Fireproof device, power module and LED display screen

Abstract

The application belongs to the technical field of LED display screens, and particularly relates to a fireproof device, a power module and an LED display screen, which comprise a fire extinguishing liquid pipe, a fixed fire extinguishing pipe rubber sleeve, a wiring seat, an incoming wire end and an outgoing wire end. The outer surface of the fire extinguishing liquid pipe is coated with a conductive coating, and the fire extinguishing liquid pipe is placed on the fixed fire extinguishing pipe rubber sleeve. A metal conductive sheet is arranged on the fixed fire extinguishing pipe rubber sleeve, and the metal conductive sheet is electrically connected with the incoming wire end and the outgoing wire end respectively. When the fire extinguishing liquid pipe is placed on the fixed fire extinguishing pipe rubber sleeve, the conductive coating is in contact with the metal conductive sheet, and a conduction circuit is formed. The fire extinguishing liquid pipe is made of a fusible material with a preset melting point. When the ambient temperature reaches the preset melting point, the fire extinguishing liquid pipe is broken, the conduction circuit is cut off, and the fire extinguishing liquid encapsulated in the fire extinguishing liquid pipe is instantaneously gasified into inert gas to cover a protection area and achieve fire extinguishing. The melting of the fire extinguishing liquid pipe triggers the cutting off of the circuit and the integration of the fire extinguishing function in the same device, and the device can respond quickly.

Description

Technical Field

[0001] This invention belongs to the field of LED display technology, specifically relating to a fireproof device, a power supply module, and an LED display. Background Technology

[0002] With the rapid iteration of LED display technology and the continuous expansion of application scenarios, LED displays, with their advantages of high brightness, wide color gamut, and low energy consumption, have been widely penetrated into many fields such as commercial advertising, outdoor media, stage performances, and smart city construction. As screen sizes increase and resolutions become higher, the overall power consumption of LED displays has significantly increased. Therefore, the operational stability and safety protection capabilities of the LED display power supply, as the core power supply unit of the screen, are extremely important.

[0003] In the current technological system, LED display power supplies generally only have basic power conversion and load supply functions, lacking active protection mechanisms against overheating and spontaneous combustion. When an LED display screen operates under high load for an extended period, the power supply is prone to continuous overheating due to excessive load. If the heat cannot be dissipated in time, it can easily cause short circuits and spontaneous combustion of internal components, which in turn can ignite surrounding screen components, leading to a fire. Such accidents not only render the entire LED display screen unusable, resulting in property losses of hundreds of thousands of yuan or even higher, but also pose a serious threat to the personal safety of personnel on site.

[0004] Currently, the LED display industry mainly relies on conventional methods such as passive cooling or overcurrent and overvoltage protection to address power supply overheating issues. However, passive cooling can only slow down the rate of heat accumulation and cannot fundamentally eliminate the risk of overheating and spontaneous combustion; overcurrent and overvoltage protection can only cut off the power supply when circuit parameters are abnormal and cannot intervene in cases where a fire has already occurred.

[0005] Therefore, finding a suitable fire protection device is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, in order to solve the problems mentioned in the prior art, this application provides a fireproof device, a power supply module and an LED display screen.

[0007] In a first aspect, this application provides a fire protection device, including a fire extinguishing liquid pipe, a fixing sleeve for the fire extinguishing pipe, a terminal block, an inlet terminal, and an outlet terminal; The outer surface of the fire extinguishing liquid pipe is coated with a conductive coating, and the fire extinguishing liquid pipe is placed on the fixed fire extinguishing pipe sleeve. The fixed fire extinguishing pipe sleeve is provided with a metal conductive sheet, which is electrically connected to the inlet end and the outlet end respectively. When the fire extinguishing liquid tube is placed on the fixed fire extinguishing tube sleeve, the conductive coating comes into contact with the metal conductive sheet to form a conductive circuit. The fire extinguishing liquid tube is made of a fusible material with a preset melting point. When the ambient temperature reaches the preset melting point, the fire extinguishing liquid tube ruptures, cutting off the conductive circuit. The fire extinguishing liquid encapsulated inside the fire extinguishing liquid tube instantly vaporizes into an inert gas to cover the protected area and extinguish the fire.

[0008] Furthermore, the fusible material is polyethylene, polypropylene, or polyvinyl chloride.

[0009] Furthermore, the extinguishing liquid is heptafluoropropane, hexafluoropropane, or perfluorohexanone. After the extinguishing liquid is vaporized into an inert gas, it can reduce the oxygen concentration in the protected area and inhibit the combustion reaction.

[0010] Furthermore, the fixed fire extinguishing pipe sleeve has an arc-shaped groove that matches the shape of the fire extinguishing liquid pipe, and the fire extinguishing liquid pipe is embedded in the arc-shaped groove.

[0011] Furthermore, the inner wall of the arc-shaped groove is coated with a high-temperature resistant insulating coating with a thickness of 0.1-0.3 mm.

[0012] Furthermore, the incoming line of the fire protection device is electrically connected to the incoming line of the power supply; The power input terminal of the fireproof device is electrically connected to the power input terminal of the LED display light-emitting module; The incoming line of the fireproof device is electrically connected to the incoming line of the PCB lamp board.

[0013] Secondly, this application provides a power module, including a fireproof device as described in any one of the first aspects, wherein the power module further includes a power body and a power protection cover; The power supply body has a power output terminal, the inlet terminal of the fireproof device is electrically connected to the power output terminal, and the outlet terminal of the fireproof device is used to connect to an external load. The power protection cover is fitted onto the power body, forming a closed enclosure together with the power body. The fireproof device is fixedly installed in the closed enclosure near the heat-generating area of ​​the power body. When the ambient temperature of the power module reaches the preset melting point of the fire extinguishing liquid tube in the fire protection device, the fire extinguishing liquid tube ruptures, cutting off the conductive circuit between the power supply body and the external load. The fire extinguishing liquid encapsulated in the fire extinguishing liquid tube instantly vaporizes into an inert gas, covering the power supply body to extinguish the fire.

[0014] Furthermore, the power supply protective cover is provided with an aerogel insulation layer with a thickness of 2-5mm on the inner side facing the power supply body; The power module also includes a temperature warning module, which is electrically connected to the metal conductive sheet of the fire protection device. When the ambient temperature reaches 80% of the preset melting point of the fire extinguishing liquid pipe, the temperature warning module sends a wireless warning signal to an external monitoring terminal.

[0015] Thirdly, this application provides an LED display screen, including the fireproof device described in any one of the first aspects, wherein the LED display screen includes a plurality of LED display modules, and the plurality of LED display modules are spliced ​​together to form an LED display screen; The LED display module is equipped with a fireproof device, and the input terminal of the fireproof device is connected to the 220V input circuit of the LED display module. When the ambient temperature of the LED display module reaches the preset melting point of the fire extinguishing liquid tube, the fire extinguishing liquid tube automatically ruptures, cutting off the circuit.

[0016] Furthermore, a power supply module equipped with a fire-resistant device is installed on the LED display module; The LED display module is mounted on the housing so that a sealed space is formed between the LED display module and the housing. When the ambient temperature of the LED display module or power module reaches the preset melting point of the fire extinguishing liquid tube, the fire extinguishing liquid tube will automatically rupture.

[0017] According to the fire protection device, power module, and LED display screen provided in this application, the beneficial effects are as follows: the circuit cut-off and fire extinguishing functions are integrated into the same device through the melting trigger of the fire extinguishing liquid pipe, enabling rapid response; when the temperature of the protected area reaches the preset melting point, the contact between the metal conductive sheet and the conductive coating on the outside of the fire extinguishing liquid pipe is broken, instantly cutting off the 220V incoming circuit and blocking the fire source from the root; the environmentally friendly fire extinguishing liquid encapsulated inside the fire extinguishing liquid pipe instantly vaporizes into an inert gas, which quickly and evenly covers the protected area in the sealed cavity space, causing the oxygen concentration to drop instantly, resulting in rapid power cut-off and fire extinguishing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Attached image description: Figure 1 This is a schematic diagram of the fire protection device in one embodiment; Figure 2 This is a schematic diagram of the fire protection device and power module in one embodiment; Figure 3This is a schematic diagram of the fire protection device and LED display module in one embodiment; Figure 4 This is a schematic diagram of the structure of an LED display screen in one embodiment.

[0020] Figure label: 10. Fire extinguishing liquid pipe; 11. Conductive coating; 20. Fire extinguishing pipe fixing sleeve; 21. Metal conductive sheet; 30. Terminal block; 40. Power supply body; 50. Power supply protection cover; 60. LED display module; 70. Cabinet; 80. PCB board. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Example 1 In existing technologies, LED display power supplies generally only possess basic power conversion and load supply functions, lacking active protection mechanisms against overheating and spontaneous combustion. When an LED display screen operates under high load for extended periods, the power supply is prone to continuous overheating due to excessive load. If the heat cannot be dissipated in time, it can easily cause short circuits and spontaneous combustion of internal components, which in turn can ignite surrounding screen components, leading to a fire. Such accidents not only render the entire LED display screen unusable, resulting in property losses of hundreds of thousands of yuan or even higher, but also pose a serious threat to the personal safety of personnel on site. Currently, the LED display industry mainly relies on passive cooling or conventional methods such as overcurrent and overvoltage protection to address power supply overheating issues. However, passive cooling can only slow down the rate of heat accumulation and cannot fundamentally eliminate the risk of overheating and spontaneous combustion; overcurrent and overvoltage protection can only cut off the power supply when circuit parameters are abnormal and cannot intervene in cases where a fire has already occurred.

[0023] See Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a fire protection device includes a fire extinguishing liquid pipe 10, a fire extinguishing pipe fixing sleeve 20, a terminal block 30, an inlet terminal, and an outlet terminal; The outer surface of the fire extinguishing liquid pipe 10 is coated with a conductive coating 11, and the fire extinguishing liquid pipe 10 is placed on the fixed fire extinguishing pipe sleeve 20. The fixed fire extinguishing pipe sleeve 20 is provided with a metal conductive sheet 21, which is electrically connected to the inlet end and the outlet end respectively. When the fire extinguishing liquid pipe 10 is placed on the fixed fire extinguishing pipe sleeve 20, the conductive coating 11 comes into contact with the metal conductive sheet 21 to form a conductive circuit. The fire extinguishing liquid tube 10 is made of a fusible material with a preset melting point. When the ambient temperature reaches the preset melting point, the fire extinguishing liquid tube 10 ruptures, cutting off the conductive circuit. The fire extinguishing liquid encapsulated in the fire extinguishing liquid tube 10 instantly vaporizes into an inert gas to cover the protected area and extinguish the fire.

[0024] It should be noted that the outer surface of the fire extinguishing liquid tube 10 is coated with a conductive coating 11. When placed on the fire extinguishing tube sleeve 20, the metal conductive piece 21 inside the fire extinguishing tube sleeve 20 is in close contact with the conductive coating 11, forming a complete conductive circuit without affecting the normal power supply of the equipment. The terminal block 30 is installed on the PCB board 80. When the temperature of the protected area reaches the preset melting point of the fire extinguishing liquid tube 10, the fire extinguishing liquid tube 10 melts and ruptures, breaking the physical contact between the metal conductive piece 21 and the conductive coating 11, instantly cutting off the circuit between the inlet and outlet terminals, and blocking the energy supply of the fire source; the fire extinguishing liquid encapsulated inside the fire extinguishing liquid tube 10 is instantly vaporized into an inert gas, which rapidly diffuses within the protected area, reducing the oxygen concentration to below the combustion threshold, thus achieving suffocation fire extinguishing.

[0025] According to the fire prevention device provided in this embodiment, the circuit cutting and fire extinguishing functions are integrated into the same device by the melting trigger of the fire extinguishing liquid pipe 10, which provides a rapid response. When the temperature of the protected area reaches the preset melting point, the contact between the metal conductive sheet 21 and the outer conductive coating 11 of the fire extinguishing liquid pipe 10 is broken, instantly cutting off the 220V incoming circuit and blocking the fire source from the root. The environmentally friendly fire extinguishing liquid encapsulated in the fire extinguishing liquid pipe 10 instantly vaporizes into an inert gas, which quickly and evenly covers the protected area in the sealed cavity space, causing the oxygen concentration to drop instantly, quickly cutting off the power and extinguishing the fire, and reducing losses.

[0026] Example 2 Based on Embodiment 1, this embodiment provides further technical solutions.

[0027] See Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in this embodiment, the fusible material is polyethylene, polypropylene, or polyvinyl chloride.

[0028] It should be noted that all three materials have good chemical corrosion resistance, which can ensure that the extinguishing liquid does not deteriorate during long-term storage.

[0029] In this embodiment, the extinguishing liquid is heptafluoropropane, hexafluoropropane, or perfluorohexanone. After the extinguishing liquid is vaporized into an inert gas, the oxygen concentration in the protected area can be reduced, thus inhibiting the combustion reaction.

[0030] It should be noted that the extinguishing liquid has the characteristics of rapid vaporization and suffocation extinguishing. After the extinguishing liquid pipe 10 ruptures, it can completely vaporize into an inert gas within 1 second, causing the oxygen concentration in the protected area to drop rapidly, extinguishing the initial open flame within 3 seconds. Especially for localized overheating fires of electrical equipment, the extinguishing efficiency is significantly improved compared to traditional dry powder extinguishing agents. Among them, heptafluoropropane has a low extinguishing concentration requirement, hexafluoropropane has a faster vaporization and diffusion rate, and perfluorohexanone has a lower extinguishing threshold. It can be flexibly selected according to the size and airtightness of the protected space to ensure that there are no dead corners in confined spaces, such as the gap of LED display module 60 and the cavity of power module.

[0031] In this embodiment, the fixed fire extinguishing pipe sleeve 20 is provided with an arc-shaped groove that matches the shape of the fire extinguishing liquid pipe 10, and the fire extinguishing liquid pipe 10 is embedded in the arc-shaped groove.

[0032] It should be noted that when the extinguishing liquid is placed flat or simply bound and fixed, it is easily displaced due to equipment vibration, installation errors, etc., resulting in poor contact between the conductive coating 11 and the metal conductive sheet 21, causing intermittent circuit breaks or failure of the protection function. The curvature of the arc-shaped groove is precisely matched with the outer contour of the extinguishing liquid tube 10. After the extinguishing liquid tube 10 is embedded, an interference fit is formed. The elastic deformation of the fixing sleeve 20 of the extinguishing pipe generates a continuous clamping force, ensuring that the extinguishing liquid tube 10 maintains a stable position under vibration, impact and other conditions, so that the conductive coating 11 and the metal conductive sheet 21 maintain continuous and tight contact, and maintain reliable circuit conduction. The opening of the arc-shaped groove faces the protected area. When the extinguishing liquid tube 10 melts and ruptures, the side wall of the groove can constrain the spray direction of the extinguishing liquid, reduce the diffusion to the non-protected area, and concentrate the release of the extinguishing liquid into the protected area, rapidly increasing the concentration of extinguishing gas in the area. The fire extinguishing pipe sleeve 20 is made of high-temperature resistant insulating material and can be integrally molded. It not only fixes the fire extinguishing liquid pipe 10 through the groove structure, but also isolates the metal conductive sheet 21 from the equipment shell, avoiding the risk of short circuit and simplifying the overall structure.

[0033] In this embodiment, the inner wall of the arc-shaped groove is coated with a high-temperature resistant insulating coating with a thickness of 0.1-0.3 mm.

[0034] It should be noted that when the fire extinguishing liquid pipe 10 ruptures, the high-temperature fire extinguishing liquid directly contacts the inner wall of the rubber sleeve, which will cause the rubber sleeve materials such as silicone rubber and fluororubber to soften and deform. In the high-temperature environment triggered by fire extinguishing, the insulating coating reduces the risk of leakage and prevents secondary electrical accidents.

[0035] In this embodiment, the incoming line of the fireproof device is electrically connected to the incoming line of the power supply; The power input terminal of the fireproof device is electrically connected to the power input terminal of the LED display light-emitting module; The incoming line of the fireproof device is electrically connected to the incoming line of the PCB lamp board.

[0036] It should be noted that when LED display light-emitting modules, PCB light boards and other terminal equipment overheat and catch fire due to local faults such as short circuits or overcurrent of LED beads, they cannot respond in time, and the risk of fire spreading is high. Traditional fire prevention devices with independent power supply require additional wiring, which increases the installation cost of a single device. Independently monitored fire prevention devices are easily affected by ambient temperature fluctuations, and frequent triggering will interrupt the normal operation of the equipment and increase the maintenance burden.

[0037] Specifically, in this embodiment, the fire protection device's input terminal is electrically connected to the power supply input line. Utilizing the thermal conduction characteristics of the power supply input line, when the power circuit experiences an overload or short circuit, causing the input line temperature to rise to the trigger threshold of the molten material, the molten material will rupture due to heat, releasing the fire extinguishing liquid and achieving full-area protection for the entire power supply system.

[0038] Specifically, in this embodiment, the fireproof device's inlet can also be electrically connected to the LED display's light-emitting module's inlet. The fireproof device's inlet is connected in series with the LED module's inlet. When the LED beads inside the module are short-circuited or overcurrent occurs, the inlet temperature rises rapidly and is directly conducted to the molten parts of the fireproof device, triggering the fire extinguishing mechanism. This achieves localized and precise protection for a single module, preventing the fire from spreading to other modules.

[0039] Specifically, in this embodiment, the fireproof device's inlet can also be directly thermally coupled to the PCB lamp board's inlet. When the lamp beads or driving circuit on the lamp board malfunction and generate heat, the heat is instantly conducted to the inlet, triggering the fireproof device to release extinguishing liquid, thus achieving point-level protection at the front end with the fastest response speed.

[0040] Example 3 Based on Embodiment 1 or Embodiment 2, this embodiment provides further technical solutions.

[0041] See Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a power module includes a fireproof device as described in any one of the embodiments, and the power module further includes a power body 40 and a power protection cover 50; The power supply body 40 has a power output terminal, the inlet terminal of the fireproof device is electrically connected to the power output terminal, and the outlet terminal of the fireproof device is used to connect to an external load. The power protection cover 50 covers the power body 40 and together with the power body 40 forms a closed accommodating space. The fireproof device is fixedly installed in the closed accommodating space near the heat-generating area of ​​the power body 40. When the ambient temperature of the power module reaches the preset melting point of the fire extinguishing liquid tube 10 in the fire protection device, the fire extinguishing liquid tube 10 ruptures, cutting off the conduction circuit between the power supply body 40 and the external load, and the fire extinguishing liquid encapsulated in the fire extinguishing liquid tube 10 instantly vaporizes into inert gas, covering the power supply body 40 to extinguish the fire.

[0042] It should be noted that traditional power modules rely solely on fuses for overcurrent protection, which cannot address the risk of fire caused by component overheating or insulation aging. Even after power is cut off, any existing flames will continue to burn, potentially causing the power supply unit to burn out or even spread to external loads. In non-enclosed power modules, extinguishing gases diffuse rapidly and cannot reach an effective extinguishing concentration in a short time.

[0043] Specifically, in this embodiment, the fire extinguishing liquid tube 10 of the fire prevention device is made of a fusible material with a preset melting point. When the temperature of the heating area of ​​the power supply body 40 reaches the melting point, the fire extinguishing liquid tube 10 ruptures due to heat, causing the conductive coating 11 on the surface of the fire extinguishing liquid tube 10 to separate from the metal conductive sheet 21, physically cutting off the conductive circuit between the power supply body 40 and the external load, thus curbing the spread of fire from the source. The power protection cover 50 and the power supply body 40 together form a closed containment space. After the fire extinguishing liquid tube 10 ruptures, the fire extinguishing liquids such as heptafluoropropane and perfluorohexanone encapsulated inside instantly vaporize into inert gases, which rapidly diffuse within the closed space, causing the oxygen concentration in the protected area to drop rapidly. At the same time, the inert gas covers the heating surface of the power supply body 40, quickly extinguishing open flames. The fire prevention device is fixed near the heating area of ​​the power supply body 40, directly sensing the temperature change of the heat source, avoiding interference from ambient temperature, and ensuring that the protection mechanism is triggered immediately in the early stage of fire, with the shortest response time. In this application, the physical circuit disconnection and active fire extinguishing are achieved simultaneously. This not only blocks the power supply to the fire source but also quickly extinguishes the open flames, completely preventing the power supply body 40 from burning and the external load from being affected. Compared with traditional single power outage protection, this reduces fire losses.

[0044] In this embodiment, the power protection cover 50 is provided with an aerogel heat insulation layer with a thickness of 2-5mm on the inner side facing the power body 40. The power module also includes a temperature warning module, which is electrically connected to the metal conductive sheet 21 of the fire protection device. When the ambient temperature reaches 80% of the preset melting point of the fire extinguishing liquid pipe 10, the temperature warning module sends a wireless warning signal to the external monitoring terminal.

[0045] It should be noted that this embodiment provides a further technical solution: after the fire extinguishing device is triggered, the high temperature generated by the vaporization of the extinguishing liquid will be rapidly conducted to the power protection cover 50, causing a sudden rise in the surface temperature of the cover, which may damage surrounding equipment. Simultaneously, the high temperature can accelerate the aging of the cover material, shortening the module's lifespan. In this embodiment, during fire extinguishing, the aerogel insulation layer isolates the surface temperature of the power protection cover 50 from the outside environment, avoiding the risk of damage to external equipment.

[0046] Example 4 Further technical solutions are provided based on Embodiment 1, Embodiment 2, or Embodiment 3.

[0047] See Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, an LED display screen includes the fireproof device described in any one of the embodiments. The LED display screen includes a plurality of LED display modules 60, and the plurality of LED display modules 60 are spliced ​​together to form an LED display screen. The LED display module 60 is equipped with a fireproof device, and the input terminal of the fireproof device is connected to the 220V input circuit of the LED display module 60. When the ambient temperature of the LED display module 60 reaches the preset melting point of the fire extinguishing liquid tube 10, the fire extinguishing liquid tube 10 automatically ruptures, cutting off the circuit.

[0048] It should be noted that LED displays use a multi-module splicing structure. If a single module catches fire due to a short circuit or overheating of its LED beads, the rapid heat conduction and flame spread can easily spread to surrounding modules and even the entire screen. Traditional fuses can only cut off the circuit of a single module and cannot extinguish the open flame, easily burning the entire screen. In this embodiment, each LED display module 60 is equipped with its own fireproof device, with the input terminal directly connected to the module's 220V input circuit. When the protection of a single module is triggered, it does not affect the normal operation of other modules, blocking the path of fire spread. In this embodiment, each LED display module 60 is equipped with a fireproof device. When the temperature of the LED display module 60 is too high, the 220V input circuit is cut off, eliminating the risk of arcing and electric shock.

[0049] In this embodiment, a power supply module equipped with a fireproof device is mounted on the LED display module 60; The LED display module 60 is mounted on the housing 70 so that a sealed space is formed between the LED display module 60 and the housing 70. When the ambient temperature of the LED display module 60 or the power module reaches the preset melting point of the fire extinguishing liquid tube 10, the fire extinguishing liquid tube 10 will automatically rupture.

[0050] It should be noted that the power module with fireproof device is directly fixed to the LED display module 60. The temperature linkage between the power supply and the LED module is realized by contact heat conduction. The overheating temperature of either module can be quickly conducted to the fire extinguishing liquid pipe 10 of the fireproof device, ensuring that the two trigger protection synchronously and eliminating protection blind spots.

[0051] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0053] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fire prevention device, characterized in that, Includes fire extinguishing liquid pipe, fixed fire extinguishing pipe sleeve, terminal block, inlet terminal, and outlet terminal; The outer surface of the fire extinguishing liquid pipe is coated with a conductive coating, and the fire extinguishing liquid pipe is placed on the fixed fire extinguishing pipe sleeve. The fixed fire extinguishing pipe sleeve is provided with a metal conductive sheet, which is electrically connected to the inlet end and the outlet end respectively. When the fire extinguishing liquid tube is placed on the fixed fire extinguishing tube sleeve, the conductive coating comes into contact with the metal conductive sheet to form a conductive circuit. The fire extinguishing liquid tube is made of a fusible material with a preset melting point. When the ambient temperature reaches the preset melting point, the fire extinguishing liquid tube ruptures, cutting off the conductive circuit. The fire extinguishing liquid encapsulated inside the fire extinguishing liquid tube instantly vaporizes into an inert gas to cover the protected area and extinguish the fire.

2. The fire prevention device according to claim 1, characterized in that, The fusible material is polyethylene, polypropylene, or polyvinyl chloride.

3. A fire prevention device according to claim 1, characterized in that, The extinguishing liquid is heptafluoropropane, hexafluoropropane, or perfluorohexanone. After the extinguishing liquid is vaporized into an inert gas, it can reduce the oxygen concentration in the protected area and inhibit the combustion reaction.

4. A fire prevention device according to claim 1, characterized in that, The fixed fire extinguishing pipe sleeve has an arc-shaped groove that matches the shape of the fire extinguishing liquid pipe, and the fire extinguishing liquid pipe is embedded in the arc-shaped groove.

5. A fire prevention device according to claim 4, characterized in that, The inner wall of the arc-shaped groove is coated with a high-temperature resistant insulating coating with a thickness of 0.1-0.3 mm.

6. A fire prevention device according to claim 1, characterized in that, The fire protection device's inlet terminal is electrically connected to the power supply's inlet terminal; The power input terminal of the fireproof device is electrically connected to the power input terminal of the LED display light-emitting module; The incoming line of the fireproof device is electrically connected to the incoming line of the PCB lamp board.

7. A power supply module, characterized in that, The power module includes a fire protection device according to any one of claims 1 to 6, wherein the power module further includes a power supply body and a power supply protective cover; The power supply body has a power output terminal, the inlet terminal of the fireproof device is electrically connected to the power output terminal, and the outlet terminal of the fireproof device is used to connect to an external load. The power protection cover is fitted onto the power body, forming a closed enclosure together with the power body. The fireproof device is fixedly installed in the closed enclosure near the heat-generating area of ​​the power body. When the ambient temperature of the power module reaches the preset melting point of the fire extinguishing liquid tube in the fire protection device, the fire extinguishing liquid tube ruptures, cutting off the conductive circuit between the power supply body and the external load. The fire extinguishing liquid encapsulated in the fire extinguishing liquid tube instantly vaporizes into an inert gas, covering the power supply body to extinguish the fire.

8. A power module according to claim 7, characterized in that, The power supply protection cover has an aerogel insulation layer with a thickness of 2-5mm on the inner side facing the power supply body. The power module also includes a temperature warning module, which is electrically connected to the metal conductive sheet of the fire protection device. When the ambient temperature reaches 80% of the preset melting point of the fire extinguishing liquid pipe, the temperature warning module sends a wireless warning signal to an external monitoring terminal.

9. An LED display screen, characterized in that, The fire protection device includes any one of claims 1 to 6, wherein the LED display screen comprises a plurality of LED display modules, and the plurality of LED display modules are spliced ​​together to form an LED display screen; The LED display module is equipped with a fireproof device, and the input terminal of the fireproof device is connected to the 220V input circuit of the LED display module. When the ambient temperature of the LED display module reaches the preset melting point of the fire extinguishing liquid tube, the fire extinguishing liquid tube automatically ruptures, cutting off the circuit.

10. An LED display screen according to claim 9, characterized in that, The power module equipped with a fireproof device is located on the LED display module; The LED display module is mounted on the housing so that a sealed space is formed between the LED display module and the housing. When the ambient temperature of the LED display module or power module reaches the preset melting point of the fire extinguishing liquid tube, the fire extinguishing liquid tube will automatically rupture.

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