a coplanar grille plate upper lobe and a grille plate lower lobe with the grille plate rotation axis as the boundary; the grille plate surface is an inclined surface, and the grille plate upper lobe of the grille plate is closer to the inner side of the electrical compartment than the grille plate lower lobe;

[0013] From the axial perspective of the grille plate rotation axis, the lower leaf of the grille plate is wider than the upper leaf of the grille plate, so that the lower leaf of the grille plate is heavier than the upper leaf of the grille plate. In the free state, the gravity of the lower leaf of the grille plate overcomes the gravity of the upper leaf of the grille plate, so that the lower leaf of the grille plate has a downward swinging tendency around the axis of the grille plate rotation axis, and the upper leaf of the grille plate has an upward swinging tendency around the axis of the grille plate rotation axis; thereby, the upper surface of the upper leaf of the grille plate is tangent to the outer drum-shaped elastic annular walls on the upper ventilation horizontal bar; the lower surface of the lower leaf of the grille plate is tangent to the outer drum-shaped elastic annular walls on the lower ventilation horizontal bar.

[0014] Furthermore, when the pressure in each annular flame retardant liquid pressure storage bin drops to normal atmospheric pressure, the outer bulging elastic annular walls in the outward bulging state automatically shrink under the action of their own elastic restoring force until the outer bulging elastic annular wall shrinks into a cylindrical elastic annular wall a, so that the outer diameters of the ventilation cross bars tend to be consistent, and the originally existing ventilation gaps disappear; at the same time, driven by gravity, the heavier lower leaves of the grille plate automatically swing downward around the axis of the grille plate rotation shaft, and the lighter upper leaves of the grille plate automatically swing upward around the axis of the grille plate rotation shaft; the lower surface of the lower leaves of the grille plate is tangent to a ventilation cross bar with the same outer diameter at the bottom, and the upper surface of the upper leaves of the grille plate is tangent to a ventilation cross bar with the same outer diameter at the top; thereby making the grille ventilation window relatively closed as a whole, and serving the purpose of blocking external air from entering the electrical compartment;

[0015] Several flame retardant liquid sprayers are fixedly installed on the inner side of the window frame beam, with nozzles pointing towards the electrical compartment;

[0016] A longitudinal liquid guide channel is provided inside the longitudinal beam of the window frame, and a transverse liquid guide channel is provided inside the transverse beam of the window frame. One side of the transverse liquid guide channel is connected to the liquid inlet end of each flame retardant liquid injector through a plurality of liquid inlet channels; the upper end of the longitudinal liquid guide channel is connected to the transverse liquid guide channel;

[0017] The axis of each horizontal cylinder is coaxially provided with a central tube, and the central tube is connected to each annular flame retardant liquid pressure storage bin through a vertically connected connecting tube, and the ends of each central tube are vertically connected to the longitudinal liquid guide channel.

[0018] Furthermore, when a fire occurs, the aerosol fire extinguisher automatically releases a large amount of flame-retardant aerosol into the electrical compartment to extinguish the fire; if the fire re-ignites within a short period of time after this stage, the flame retardant liquid injectors are immediately controlled to spray carbon tetrachloride liquid quickly and evenly into the interior of the electrical compartment through the nozzles. Beneficial effects

[0019] On the basis of aerosol fire extinguishing, the present invention has the following advantages: once the reignition occurs in the electrical compartment, each flame retardant liquid injector sprays carbon tetrachloride liquid quickly and evenly into the electrical compartment through the nozzle, which not only plays the role of isolating the air, but also absorbs heat during the evaporation process, thereby reducing the temperature of the flame area and further accelerating the fire extinguishing process; while each flame retardant liquid injector gradually sprays carbon tetrachloride liquid through the nozzle, the carbon tetrachloride liquid in each annular flame retardant liquid pressure storage bin is gradually discharged and consumed. In the above process, each outer drum-shaped elastic annular wall in the outward bulging state automatically contracts under the action of its own elastic restoring force until the carbon tetrachloride liquid in each annular flame retardant liquid pressure storage bin is completely discharged. The drum-shaped elastic annular wall shrinks into a cylindrical elastic annular wall, so that the outer diameters of the ventilation cross bars tend to be consistent, and the original ventilation gaps disappear; at the same time, driven by gravity, the heavier lower leaves of the grille plate automatically swing down around the axis of the grille plate rotation shaft, and the lighter upper leaves of the grille plate automatically swing up around the axis of the grille plate rotation shaft; the lower surface of the lower leaves of the grille plate is tangent to a ventilation cross bar below with the same outer diameters, and the upper surface of the grille leaf is tangent to a ventilation cross bar above with the same outer diameters; thereby making the grille ventilation window relatively closed as a whole, and preventing external air from entering the electrical compartment; thereby suppressing the escape of carbon tetrachloride flame retardant vapor after gasification in the electrical compartment, and thus suppressing re-ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an overall schematic diagram of this solution;

[0021] Figure 2 is a schematic diagram of the grille ventilation window from a first perspective, which can also be called an outside perspective;

[0022] Figure 3 is a schematic diagram of the grille ventilation window from a second perspective, which can also be called an inner perspective;

[0023] Figure 4 is a cross-sectional view of Figure 2;

[0024] Figure 5 is a view taken along the line a of Figure 4;

[0025] Figure 6 is a perspective view of an enlarged partial view of Figure 5;

[0026] Figure 7 is a dissected view of the ventilation horizontal bar;

[0027] Figure 8 is a schematic diagram of the ventilation bar in two states: normal state and after fire extinguishing state;

[0028] FIG9 is a partial cross-sectional view of the portion marked 22 in FIG8 in two states. Modes for Carrying Out the Invention

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] The automatic fire-extinguishing charging pile with a multi-point explosion-proof module as shown in Figures 1 to 9 includes a charging pile cabinet 2, an electrical compartment 1 inside the charging pile cabinet 2, and aerosol fire extinguishers 6 with automatic triggering function are installed at multiple points in the electrical compartment 1. The aerosol fire extinguisher 6 in this case is an existing device, and the aerosol fire extinguisher 6 can release aerosol flame retardant substances into the electrical compartment 1; each aerosol fire extinguisher 6 is provided with a temperature sensing module; when the temperature sensing module detects that the temperature reaches a threshold value, the aerosol fire extinguisher 6 automatically releases aerosol flame retardant substances, such as FK-5-1-12 in aerosol form, pearlescent alumina, etc.

[0031] In order to prevent the fire from reigniting after the aerosol fire extinguisher 6 is used to extinguish the fire, a grille ventilation window 3 is provided on the side of the charging pile cabinet 2 in this case. The grille ventilation window 3 includes two modes: normal mode and fire extinguishing mode. Under normal conditions, the grille ventilation window 3 connects the electrical compartment 1 with the external ventilation; after the grille ventilation window 3 enters the fire extinguishing mode, it can release cooling or flame retardant substances into the electrical compartment 1 and cut off the ventilation state, thereby preventing the fire from reigniting.

[0032] As shown in Figure 1, an exhaust fan is provided at the bottom of the electrical compartment 1, which can draw out the air in the electrical compartment 1; when the charging pile cabinet 2 is working normally, the exhaust fan provided at the bottom of the electrical compartment 1 is working normally, and the external cold air enters the electrical compartment 1 through the ventilation gap 100 formed between any two adjacent outer drum-shaped elastic annular walls 16 on each ventilation horizontal bar 18 under the action of negative pressure, thereby achieving a normal air-cooling circulation effect. When a fire occurs inside, the exhaust fan will automatically shut down.

[0033] As shown in Figures 2 to 9, the grille ventilation window 3 includes a window frame 7, and a number of horizontal strip grille plates 12 are distributed in an equidistant array from top to bottom in the window frame 7. A grille plate rotating shaft 13 is integrally provided on each grille plate 12 along the length extension direction. The two ends of the grille plate rotating shaft 13 are rotated with the bearing holes on the inner side of the window frame 7 through bearings, so that each grille plate 12 can rotate freely around the axis of the corresponding grille plate rotating shaft 13; a ventilation horizontal bar 18 is sandwiched between any two adjacent grille plates 12; the two ends of the ventilation horizontal bar 18 are fixedly connected to the window frame 7.

[0034] The ventilation cross bar 18 includes a transverse cylinder 14, and both ends of the transverse cylinder 14 are fixedly connected to the window frame 7; the transverse cylinder 14 has a number of sunken cylinder wall sections 14a equidistantly distributed along the axial direction, and each sunken cylinder wall section 14a is provided with a circle of outer drum-shaped elastic annular wall 16 in an outward bulging state. The outer drum-shaped elastic annular wall 16 can be made of elastic silicone material. The properties of silicone are stable and it is insoluble in and does not react with carbon tetrachloride in this case; a closed annular flame retardant liquid pressure storage tank 21 is formed between the outer drum-shaped elastic annular wall 16 and the sunken cylinder wall section 14a; each annular flame retardant liquid pressure storage tank 21 is filled with flame retardant liquid, such as carbon tetrachloride liquid, so that the outer drum-shaped elastic annular wall 16 bulges outward; thereby forming a number of equidistantly distributed outer drum-shaped elastic annular walls 16 on the outer wall of the ventilation cross bar 18 along the length direction, and a ventilation gap 100 is formed between any two adjacent outer drum-shaped elastic annular walls 16 on the ventilation cross bar 18, as shown in Figure 8.

[0035] As shown in Figures 5 and 6, the grille plate 12 is divided into a coplanar grille plate upper lobe 12.1 and a grille plate lower lobe 12.2 with the grille plate rotation axis 13 as the boundary. The grille plate 12 has an inclined surface, and the grille plate upper lobe 12.1 on the grille plate 12 is closer to the inner side of the electrical compartment 1 than the grille plate lower lobe 12.2. From the axial perspective of the grille plate rotation axis 13, the grille plate lower lobe 12.2 is wider than the grille plate upper lobe 12.1, making the grille plate lower lobe 12.2 heavier than the grille plate upper lobe 12.1. In the free state, the gravity of the grille plate lower lobe 12.2 overcomes the gravity of the grille plate upper lobe 12.1, causing the grille plate rotation axis 13 to automatically rotate clockwise. The force causes the lower leaf 12.2 of the grille plate to have a downward swinging tendency around the axis of the grille plate rotation shaft 13, and the upper leaf 12.1 of the grille plate to have an upward swinging tendency around the axis of the grille plate rotation shaft 13; thereby, the upper surface of the grille plate upper leaf 12.1 of the grille plate 12 is tangent to the outer drum-shaped elastic annular walls 16 on the upper ventilation horizontal bar 18; the lower surface of the grille plate lower leaf 12.2 of the grille plate 12 is tangent to the outer drum-shaped elastic annular walls 16 on the lower ventilation horizontal bar 18; the air outside the electric pile cabinet 2 can enter the electrical warehouse 1 through the ventilation gap 100 formed between any two adjacent outer drum-shaped elastic annular walls 16 on each ventilation horizontal bar 18.

[0036] When the pressure in each annular flame retardant liquid pressure storage tank 21 drops to normal atmospheric pressure, the outer bulging elastic annular walls 16 in the outward bulging state automatically shrink under the action of their own elastic restoring force until the outer bulging elastic annular walls 16 shrink into a cylindrical elastic annular wall 16a, so that the outer diameters of the ventilation cross bars 18 tend to be consistent, and the originally existing ventilation gaps 100 disappear; at the same time, driven by gravity, the heavier grille plate lower leaf 12.2 automatically swings downward around the axis of the grille plate rotating shaft 13, and the lighter grille plate upper leaf 12.1 automatically swings upward around the axis of the grille plate rotating shaft 13; so that the lower surface of the grille plate lower leaf 12.2 is tangent to a ventilation cross bar 18 with the same outer diameter at each location below, and the upper surface of the grille plate upper leaf 12.1 is tangent to a ventilation cross bar 18 with the same outer diameter at each location above; thereby making the grille ventilation window 3 relatively closed as a whole and serving the purpose of blocking external air from entering the electrical compartment 1.

[0037] A plurality of nozzles 11 are fixedly mounted on the inner side of the crossbeam of the window frame 7 and are directed toward the flame retardant liquid injector 10 in the electrical compartment 1 ; the specific model of the nozzle 11 may have a certain atomization function.

[0038] As shown in Figure 2, a longitudinal liquid-conducting channel 9.1 is provided inside the longitudinal beam of the window frame 7, and a transverse liquid-conducting channel 9.2 is provided inside the transverse beam of the window frame 7. One side of the transverse liquid-conducting channel 9.2 is connected to the liquid inlet end of each flame-retardant liquid injector 10 through a plurality of liquid inlet channels 9.3; the upper end of the longitudinal liquid-conducting channel 9.1 is connected to the transverse liquid-conducting channel 9.2; a central tube 15 is provided coaxially with the axis of each transverse cylinder 14, and the central tube 15 is connected to each annular flame-retardant liquid pressure storage tank 21 through a vertically connected connecting tube 20, and the end of each central tube 15 is vertically connected to the longitudinal liquid-conducting channel 9.1.

[0039] Working principle: In the factory state, each annular flame retardant liquid pressure storage bin 21 on each ventilation horizontal bar 18 is filled with flame retardant liquid, such as carbon tetrachloride liquid, and the outer drum-shaped elastic annular wall 16 is expanded outward under the liquid pressure in the annular flame retardant liquid pressure storage bin 21; thereby forming a plurality of equally distributed outer drum-shaped elastic annular walls 16 on the outer wall of the ventilation horizontal bar 18 along the length direction, and forming a ventilation gap 100 between any two adjacent outer drum-shaped elastic annular walls 16 on the ventilation horizontal bar 18; when the charging pile cabinet 2 is working normally, the exhaust fan at the bottom of the electrical compartment 1 is operating normally, and the external cold air enters the electrical compartment 1 through the ventilation gap 100 formed between any two adjacent outer drum-shaped elastic annular walls 16 on each ventilation horizontal bar 18 under the action of negative pressure, thereby achieving a normal air-cooling circulation effect;

[0040] When the temperature sensor of any aerosol fire extinguisher 6 in the electrical warehouse 1 senses that overheating and fire have occurred in the electrical warehouse 1, the electrical components and exhaust fans in the electrical warehouse 1 are immediately controlled to cut off the power. At the same time, each aerosol fire extinguisher 6 automatically releases a large amount of flame-retardant aerosol, aerosol-shaped FK-5-1-12, pearlescent alumina, etc. into the electrical warehouse 1. Since the aerosol fire extinguishers 6 are distributed at multiple points in the electrical warehouse 1, the electrical warehouse 1 will be quickly flooded with aerosol flame retardant materials, thereby achieving the purpose of quickly extinguishing the fire in a short time; if at the end of this stage, the flame in the electrical warehouse 1 is completely extinguished and there is no re-ignition in a short time, in order to avoid environmental pollution caused by the release of carbon tetrachloride liquid in the grille ventilation window 3, the grille ventilation window 3 does not need to be switched to the fire extinguishing mode;

[0041] If the open flame in the electrical compartment 1 is quickly extinguished due to the isolation of oxygen by the aerogel mist, the temperature of the combustible materials in the electrical compartment 1 may still be within the ignition point range. After the aerosol in the electrical compartment 1 quickly dissipates through the grille ventilation window 3, there is a possibility that the fire in the electrical compartment 1 will re-ignite.

[0042] Once a re-ignition occurs in the electrical compartment 1, the grille ventilation window 3 is immediately switched to the fire extinguishing mode. The process of switching the grille ventilation window 3 to the fire extinguishing mode is as follows:

[0043] Each flame retardant liquid injector 10 is controlled to spray carbon tetrachloride liquid quickly and evenly into the interior of the electrical compartment 1 through the nozzle 11. When the liquid carbon tetrachloride is sprayed into the fire area, it will evaporate rapidly. Since its vapor density is about 5 times that of air, it will gather around the fire source, forming a thick vapor layer, surrounding the burning material and isolating it from the air. This evaporation dilutes the oxygen concentration, causing the flame to extinguish due to lack of oxygen. At the same time, the carbon tetrachloride absorbs heat during the evaporation process, thereby reducing the temperature of the flame area and further accelerating the fire extinguishing process.

[0044] While each flame retardant liquid injector 10 gradually sprays out carbon tetrachloride liquid through the nozzle 11, the carbon tetrachloride liquid in each annular flame retardant liquid pressure storage tank 21 will gradually pass through the connecting pipe 20, the central tube 15, the longitudinal liquid guide channel 9.1, the transverse liquid guide channel 9.2 and the liquid inlet channel 9.3 to supply each flame retardant liquid injector 10, so that the nozzle 11 can continue to spray carbon tetrachloride liquid to the electrical compartment 1 for a certain period of time; in the process of the carbon tetrachloride liquid in each annular flame retardant liquid pressure storage tank 21 being gradually discharged and completely consumed, the pressure in the annular flame retardant liquid pressure storage tank 21 gradually decreases until it is reduced to normal atmospheric pressure. In the above process, each outer drum-shaped elastic annular wall 16 in an outwardly bulging state automatically contracts under the action of its own elastic restoring force until the carbon tetrachloride liquid in each annular flame retardant liquid pressure storage tank 21 is completely discharged. Afterwards, the outer drum-shaped elastic annular wall 16 shrinks into a cylindrical elastic annular wall 16a, so that the outer diameters of the ventilation cross bars 18 tend to be consistent, and the original ventilation gaps 100 disappear; at the same time, driven by gravity, the heavier grille plate lower leaf 12.2 automatically swings down around the axis of the grille plate rotation shaft 13, and the lighter grille plate upper leaf 12.1 automatically swings up around the axis of the grille plate rotation shaft 13; the lower surface of the grille plate lower leaf 12.2 is tangent to a ventilation cross bar 18 with the same outer diameter at the bottom, and the upper surface of the grille plate upper leaf 12.1 is tangent to a ventilation cross bar 18 with the same outer diameter at the top; thereby making the grille ventilation window 3 relatively closed as a whole, and playing a role in blocking external air from entering the electrical compartment 1; thereby playing a role in suppressing the escape of the carbon tetrachloride flame retardant vapor after gasification in the electrical compartment 1, and thereby playing a role in suppressing re-ignition.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. The automatic fire extinguishing charging pile with multi-point explosion-proof modules is characterized by: The invention comprises a charging pile cabinet (2), wherein an electrical compartment (1) is disposed within the charging pile cabinet (2), and aerosol fire extinguishers (6) with an automatic triggering function are respectively installed at multiple points in the electrical compartment (1), and the aerosol fire extinguishers (6) can release aerosol flame retardant substances into the electrical compartment (1); a grille ventilation window (3) is provided on the side of the charging pile cabinet (2), and the grille ventilation window (3) includes two modes: a normal mode and a fire extinguishing mode. The grille ventilation window (3) connects the electrical compartment (1) with external ventilation under normal conditions; when the grille ventilation window (3) enters a fire extinguishing mode, it can release cooling or flame retardant substances into the electrical compartment (1) and cut off the ventilation state.

2. The automatic fire extinguishing charging pile with multi-point explosion-proof module according to claim 1 is characterized in that: Each of the aerosol fire extinguishers (6) is provided with a temperature sensing module.

3. The automatic fire extinguishing charging pile with multi-point explosion-proof module according to claim 2 is characterized in that: An exhaust fan is provided at the bottom of the electrical compartment (1).

4. The automatic fire extinguishing charging pile with multi-point explosion-proof module according to claim 2 is characterized in that: The grille ventilation window (3) comprises a window frame (7), wherein a plurality of transverse strip grille plates (12) are arranged in an array equidistant from top to bottom in the window frame (7), and each grille plate (12) is integrally provided with a grille plate rotating shaft (13) along a length extension direction, and both ends of the grille plate rotating shaft (13) are rotatably engaged with bearing holes on the inner side of the window frame (7) via bearings, so that each grille plate (12) can rotate freely around the axis of the corresponding grille plate rotating shaft (13).

5. The automatic fire extinguishing charging pile with multi-point explosion-proof module according to claim 4 is characterized in that: A ventilation horizontal bar (18) is sandwiched between any two adjacent grille plates (12); both ends of the ventilation horizontal bar (18) are fixedly connected to the window frame (7).

6. The automatic fire extinguishing charging pile with multi-point explosion-proof modules according to claim 5 is characterized in that: The ventilation cross bar (18) comprises a cross cylinder (14), and both ends of the cross cylinder (14) are fixedly connected to the window frame (7); the cross cylinder (14) has a plurality of equidistantly distributed downwardly-sunk wall sections (14a) along the axial direction, and each downwardly-sunk wall section (14a) is provided with a circle of outwardly-bulged elastic annular wall (16) outside; a closed annular flame-retardant liquid pressure storage bin (21) is formed between the outer drum-shaped elastic annular wall (16) and the downwardly-sunk wall section (14a); each annular flame-retardant liquid pressure storage bin (21) is filled with flame-retardant liquid, so that the outer wall of the ventilation cross bar (18) forms a plurality of equidistantly distributed outer drum-shaped elastic annular walls (16) along the length direction, and a ventilation gap (100) is formed between any two adjacent outer drum-shaped elastic annular walls (16) on the ventilation cross bar (18).

7. The automatic fire extinguishing charging pile with multi-point explosion-proof modules according to claim 6 is characterized in that: The grid plate (12) is divided into a coplanar grid plate upper lobe (12.1) and a grid plate lower lobe (12.2) with the grid plate rotation axis (13) as the boundary; the plate surface of the grid plate (12) is an inclined surface, and the grid plate upper lobe (12.1) on the grid plate (12) is closer to the inner side of the electrical compartment (1) than the grid plate lower lobe (12.2); From the axial perspective of the grille plate rotation axis (13), the grille plate lower leaf (12.2) is wider than the grille plate upper leaf (12.1), so that the grille plate lower leaf (12.2) is heavier than the grille plate upper leaf (12.1); in a free state, the gravity of the grille plate lower leaf (12.2) overcomes the gravity of the grille plate upper leaf (12.1), so that the grille plate lower leaf (12.2) has a downward swinging tendency around the axis of the grille plate rotation axis (13), and the grille plate upper leaf (12.1) has an upward swinging tendency around the axis of the grille plate rotation axis (13); thereby, the upper surface of the grille plate upper leaf (12.1) of the grille plate (12) is tangent to the outer drum-shaped elastic annular walls (16) on an upper ventilation horizontal bar (18); and the lower surface of the grille plate lower leaf (12.2) of the grille plate (12) is tangent to the outer drum-shaped elastic annular walls (16) on a lower ventilation horizontal bar (18).

8. The automatic fire extinguishing charging pile with multi-point explosion-proof modules according to claim 7 is characterized in that: When the pressure in each annular flame retardant liquid pressure storage bin (21) drops to normal atmospheric pressure, each outer bulging elastic annular wall (16) automatically contracts under the action of its own elastic restoring force until the outer bulging elastic annular wall (16) contracts into a cylindrical elastic annular wall (16a), so that the outer diameters of the ventilation cross bar (18) at various locations tend to be consistent, and the originally existing ventilation gaps (100) disappear; at the same time, driven by gravity, the heavier lower leaf (12.2) of the grille plate automatically revolves around the grille. The axis of the plate rotating shaft (13) swings downward, and the relatively light grille plate upper leaf (12.1) automatically swings upward around the axis of the grille plate rotating shaft (13); the lower surface of the grille plate lower leaf (12.2) is tangent to a ventilation horizontal bar (18) with a uniform outer diameter at each location below, and the upper surface of the grille plate upper leaf (12.1) is tangent to a ventilation horizontal bar (18) with a uniform outer diameter at each location above; thereby making the grille ventilation window (3) relatively closed as a whole, and achieving the purpose of preventing external air from entering the electrical compartment (1); A plurality of nozzles (11) are fixedly mounted on the inner side of the crossbeam of the window frame (7) and are directed toward a flame retardant liquid injector (10) in the electrical compartment (1); A longitudinal liquid guiding channel (9.1) is arranged inside the longitudinal beam of the window frame (7), and a transverse liquid guiding channel (9.2) is arranged inside the transverse beam of the window frame (7); one side of the transverse liquid guiding channel (9.2) is connected to the liquid inlet end of each of the flame retardant liquid injectors (10) through a plurality of liquid inlet channels (9.3); the upper end of the longitudinal liquid guiding channel (9.1) is connected to the transverse liquid guiding channel (9.2); A central tube (15) is coaxially arranged on the axis of each of the horizontal cylinders (14); the central tube (15) is connected to each of the annular flame retardant liquid pressure storage bins (21) via a vertically connected connecting tube (20); and the ends of each of the central tubes (15) are vertically connected to the longitudinal liquid guide channel (9.1).

9. The fire extinguishing method of the automatic fire extinguishing charging pile of the multi-point explosion-proof module according to claim 8 is characterized in that: When a fire occurs, the aerosol fire extinguisher (6) automatically releases a large amount of flame retardant aerosol into the electrical compartment (1) to extinguish the fire; if the fire re-ignites within a short period of time after this stage, the flame retardant liquid injectors (10) are immediately controlled to spray carbon tetrachloride liquid quickly and evenly into the interior of the electrical compartment (1) through the nozzles (11).

Images