Intelligent fireproof door control device and method
Through the design of intelligent fire door control devices, the combination of gear system and battery fire blankets is used to solve the problem of fire safety hazards in battery systems in new energy vehicles, and the effect of effectively blocking the spread of fire and cooling is achieved.
Patent Information
- Application Number
- CN202510331641.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2025-06-06
AI Technical Summary
The lithium-ion battery system in new energy vehicles has fire safety risks under specific conditions, resulting in irreversible combustion, which exceeds the response capabilities of conventional fire extinguishing equipment.
An intelligent fire door control device is designed, including the device main body, partition mechanism and reciprocating cooling mechanism. Monitor the fire through the detector, start the drive to drive the gear system, open the battery fire blanket, and drive the nozzle to spray water through the rotor to cool down.
Effectively block the spread of fire, extend rescue time, reduce losses caused by fire, and minimize fire spread.
Smart Images

Figure CN120094124A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of new energy vehicles, and in particular to an intelligent fire door control device and method. Background Art
[0002] New energy vehicles refer to vehicles that use new power systems and are completely or mainly driven by clean fuels such as electricity and hydrogen. They aim to reduce dependence on traditional fossil fuels and reduce exhaust emissions. New energy vehicles are in a period of dual acceleration of technology iteration and market expansion. With the maturity of the industrial chain and the improvement of infrastructure, their penetration rate is expected to continue to rise, promoting the transformation of the transportation sector to a low-carbon one.
[0003] However, due to its high energy density, the lithium-ion battery system carried by new energy vehicles has significant fire safety hazards under certain conditions. Lithium-ion batteries use lithium compounds as active substances and are prone to thermal runaway under overcharging, short circuit, mechanical damage or high temperature environments. The thermal runaway of a single battery cell will cause the temperature of adjacent batteries to rise sharply (the temperature can reach hundreds of degrees Celsius), forming a "heat spread" effect. If there is no effective isolation design between battery modules, the local fire source will quickly spread to the entire battery pack, resulting in irreversible combustion. Garages are typical closed scenes with poor air flow. The high-temperature flue gas (containing toxic gases such as hydrogen fluoride and carbon monoxide) produced by combustion is difficult to spread, forming a high-temperature and high-pressure environment. The oxygen free radicals and combustible electrolyte vapors (such as carbonate solvents) released by battery combustion further intensify the fire. The flame temperature can reach more than 800°C, far exceeding the response capacity of conventional fire extinguishing equipment. At the same time, when vehicles are densely parked in the garage, the thermal radiation conduction of adjacent vehicles (mainly through metal parts of the body and the ground) becomes the key path for the spread of fire. Experiments show that when the distance between two vehicles is less than 1 meter, the thermal radiation intensity exceeds 10kW / m 2 The critical threshold is enough to ignite the insulation layer or high-voltage wiring harness of the adjacent battery pack. In addition, charging facilities for multiple vehicles connected in parallel may generate arcs due to circuit short circuits in a fire, further triggering chain combustion. Summary of the invention
[0004] In view of the existing problems, the present invention provides an intelligent fire door control device and method, which can effectively solve the problems raised in the background technology.
[0005] To solve the above problems, the present invention adopts the following technical solutions:
[0006] An intelligent fire door control device and method, comprising: a device body;
[0007] A partition mechanism, the partition mechanism is arranged inside the device body, the partition mechanism comprises a chassis, the inside of the chassis is connected with a driving member, the upper end of the driving member is transmission-connected with a first gear, one end of the first gear is transmission-connected with a first transverse tooth, and the other end of the first gear is transmission-connected with a second transverse tooth;
[0008] The reciprocating cooling mechanism comprises a rotating rod, the lower end of the rotating rod is transmission-connected with a second gear, and the outer side of the second gear is transmission-connected with a rack.
[0009] As a further solution of the present invention: one end of the first transverse tooth is connected to a first connecting rod, and one end of the second transverse tooth is connected to a second connecting rod.
[0010] As a further solution of the present invention: the outer surface of the first gear meshes with the first transverse teeth, and the outer surface of the first gear meshes with the second transverse teeth.
[0011] As a further solution of the present invention: a magnetic piece is installed at the lower end of the first connecting rod, a magnet is arranged at the lower end of the magnetic piece, a battery fire blanket is connected to the lower end of the magnet, and a blanket pressure stone is connected to the lower end of the battery fire blanket.
[0012] As a further solution of the present invention: four groups of magnetic parts are installed, and the lower ends of the magnetic parts are in contact with the upper ends of the magnets.
[0013] As a further solution of the present invention: the inner part of the rack is transmission-connected with a third gear, and the lower end of the rack is transmission-connected with a bracket.
[0014] As a further solution of the present invention: the outer surface of the second gear fits with the inner wall of the rack, and the inner wall of the rack fits with the outer surface of the third gear.
[0015] As a further solution of the present invention: a nozzle is installed at the bottom of the bracket, and a water pipe is connected to the upper end of the nozzle.
[0016] As a further solution of the present invention: fire walls are installed at both ends of the device body, and a detector is installed at the bottom of the device body.
[0017] As a further solution of the present invention:
[0018] Step 1: Install the device body above the parking space, and monitor through the detector at the bottom of the device body. When fire smoke is sensed, the fire wall extends downward to block and control the burning tram;
[0019] Step 2, after descending through the fire wall, the device body is remotely monitored, and the driving member is started to drive the first gear to rotate, and the first gear drives the first gear and the second transverse gear to open horizontally;
[0020] Step 3, the first connecting rod is connected through the first transverse tooth and the second transverse tooth, so that the battery fire blanket at the bottom of the magnet connected to the bottom magnetic piece is unfolded, and when the internal temperature reaches the Curie temperature, the magnetic piece and the magnet are demagnetized and separated;
[0021] Step 4: The battery fire blanket falls down and covers the outside of the burning new energy vehicle through the blanket pressure stone at the bottom of the battery fire blanket and the gravity of the magnet itself;
[0022] Step 5: The second gear is driven to rotate by driving the rotary rod through the other end of the driving member, and the second gear cooperates with the third gear to drive the rack transmission activity;
[0023] Step 6: Connect the bracket to the rack so that the nozzle at the bottom of the bracket can transport water through the water pipe to cool the new energy vehicle at the bottom.
[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: by installing a detector at the lower end of the device body, when a fire occurs in a new energy vehicle in the garage, the monitoring of the detector can make the fire wall drop quickly to shield the vehicles; by installing a partition mechanism inside the device body, when the detector detects the fire disaster of the vehicle at the bottom, by starting the driving member inside the device body, the first gear is rotated to drive the battery fire blanket at the bottom to open; when the temperature inside the device body reaches the Curie temperature, the magnetic member and the magnet are connected, so that the battery fire blanket falls and is shot onto the outside of the fire vehicle through the weight of the magnet and the blanket pressure stone at the bottom, shielding the burning new energy vehicle; the second gear is driven to rotate by the rotating rod at the bottom of the driving member, the nozzle is fixed by the bracket, and the water source is connected with the water pipe, and the new energy vehicle covered with the battery fire blanket is sprayed back and forth to produce a cooling effect, thereby extending the rescue time and waiting for the arrival of firefighters, thereby achieving the effect of intelligent fire prevention to control the spread of fire. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of an intelligent fire door control device and method;
[0026] Figure 2 A schematic diagram of the cross-sectional structure of a fire control component of an intelligent fire door control device and method;
[0027] Figure 3 It is a schematic diagram of the structure of the cooling component in the intelligent fire door control device and method;
[0028] Figure 4 Intelligent fire door control device and method Figure 2 A schematic diagram of the structure enlargement at the center A;
[0029] Figure 5It is a schematic diagram of the structure of the reciprocating component in the intelligent fire door control device and method;
[0030] Figure 6 It is a schematic diagram of the structure of the opening and closing components in the intelligent fire door control device and method;
[0031] Figure 7 This is a schematic diagram of the top view structure of the reciprocating component in the intelligent fire door control device and method.
[0032] In the figure: 1. device body; 12. fire wall 12; 13. detector; 2. partition mechanism; 21. chassis; 22. driving member; 23. first gear; 24. first transverse tooth; 25. second transverse tooth; 26. first connecting rod; 206. second connecting rod; 27. magnetic member; 28. magnet; 29. battery fire blanket; 209. blanket pressing stone; 3. reciprocating cooling mechanism; 31. rotary rod; 32. second gear; 33. rack; 34. third gear; 35. bracket; 36. sprinkler; 37. water pipe. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0034] Combination Figures 1 to 7 The present embodiment is described. The present embodiment provides an intelligent fire door control device and method, including: a device body 1; fire walls 12 are installed at both ends of the device body 1, and a detector 13 is installed at the bottom of the device body 1; by installing the detector 13 at the lower end of the device body 1, when a fire occurs in a new energy vehicle in the garage, the monitoring of the detector 13 can make the fire wall 12 drop quickly, and the bottom of the fire wall 12 fits with the ground to shield the vehicles. In the design of the new energy vehicle garage safety protection system, an active fire isolation system is constructed by integrating an intelligent composite fire detector 13 at the lower end of the device body 1. The detector 13 adopts multi-parameter sensing technology, and can simultaneously monitor multiple fire characteristic parameters such as flame radiation, abnormal temperature rise accuracy of ±0.5°C, combustible gas concentration methane / hydrogen detection limit ≤5ppm and smoke particle size recognition range of 0.3-10μm. Multi-dimensional data fusion analysis is performed through the built-in AI algorithm to effectively avoid the problem of false alarms from a single sensor.
[0035] When the detector 13 senses a fire hazard, its signal transmission module immediately sends the warning information to the central control unit with a response time of ≤200ms. After confirming the fire, the control unit automatically triggers the electromagnetic locking mechanism of the firewall 12. The firewall 12 adopts a double-layer structure design: the outer layer is A1-grade non-combustible inorganic board with a fire resistance limit of ≥3 hours, the inner layer is filled with nano-aerogel insulation material with a thermal conductivity of <0.02W / m·K, and the surface is coated with a high-temperature resistant ceramic coating that can withstand a high temperature of 1200°C. The drive system adopts a redundant design, and the main drive is an explosion-proof servo motor with a thrust of ≥10kN. The backup hydraulic device ensures that 3 complete opening and closing actions can be completed in the event of a power outage.
[0036] During the descent of the fire wall 12, the guide shoe device at the bottom thereof is precisely matched with the embedded track on the ground at the millimeter level. The end face sealing strip is made of heat-expandable graphite material to ensure that the smoke leakage of the gap formed by the airtight isolation barrier after closing is less than 0.01%. The control system has three preset working modes: the single-zone isolation mode is used for local fire control, the linkage mode can synchronously start the isolation walls of adjacent partitions to form a fire protection unit, and the emergency mode allows firefighters to temporarily unlock the lock through the authorized terminal.
[0037] The system is designed specifically for the thermal runaway characteristics of power batteries in new energy vehicles. A lithium battery thermal runaway feature database is embedded in the detector 13 algorithm, which can predict fire risks 3-5 minutes in advance. An infrared reflection layer is added to the surface of the fire wall 12, which can effectively block the thermal radiation conduction reflectivity of >85% in the high temperature environment of the fire scene. The system is equipped with a visual monitoring platform, which can display the isolation status of each partition in real time, and form a linkage response mechanism with the garage smoke exhaust system and automatic sprinkler device;
[0038] The partition mechanism 2 is arranged inside the device body 1, and includes a chassis 21, and a driving member 22 is connected inside the chassis 21, and the upper end of the driving member 22 is drivingly connected to a first gear 23, one end of the first gear 23 is drivingly connected to a first transverse tooth 24, and the other end of the first gear 23 is drivingly connected to a second transverse tooth 25;
[0039] The reciprocating cooling mechanism 3 comprises a rotary rod 31 , a lower end of the rotary rod 31 is transmission-connected to a second gear 32 , and an outer side of the second gear 32 is transmission-connected to a rack 33 .
[0040] See also Figure 3 , Figure 4 and Figure 6As shown, one end of the first transverse tooth 24 is connected to the first connecting rod 26, one end of the second transverse tooth 25 is connected to the second connecting rod 206, the outer surface of the first gear 23 is meshed with the first transverse tooth 24, and the outer surface of the first gear 23 is meshed with the second transverse tooth 25; a magnetic piece 27 is installed at the lower end of the first connecting rod 26, a magnet 28 is arranged at the lower end of the magnetic piece 27, a battery fire blanket 29 is connected to the lower end of the magnet 28, and a blanket pressure stone 209 is connected to the lower end of the battery fire blanket 29. Four groups of magnetic pieces 27 are installed, and the lower end of the magnetic piece 27 is in contact with the upper end of the magnet 28. A partition mechanism 2 is cleverly installed inside the device body 1. This mechanism is designed to respond to specific emergency situations. When the detector 13 installed at the bottom of the device keenly detects a fire in the vehicle at the bottom, it will quickly transmit a signal to trigger the start of the driving member 22 inside the device body 1. Once the driving member 22 is started, it drives the first gear 23 to start rotating. This first gear 23 not only operates itself, but also drives the first transverse tooth 24 and the second transverse tooth 25 to slowly open in the lateral direction through the action of its gear meshing. As the first transverse tooth 24 and the second transverse tooth 25 are opened, the battery fire blanket 29 connected to their bottoms is also gradually opened, ready to enter the fire extinguishing state. It is worth noting that one end of the first transverse tooth 24 and the second transverse tooth 25 is also connected to the first connecting rod 26. The bottom of this connecting rod is designed with a magnetic piece 27. The magnetic piece 27 and the magnet 28 are mutually attracted by magnetism, and the magnet 28 is closely connected to the battery fire blanket 29. This clever design allows the battery fire blanket 29 to remain stably suspended under normal conditions. However, when the temperature inside the device body 1 is gradually shrouded by the fire, the battery fire blanket 29 is gradually shrouded by magnetism. When the temperature rises to the Curie temperature of the magnetic element 27, the magnetism of the magnetic element 27 disappears. This change causes the magnetic attraction between the magnetic element 27 and the magnet 28 to cease to exist. At this time, the battery fire blanket 29 is no longer bound by magnetism, but falls rapidly under the gravity of the blanket pressing stone 209 at the bottom and is projected onto the outside of the fire vehicle. In this way, the battery fire blanket 29 can cover the fire vehicle in a timely and accurate manner, effectively isolating the air and extinguishing the flames, thus gaining precious time for rescue work and minimizing the losses caused by the fire.
[0041] See also Figure 3 and Figure 5As shown, the internal transmission of the rack 33 is connected to the third gear 34, and the lower end of the rack 33 is transmission-connected to the bracket 35. The outer surface of the second gear 32 fits with the inner wall of the rack 33, and the inner wall of the rack 33 fits with the outer surface of the third gear 34. A nozzle 36 is installed at the bottom of the bracket 35, and the upper end of the nozzle 36 is connected to a water pipe 37. In the design of the device body 1, the driving member 22 is carefully set as a double-headed motor. This design provides it with strong driving force and flexibility. When the fire extinguishing procedure needs to be started, the driving member 22 starts to operate, and the rotating rod 31 at the bottom thereof rotates accordingly. The rotation of the rotating rod 31 is not isolated. It transmits the rotational power to the second gear 32 by meshing with the second gear 32, causing it to start rotating. The rotation of the second gear 32 further drives the meshing rack 33 therewith to perform linear motion. In this process, the third gear 34 plays a key supporting and transmission role, which ensures that the rack 33 can move smoothly and accurately. Next is a bracket 35, which not only firmly supports the rack 33, but also undertakes the important task of fixing the nozzle 36. The nozzle 36 is carefully installed on the bracket 35 to ensure that its position is accurate and the spraying direction is controllable. In order to achieve cooling treatment for the new energy vehicle covered with the battery fire blanket 29, the nozzle 36 is connected to the water source through the water pipe 37. When the rack 33 drives the bracket 35 and the nozzle 36 to move to the appropriate position, the water source is transported to the nozzle 36 through the water pipe 37, and the nozzle 36 immediately starts to spray water. The water flows back and forth at the upper end of the fire source vehicle through the rack 33. This water flow can not only effectively cool down the new energy vehicle covered with the battery fire blanket 29, but also further suppress the spread of the fire, and buy more precious time for rescue work. Under such a design, even in the face of a sudden fire in a new energy vehicle, it can respond quickly, effectively control the fire, and wait for the arrival of firefighters, laying a solid foundation for subsequent rescue and firefighting work.
[0042] As a further solution of the present invention: Step 1, the device body 1 is installed above the parking space, and the detector 13 at the bottom of the device body 1 is used for monitoring. When fire smoke is sensed, the fire wall 12 extends downward to block and control the burning tram;
[0043] Step 2, after descending through the firewall 12, remote monitoring is performed through the device body 1, and the driving member 22 is started to drive the first gear 23 to rotate, and the first gear 23 drives the first gear 23 and the second transverse tooth 25 to open horizontally;
[0044] Step 3, the first connecting rod 26 is connected through the first transverse tooth 24 and the second transverse tooth 25, so that the battery fire blanket 29 at the bottom of the magnet 28 connected to the bottom magnetic piece 27 is unfolded, and when the internal temperature reaches the Curie temperature, the magnetic piece 27 and the magnet 28 are demagnetized and separated. The magnet 28 is set to be a neodymium iron boron magnet material, and its Curie temperature is relatively low;
[0045] Step 4: The battery fire blanket 29 falls down and covers the outside of the burning new energy vehicle through the blanket pressing stone 209 at the bottom of the battery fire blanket 29 and the gravity of the magnet 28. The device body 1 is monitored by the fire wall 12. A gravity sensor is set inside the device body 1. When the battery fire blanket 29 falls, the driving part 22 is started.
[0046] Step 5, the driving member 22 is configured as a double-headed motor, so the other end of the driving member 22 can drive the rotary rod 31 to drive the second gear 32 to rotate, and the second gear 32 cooperates with the third gear 34 to drive the rack 33 to transmit the activity.
[0047] Step 6: Connect the bracket 35 to the rack 33, so that the nozzle 36 at the bottom of the bracket 35 can transport water through the water pipe 37 to cool down the new energy vehicle at the bottom, complete the work of controlling the fire source, and wait for fire rescue.
[0048] The working principle of the present invention is as follows: by installing a detector 13 at the lower end of the device body 1, when a fire occurs in a new energy vehicle in the garage, the monitoring of the detector 13 can make the fire wall 12 drop quickly to block the vehicles, and by installing a partition mechanism 2 inside the device body 1, when the detector 13 detects the fire disaster of the vehicle at the bottom, by starting the driving member 22 inside the device body 1, the first gear 23 is rotated, and the first gear 23 drives the first transverse tooth 24 and the second transverse tooth 25 to open horizontally, driving the battery fire blanket 29 at the bottom thereof to open, and at the same time, the bottom of the first connecting rod 26 connected to one end of the first transverse tooth 24 and the second transverse tooth 25 is connected to the battery fire blanket 29 by magnetic adsorption through the magnetic member 27 and the magnet 28. When the temperature inside the main body 1 reaches the Curie temperature, the magnetic part 27 and the magnet 28 are connected, so that the battery fire blanket 29 is dropped and shot onto the outside of the fire vehicle by the weight of the magnet 28 and the blanket pressure stone 209 at the bottom thereof, so as to shield the burning new energy vehicle. At the same time, the driving part 22 is configured as a double-headed motor, and the second gear 32 is driven to rotate by the rotary rod 31 at the bottom of the driving part 22, so that the second gear 32 drives the rack 33, and the transmission is supported by the third gear 34. At the same time, the bottom of the rack 33 is connected to the bracket 35, and the nozzle 36 is fixed by the bracket 35, and the water source is connected with the water pipe 37 to spray the new energy vehicle covered with the battery fire blanket 29 to produce a cooling effect, thereby extending the rescue time and waiting for the arrival of the firefighters.
[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.
[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. Intelligent fire door control device, characterized by: include: Device body (1); A partition mechanism (2), the partition mechanism (2) being arranged inside the device body (1), the partition mechanism (2) comprising a chassis (21), the chassis (21) being internally connected with a driving member (22), the upper end of the driving member (22) being transmission-connected with a first gear (23), one end of the first gear (23) being transmission-connected with a first transverse tooth (24), and the other end of the first gear (23) being transmission-connected with a second transverse tooth (25); A reciprocating cooling mechanism (3), the reciprocating cooling mechanism (3) comprising a rotating rod (31), the lower end of the rotating rod (31) being transmission-connected to a second gear (32), and the outer side of the second gear (32) being transmission-connected to a rack (33).
2. The intelligent fire door control device according to claim 1, characterized in that: One end of the first transverse tooth (24) is connected to a first connecting rod (26), and one end of the second transverse tooth (25) is connected to a second connecting rod (206).
3. The intelligent fire door control device according to claim 2, characterized in that: The outer surface of the first gear (23) is meshed with the first transverse teeth (24), and the outer surface of the first gear (23) is meshed with the second transverse teeth (25).
4. The intelligent fire door control device according to claim 3, characterized in that: A magnetic piece (27) is installed at the lower end of the first connecting rod (26), a magnet (28) is arranged at the lower end of the magnetic piece (27), a battery fire blanket (29) is connected to the lower end of the magnet (28), and a blanket pressure stone (209) is connected to the lower end of the battery fire blanket (29).
5. The intelligent fire door control device according to claim 4, characterized in that: Four groups of magnetic parts (27) are installed, and the lower end of the magnetic part (27) is in contact with the upper end of the magnet (28).
6. The intelligent fire door control device according to claim 5, characterized in that: The interior of the rack (33) is transmission-connected to a third gear (34), and the lower end of the rack (33) is transmission-connected to a bracket (35).
7. The intelligent fire door control device according to claim 6, characterized in that: The outer surface of the second gear (32) fits with the inner wall of the rack (33), and the inner wall of the rack (33) fits with the outer surface of the third gear (34).
8. The intelligent fire door control device according to claim 7, characterized in that: A spray head (36) is installed at the bottom of the bracket (35), and a water connecting pipe (37) is connected to the upper end of the spray head (36).
9. The intelligent fire door control device according to claim 8, characterized in that: Fire walls 12 are installed at both ends of the device body (1), and a detector (13) is installed at the bottom of the device body (1).
10. The control method of the intelligent fire door control device according to any one of claims 1 to 9, characterized in that: The steps are as follows: Step 1: Install the device body (1) above the parking space, monitor through the detector (13) at the bottom of the device body (1), and when fire smoke is sensed, the fire wall (12) extends downward to block and control the burning tram; Step 2, after descending through the fire wall (12), remote monitoring is performed through the device body (1), and the driving member (22) is started to drive the first gear (23) to rotate, and the first gear (23) drives the first gear (23) and the second transverse tooth (25) to open horizontally; Step 3, the first connecting rod (26) is connected through the first transverse tooth (24) and the second transverse tooth (25), so that the battery fire blanket (29) at the bottom of the magnet (28) connected to the bottom magnetic piece (27) is unfolded, and when the internal temperature reaches the Curie temperature, the magnetic piece (27) and the magnet (28) are demagnetized and separated; Step 4: The battery fire blanket (29) is made to fall and cover the outside of the burning new energy vehicle by the blanket pressing stone (209) at the bottom of the battery fire blanket (29) and the gravity of the magnet (28); Step 5: The other end of the driving member (22) drives the rotating rod (31) to drive the second gear (32) to rotate, and the second gear (32) cooperates with the third gear (34) to drive the rack (33) to transmit the movement; Step 6: Connect the bracket (35) to the rack (33), so that the nozzle (36) at the bottom of the bracket (35) can transport water through the water pipe (37) to cool the new energy vehicle at the bottom.