An LED explosion-proof lighting lamp

Abstract

This invention discloses an LED explosion-proof lighting lamp, including a protective plate. The protective plate is characterized by a substrate threadedly connected to its upper surface, a heat dissipation module fixedly mounted on the upper surface of the substrate, a protective shell fixedly mounted on the upper surface of the heat dissipation module, an electrical module installed inside the protective shell, a liquid cooling device mounted above the electrical module, and a plurality of light-transmitting holes evenly distributed on the protective plate. Each light-transmitting hole is shaped like a frustum with a larger opening at the bottom and a smaller opening at the top. The light-transmitting holes are interconnected, and each light-transmitting hole contains an LED bead. The LED bead is encapsulated for protection, and the encapsulation meets the requirements of the explosion-proof encapsulation standard. The LED bead is fixedly mounted on the substrate. This device solves the problem of poor heat dissipation in current explosion-proof lamps.

Description

Technical Field

[0001] This invention belongs to the field of explosion-proof lighting technology, and specifically relates to an LED explosion-proof lighting lamp. Background Technology

[0002] my country's explosion-proof standards are consistent with the IEC (International Electrotechnical Commission), clearly classifying hazardous locations for explosive gases into three zones: Zone 0, Zone 1, and Zone 2. Zone 1 refers to locations where explosive gas mixtures may occur under normal start-up, operation, shutdown, loading and unloading of flammable materials, opening and closing of sealed container lids, and when safety valves, discharge valves, and plant equipment are operating within specified limits. In these zones, the duration of explosive gas mixtures is 10–1000 hours per year.

[0003] Existing explosion-proof lighting fixtures use LED chips as the light source. Without an explosion-proof enclosure, they are difficult to use in Zone 1 hazardous locations with explosive gases. Furthermore, explosion-proof lights are typically used in flammable and explosive environments such as chemical plants and oil depots, where the safety requirements for lighting fixtures are extremely high. If the lighting fixture overheats due to poor heat dissipation, it may cause safety hazards, such as damage to internal circuit components or aging of insulation materials. These failures can lead to fixture malfunction or even serious consequences such as fire or explosion. Therefore, a good heat dissipation design is an indispensable part of explosion-proof lighting. Summary of the Invention

[0004] The purpose of this invention is to provide an LED explosion-proof lighting lamp for existing devices, in order to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an LED explosion-proof lighting lamp, including a protective plate, characterized in that a substrate is threadedly connected to the upper part of the protective plate, a heat dissipation module is fixedly disposed on the upper part of the substrate, a protective shell is fixedly disposed on the upper part of the heat dissipation module, an electrical module is installed inside the protective shell, and a liquid cooling device is disposed on the upper part of the electrical module.

[0006] The protective plate is evenly provided with a number of light-transmitting holes, and each light-transmitting hole is a quadrangular frustum with a large opening at the bottom and a small opening at the top. The light-transmitting holes are interconnected, and each light-transmitting hole is provided with an LED lamp bead. The LED lamp bead is fixedly installed on the substrate and is protected by potting, and the potting meets the requirements of the explosion-proof potting standard, that is, under the premise that the net space is not greater than 1cm³, the minimum thickness of the potting compound is from the net space to the free surface / with bonded non-metallic or metal shell / without bonded non-metallic or metal shell not exceeding 1mm.

[0007] The heat dissipation module is a hollow, square-shell structure. Several vents are located at the bottom of the module, and each vent houses a fan shroud. A miniature exhaust fan is fixedly installed above the fan shroud in each vent. Several cold air channels are evenly distributed above the heat dissipation module. These cold air channels are circular tubes, with their lower ends connected to the heat dissipation module. A second circular baffle is glued to the upper end of each cold air channel. Four second vents are evenly distributed on the second circular baffle, and a ventilation opening is located in the center of the second circular baffle. A connecting rod is inserted through the hole. A first circular baffle is glued to the upper end of the connecting rod. Four first ventilation openings are evenly distributed on the first circular baffle, and the second ventilation openings are staggered with the first ventilation openings. A force-bearing plate is glued to the lower end of the connecting rod. A spring is sleeved on the connecting rod between the second circular baffle and the force-bearing plate. The first circular baffle, the first ventilation openings, the connecting rod, the spring, and the force-bearing plate together form a one-way ventilation assembly. A temperature equalization cylinder is also rotatably connected inside the cold air passage. Several spiral blades are evenly distributed inside the temperature equalization cylinder.

[0008] The present invention further describes that the liquid cooling device is a square shell structure with an open bottom. The liquid cooling device is equipped with a piston inside. Several first cold pipes are connected to the upper part of the opposite sides of the liquid cooling device, and several second cold pipes are connected to the upper part of the other opposite sides of the liquid cooling device. The first cold pipes and the second cold pipes are tightly attached to the liquid cooling device in sequence. The protective shell extends to the top of the heat dissipation module. Several vent holes are opened on the outer side of the lower end of the first cold pipes and the second cold pipes.

[0009] The present invention further illustrates that the interior of the liquid cooling device, located above the piston, stores coolant.

[0010] The present invention further illustrates that the protective plate is also provided with a plurality of vent holes and countersunk screw holes evenly distributed.

[0011] The present invention further illustrates that a thermal protection switch is also installed on the substrate.

[0012] The present invention further illustrates that the outer side of the protective shell is provided with a plurality of heat dissipation fins.

[0013] The present invention further illustrates that the protective plate is made of insulating, explosion-proof, and high-temperature resistant materials such as DMC.

[0014] The present invention further illustrates that the protective shell is sealed and installed on the heat dissipation module, and the interior of the protective shell is filled with an inert gas such as nitrogen or argon.

[0015] This invention further explains that when the LED explosion-proof lighting is turned on, due to its low electro-optical conversion efficiency and power loss, it emits a large amount of heat. At this time, the inert gas molecules inside the protective shell absorb this heat and intensify their thermal motion, leading to an increase in the average distance between molecules. This increase in intermolecular distance causes the total volume of the inert gas to expand, thereby pushing the piston upwards. The rising of the piston forces the coolant to flow into the first and second cold pipes. Since the first and second cold pipes are in close contact with the protective shell, the coolant cools the inert gas inside the protective shell through heat conduction. The inert gas cools the electrical module, thereby cooling the LED explosion-proof lighting. As the LED explosion-proof lighting cools down, the temperature of the inert gas also decreases, causing the total volume of the inert gas to shrink. The piston moves downward, causing the coolant to flow back into the liquid cooling device through the first and second cooling pipes. It is worth noting that when the inert gas is not expanding at room temperature, i.e., the initial position of the piston is at the bottom of the liquid cooling device, and the bottom of the liquid cooling device is provided with a protrusion to block the piston from falling out of the liquid cooling device due to the shrinkage of the total volume of the inert gas under low temperature conditions.

[0016] This invention further explains that when the liquid cooling device alone is insufficient to effectively cool the LED explosion-proof lighting, the heat dissipation module plays a heat dissipation role. First, the miniature exhaust fan is activated, drawing in relatively cool air from the environment. The cold air enters the heat dissipation module through the vent and flows upwards. It then pushes the force-bearing plate upwards through the cold airflow channel. The upward movement of the force-bearing plate, via the connecting rod, causes the first circular baffle to rise. As the air flows upwards through the cold airflow channel, it passes through the temperature equalization cylinder and the spiral blades. Due to Bernoulli's principle, when the air flows upwards and blows over the spiral blades, the spiral blades cause the temperature equalization cylinder to rotate, thus rotating the internal air as well. This allows for thorough mixing of air at different temperatures within the temperature equalization cylinder, achieving a uniform temperature distribution within the cylinder. Through heat transfer, the air carries away heat from the cold airflow channel, becoming hot air and flowing out from above the cold airflow channel, thereby dissipating the cold airflow. As the temperature of the inert gas outside the cold airflow channel decreases, these low-temperature inert gases will naturally convection with the higher-temperature inert gases, forming a closed loop flow. This achieves rapid cooling of the inert gases, which then cools the LED explosion-proof lighting lamp through heat transfer. Simultaneously, the spring is compressed, preventing the first circular baffle from colliding with the second circular baffle when it rises, thus avoiding shortening the lifespan of the components. The cold air absorbs heat and transforms into hot air through the heat dissipation module and the cold airflow channel. After the first circular baffle rises, airflow is allowed to pass through. The hot air flows out sequentially through the second vent on the second circular baffle and the first vent on the first circular baffle, thereby carrying away heat. The cold air continuously enters, absorbs heat, and transforms into hot air, continuously being discharged to achieve continuous cooling of the LED explosion-proof lighting lamp. After the LED explosion-proof lighting lamp is cooled, the miniature exhaust fan is turned off, and the first circular baffle descends to its initial position.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) By setting up a heat dissipation module, the micro exhaust fan is turned on first to draw out the relatively low temperature air in the environment. The cold air enters the heat dissipation module from the vent and flows upward. Then it pushes the force plate upward through the cold air channel. The force plate moves upward and drives the first circular baffle to rise through the connecting rod. When the air flows upward in the cold air channel, it passes through the inside of the uniform temperature cylinder and through the spiral blade. Due to Bernoulli's principle, when the air flows upward and blows through the spiral blade, the spiral blade will drive the uniform temperature cylinder to start rotating, thereby driving the internal air to rotate together, so that the air of different temperatures inside the uniform temperature cylinder is fully mixed, thereby achieving a uniform distribution of air temperature in the uniform temperature cylinder. The heat of the cold air channel is carried away by heat transfer and becomes hot air flowing out from the top of the cold air channel, thereby reducing the temperature of the cold air channel. When the temperature of the inert gas outside the cold air channel decreases, these low temperature inert gases will naturally convection with the higher temperature inert gases to form a closed loop flow, thereby achieving rapid cooling of the inert gas, and then cooling of the LED explosion-proof lighting lamp through heat transfer.

[0019] (2) By providing a liquid cooling device, when the total volume of the inert gas inside the protective shell expands, it pushes the piston upward. The rise of the piston squeezes the coolant to flow into the first and second cold pipes. Since the first and second cold pipes are in close contact with the protective shell, the coolant cools the inert gas inside the protective shell through the principle of heat conduction. The inert gas cools the electrical module, thereby cooling the LED explosion-proof lighting lamp. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present invention from another perspective;

[0023] Figure 3 This is a cross-sectional view of an embodiment of the present invention with the cold airflow channel as the cutting point;

[0024] Figure 4 This is a cross-sectional view of an embodiment of the present invention with the first cold pipe as the cutting point;

[0025] Figure 5 This is an enlarged view of region A in an embodiment of the present invention;

[0026] Figure 6 This is an enlarged view of region B in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the liquid cooling principle flow according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of a temperature equalization cylinder according to an embodiment of the present invention;

[0029] In the diagram: 1. Protective plate; 2. Base plate; 3. Heat dissipation module; 4. Protective shell; 5. Electrical module; 6. Liquid cooling device;

[0030] 11. Light-transmitting hole; 12. Exhaust hole; 13. Countersunk screw hole; 21. LED bead; 31. Fan cover; 32. Miniature exhaust fan; 33. Cold air flow channel; 34. One-way ventilation assembly; 341. First circular baffle; 342. First vent; 343. Connecting rod; 344. Spring; 345. Force-bearing plate; 35. Second circular baffle; 351. Second vent; 352. Through hole; 36. Vent; 37. Temperature equalizing cylinder; 371. Spiral blade; 41. Heat dissipation fins; 61. Piston; 62. First cooling pipe; 63. Second cooling pipe; 64. Vent; 65. Coolant. Detailed Implementation

[0031] The following is a non-limiting detailed description of the technical solutions of the present invention in conjunction with preferred embodiments and the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0032] refer to Figures 1 to 7 The present invention provides an LED explosion-proof lighting lamp. Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention, as shown below. Figures 1 to 3As shown, the LED explosion-proof lighting lamp includes a protective plate 1, a base plate 2 threadedly connected to the top of the protective plate 1, a heat dissipation module 3 fixedly mounted on the top of the base plate 2, a protective shell 4 fixedly mounted on the top of the heat dissipation module 3, an electrical module 5 installed inside the protective shell 4, and a liquid cooling device 6 mounted on the top of the electrical module 5. The protective plate 1 is one of the core components of the lighting lamp, providing basic protection against external physical impacts or chemical corrosion that could damage the lamp's internal components. The base plate 2, threadedly connected to the top of the protective plate 1, ensures structural stability and facilitates disassembly and maintenance when necessary. The heat dissipation module 3 is a key component of the lighting lamp's heat dissipation system, designed to effectively dissipate the heat generated by the LED during operation, ensuring stable operation and extending the lamp's lifespan. The main function of the protective shell 4 is to protect the internal electrical module 5 from external environmental interference and damage. The electrical module 5 is the control center of the lighting lamp, responsible for providing a stable power supply and control signals to ensure the normal illumination and operation of the LED. The liquid cooling device 6 is a highly efficient heat dissipation method. It uses a circulating liquid to remove the heat generated by the electrical module 5, further improving the heat dissipation performance of the lighting fixture. The design of the liquid cooling device 6 not only improves heat dissipation efficiency but also helps maintain a uniform temperature distribution inside the lighting fixture, thereby extending the lifespan of the LED light.

[0033] like Figure 1 As shown, the protective plate 1 has several evenly spaced light-transmitting holes 11, each of which is a truncated pyramid shape with a larger opening at the bottom and a smaller opening at the top. The light-transmitting holes 11 are interconnected, and each light-transmitting hole 11 contains an LED bead 21. The LED bead 21 is fixedly mounted on the substrate 2, and is protected by encapsulation to meet the requirements of the explosion-proof encapsulation standard. Specifically, with a net space not exceeding 1 cm³, the minimum thickness of the encapsulation compound must be no more than 1 mm from the net space to the free surface / with bonded non-metallic or metallic shell / without bonded non-metallic or metallic shell. This design ensures safe application in Zone 1 explosion-proof locations, providing long-lasting explosion-proof lighting. The production cost is controllable, and the market application prospects are broad. The design of the light-transmitting holes 11 effectively ensures that the light transmission efficiency of the LED bead 21 is not affected. The interconnected bottoms of the light-transmitting holes 11 facilitate heat dissipation. During the encapsulation process, the dispensing and encapsulation process is unimpeded, resulting in uniform pouring and good performance.

[0034] like Figures 3 to 6As shown, the heat dissipation module 3 is a hollow, square-shell structure. Several vents 36 are provided at the bottom of the heat dissipation module 3. Each vent 36 has a fan shroud 31 inside, and a miniature exhaust fan 32 is fixedly installed above the fan shroud 31 inside each vent 36. The miniature exhaust fan 32 is used to draw in relatively cool air from the environment, allowing cool air to enter the shell-shaped heat dissipation module 3 through the vents 36. Several cold air channels 33 are evenly distributed on the top of the heat dissipation module 3. The cold air channels 33 are circular tube structures, and their lower ends connect to the heat dissipation module 3. A second circular baffle 35 is glued to the upper end of each cold air channel 33. Four second vents 351 are evenly distributed on the second circular baffle 35. A through hole 352 is provided in the center of the second circular baffle 35. A connecting rod 343 passes through the through hole 352, and a first circular baffle 341 is glued to the upper end of the connecting rod 343. Four first ventilation openings 342 are evenly provided on the circular baffle 341, and the second ventilation openings 351 are staggered with the first ventilation openings 342. A force-bearing plate 345 is glued to the lower end of the connecting rod 343. A spring 344 is sleeved on the connecting rod 343 between the second circular baffle 35 and the force-bearing plate 345, and the two ends of the spring 344 are glued to the opposite sides of the second circular baffle 35 and the force-bearing plate 345, respectively, to ensure that the second ventilation openings 351 and the first ventilation openings 342 are always staggered. The first circular baffle 341, the first ventilation openings 342, the connecting rod 343, the spring 344, and the force-bearing plate 345 together form a one-way ventilation assembly 34. A temperature equalization cylinder 37 is also rotatably connected inside the cold air passage 33, and a number of spiral blades 371 are evenly provided inside the temperature equalization cylinder 37. Cold air flows upward within the heat dissipation module 3, then upward through the cold airflow channel 33, pushing the force-bearing plate 345 upward. The force-bearing plate 345 moves upward, causing the first circular baffle 341 to rise via the connecting rod 343. As the cold air flows through the heat dissipation module 3 and the cold airflow channel 33, it absorbs heat and transforms into hot air due to heat transfer. After the first circular baffle 341 rises, the second circular baffle 35 and the first circular baffle 341 are no longer in contact, allowing airflow to pass through. The hot air flows out sequentially through the second vent 351 on the second circular baffle 35 and the first vent 342 on the first circular baffle 341.As air flows upward through the cold airflow channel 33, it passes through the interior of the temperature equalization cylinder 37 and through the spiral blade 371. Due to Bernoulli's principle, when the air flows upward and blows over the spiral blade 371, different pressures are generated above and below the spiral blade 371 due to the cross-sectional shape of the spiral blade 371 and the characteristics of airflow. That is, a pressure difference is generated below and above the spiral blade 371. This pressure difference generates an upward lift force, causing the spiral blade 371 to drive the temperature equalization cylinder 37 to start rotating. The rotation of the spiral blade 371 and the temperature equalization cylinder 37 helps to drive the internal air to rotate together, forming a complex flow pattern, thereby achieving air mixing. This flow pattern helps to break up temperature stratification, allowing air of different temperatures inside the temperature equalization cylinder 37 to mix fully, thereby achieving a uniform distribution of air temperature within the temperature equalization cylinder 37. The uniform temperature distribution within the temperature equalization cylinder 37 facilitates the removal of heat from the cold airflow channel 33 via heat transfer, resulting in hot air flowing out from above the cold airflow channel 33. This lowers the temperature of the cold airflow channel 33. As the temperature of the inert gas outside the cold airflow channel 33 decreases, a temperature gradient forms between these low-temperature inert gases and the higher-temperature inert gases. Under this temperature gradient, natural convection occurs within the inert gas, causing it to spontaneously flow from the high-temperature region to the low-temperature region and then back from the low-temperature region to the high-temperature region, forming a closed-loop flow. This achieves rapid cooling of the inert gas, which is then used to cool the LED explosion-proof lighting lamp through heat transfer. The design of the second circular baffle 35 and the first circular baffle 341 ensures that no foreign objects fall into the cold airflow channel 33 under normal conditions.

[0035] In some preferred embodiments, such as Figure 2 and Figure 4 As shown, the liquid cooling device 6 is a square shell structure with an open bottom. The liquid cooling device 6 has a piston 61 inside. Several first cold pipes 62 are connected to the upper part of the opposite sides of the liquid cooling device 6. Several second cold pipes 63 are connected to the upper part of the other opposite sides of the liquid cooling device 6. The first cold pipes 62 and the second cold pipes 63 are tightly attached to the liquid cooling device 6 and the protective shell 4, extending to the top of the heat dissipation module 3. Several vent holes 64 are opened on the outer side of the lower end of the first cold pipes 62 and the second cold pipes 63.

[0036] In some preferred embodiments, such as Figure 7 As shown, the interior of the liquid cooling device 6, located above the piston 61, stores coolant 65.

[0037] In some optional embodiments, when the piston 61 is at the lowest point of the liquid cooling device 6, i.e., when the liquid cooling device 6 is full of coolant 65, it is necessary to ensure that when the piston 61 is at the highest point of the liquid cooling device 6, the coolant 65 flows completely into the first cooling pipe 62 and the second cooling pipe 63, and the lower horizontal surface of the coolant 65 is positioned above the vent 64. Due to the air pressure inside the liquid cooling device 6, the coolant 65 will not flow out from the vent 64.

[0038] In some preferred embodiments, such as Figure 1 As shown, the protective plate 1 is also evenly provided with several vent holes 12 and countersunk screw holes 13. The vent holes 12 are conducive to meeting the production requirements of rapid curing and uniform full coverage of adhesive, and the countersunk screw holes 13 are used for the threaded connection between the protective plate 1 and the substrate 2.

[0039] In some preferred embodiments, a thermal protection switch (not shown in the figure) is also installed on the substrate 2. LED explosion-proof lighting generates heat during operation. If this heat cannot be dissipated in time, it may damage components such as the LED beads and circuit boards. The thermal protection switch can monitor the internal temperature of the lamp in real time and automatically cut off the power supply when the temperature exceeds a set threshold, thereby protecting the lighting from damage. Furthermore, in extreme cases, if a short circuit or overload occurs inside the LED explosion-proof lighting, it may cause a rapid rise in temperature and lead to a fire. In such situations, the thermal protection switch can quickly cut off the power supply to prevent a fire.

[0040] In some preferred embodiments, such as Figure 2 As shown, the outer side of the protective shell 4 is provided with several heat dissipation fins 41. The heat dissipation fins 41 provide a larger heat radiation area by increasing the surface area of ​​the outer surface of the protective shell 4. This helps to accelerate the heat dissipation rate, because heat can be transferred to the surrounding environment more quickly through a larger area.

[0041] In some alternative embodiments, the heat sink fins 41 can be made of a metal with a high thermal conductivity, such as aluminum or copper, which can effectively conduct heat from the heat source to the surface of the heat sink fins 41, thereby improving the overall heat dissipation performance.

[0042] In some preferred embodiments, the protective plate 1 is made of insulating, explosion-proof, and high-temperature resistant materials such as DMC (dense molding compound). These materials have good insulation, explosion-proof, and high-temperature resistance, which not only improves the safety performance of LED explosion-proof lighting but also enhances its durability and reliability.

[0043] In some preferred embodiments, such as Figure 3As shown, the protective shell 4 is sealed and installed on the heat dissipation module 3, and the interior of the protective shell 4 is filled with an inert gas such as nitrogen or argon. This type of inert gas can effectively reduce the oxygen concentration, prevent the accumulation and mixing of explosive gases, reduce the risk of explosion, and thus improve the overall safety of the entire system. The inert gas can act as an additional safety barrier, reducing the risk of explosion caused by equipment failure, operational errors, or external factors. This helps ensure the safety of personnel and LED explosion-proof lighting, and reduces production accidents and property damage.

[0044] In the above embodiment, when the LED explosion-proof lighting is on, a large amount of heat is emitted due to the low electro-optical conversion efficiency and power loss. At this time, the inert gas molecules inside the protective shell 4 absorb the heat and intensify thermal motion, resulting in an increase in the average distance between molecules. The increase in the distance between molecules causes the total volume of the inert gas to expand, thereby pushing the piston 61 upward. The rise of the piston 61 compresses the coolant 65 into the interior of the first cold pipe 62 and the second cold pipe 63. Since the first cold pipe 62 and the second cold pipe 63 are in close contact with the protective shell 4, the coolant 65 cools the inert gas inside the protective shell 4 through the principle of heat conduction. The inert gas cools the electrical module 5, thereby cooling the LED explosion-proof lighting. When the LED explosion-proof lighting is cooled down, the temperature of the inert gas also decreases, causing the total volume of the inert gas to shrink. The piston 61 moves downward, causing the coolant 65 to flow back into the liquid cooling device 6 through the first cooling pipe 62 and the second cooling pipe 63. It is worth noting that when the inert gas has not expanded at room temperature, that is, when the piston 61 is initially located at the bottom of the liquid cooling device 6, and the bottom of the liquid cooling device 6 is provided with a protrusion to block the piston 61, there is no problem that the piston 61 will fall out of the liquid cooling device 6 due to the shrinkage of the total volume of the inert gas in a low-temperature environment.

[0045] The electrical module 5 includes functions such as controlling the switching of LED beads 21, temperature detection, and electrical control. When the liquid cooling device 6 alone is insufficient to effectively cool the LED explosion-proof lighting, that is, after the liquid cooling device 6 has been working for a period of time, it is detected that the LED explosion-proof lighting is still in a high-temperature state (the working time of the liquid cooling device 6 and the judgment of the high-temperature value are set according to the actual situation), the electrical module 5 will control the heat dissipation module 3 to perform heat dissipation. First, the miniature exhaust fan 32 is turned on to draw in the relatively cool air in the environment. The cold air enters the interior of the heat dissipation module 3 from the vent 36 and flows upward. Then, it pushes the force plate 345 upward through the cold air channel 33. The force plate 345 moves upward and drives the first circular baffle 341 to rise through the connecting rod 343. As air flows upward through the cold airflow channel 33, it passes through the interior of the temperature equalization cylinder 37 and through the spiral blade 371. Due to Bernoulli's principle, when the air flows upward and blows over the spiral blade 371, the spiral blade 371 drives the temperature equalization cylinder 37 to rotate, thereby causing the internal air to rotate as well. This allows the air of different temperatures inside the temperature equalization cylinder 37 to mix thoroughly, achieving a uniform temperature distribution within the temperature equalization cylinder 37. Heat is then transferred from the cold airflow channel 33, carrying away heat and turning the air into hot air that flows out from above the cold airflow channel 33, thus lowering the temperature of the cold airflow channel 33. When the temperature of the inert gas outside the cold airflow channel 33 decreases, these low-temperature inert gases will naturally convection with the higher-temperature inert gases, forming a closed loop flow. This achieves rapid cooling of the inert gases, which is then used to cool the LED explosion-proof lighting lamp through heat transfer. Simultaneously, the spring 344 is compressed. The compression of the spring 344 prevents the first circular baffle 341 from hitting the second circular baffle 35 when it rises, thus preventing a shortened component lifespan. Cold air absorbs heat through the heat dissipation module 3 and the cold air flow channel 33 and is transformed into hot air. After the first circular baffle 341 rises, airflow is allowed to pass through. The hot air flows out through the second vent 351 on the second circular baffle 35 and the first vent 342 on the first circular baffle 341, taking away heat. Cold air continuously enters, absorbs heat, and is transformed into hot air and continuously discharged to achieve continuous cooling of the LED explosion-proof lighting. After the LED explosion-proof lighting is cooled, the miniature exhaust fan 32 is turned off, and the first circular baffle 341 descends to its initial position.

[0046] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An LED explosion-proof lighting lamp, comprising a protective plate (1), characterized in that, The protective plate (1) is threadedly connected to a base plate (2), a heat dissipation module (3) is fixedly installed on the top of the base plate (2), a protective shell (4) is fixedly installed on the top of the heat dissipation module (3), an electrical module (5) is installed inside the protective shell (4), and a liquid cooling device (6) is installed on the top of the electrical module (5). The protective plate (1) is provided with a plurality of light-transmitting holes (11) evenly, and each light-transmitting hole (11) is a quadrangular frustum with a large opening at the bottom and a small opening at the top. The light-transmitting holes (11) are interconnected. Each light-transmitting hole (11) is provided with an LED lamp bead (21). The LED lamp bead (21) is fixedly installed on the substrate (2). The LED lamp bead (21) is potted and protected, and the potting meets the requirements of the explosion-proof potting standard. The heat dissipation module (3) is a hollow square shell structure. Several vents (36) are provided at the bottom of the heat dissipation module (3). A fan cover (31) is provided inside each vent (36). A miniature exhaust fan (32) is fixedly installed above the fan cover (31) inside each vent (36). Several cold air channels (33) are evenly distributed on the top of the heat dissipation module (3). The cold air channels (33) are circular tube structures, and the lower end of the cold air channels (33) is connected to the heat dissipation module (3). A second circular baffle (35) is glued to the upper end of each cold air channel (33). Four second ventilation openings (351) are evenly distributed on the second circular baffle (35). A through hole (352) is opened in the center of the second circular baffle (35). A connecting rod (351) is inserted in the through hole (352). 43), the upper end of the connecting rod (343) is glued with a first circular baffle (341), and four first ventilation openings (342) are evenly opened on the first circular baffle (341), and the second ventilation opening (351) and the first ventilation opening (342) are staggered. The lower end of the connecting rod (343) is glued with a force-bearing plate (345), and a spring (344) is sleeved on the connecting rod (343) between the second circular baffle (35) and the force-bearing plate (345). The first circular baffle (341), the first ventilation opening (342), the connecting rod (343), the spring (344) and the force-bearing plate (345) together form a one-way ventilation assembly (34). The interior of the cold air passage (33) is also rotatably connected with a temperature equalization cylinder (37), and the interior of the temperature equalization cylinder (37) is also evenly provided with a number of spiral blades (371). As air flows upward through the cold airflow channel (33), it passes through the interior of the temperature equalization cylinder (37) and through the spiral blade (371). Due to Bernoulli's principle, when the air flows upward and blows over the spiral blade (371), a pressure difference is generated between the bottom and top of the spiral blade (371) due to the cross-sectional shape of the spiral blade (371) and the characteristics of airflow. This generates an upward lift force, causing the spiral blade (371) to drive the temperature equalization cylinder (37) to start rotating, thereby causing the internal air to rotate as well, forming a flow pattern. This achieves air mixing. The flow pattern helps to break up temperature stratification, allowing air of different temperatures inside the temperature equalization cylinder (37) to mix thoroughly. This achieves a uniform distribution of air temperature within the temperature equalization cylinder (37) and carries away the heat from the cold airflow channel (33) through heat transfer, turning it into hot air and flowing out from above the cold airflow channel (33). This lowers the temperature of the cold airflow channel (33). When the temperature of the inert gas outside the cold airflow channel (33) decreases, these low-temperature inert gases will react with the higher-temperature gases. Inert gas undergoes natural convection. Under the condition of a temperature gradient, the internal inert gas will undergo natural convection, causing the gas to spontaneously flow from the high temperature area to the low temperature area, and then return from the low temperature area to the high temperature area, forming a closed loop flow, thereby achieving rapid cooling of the inert gas, and then cooling the LED explosion-proof lighting lamp through heat transfer. At the same time, the spring (344) is compressed, and the cold air absorbs heat through the heat dissipation module (3) and the cold air flow channel (33) and transforms into hot air. After the first circular baffle (341) rises, it allows airflow to pass through. The hot air flows out through the second vent (351) on the second circular baffle (35) and the first vent (342) on the first circular baffle (341) in sequence, thereby taking away heat. After the cold air continues to enter and absorb heat, it transforms into hot air and continues to be discharged, so as to achieve continuous cooling of the LED explosion-proof lighting lamp. After the LED explosion-proof lighting lamp is cooled, the miniature exhaust fan (32) is turned off, and the first circular baffle (341) falls down to the initial position.

2. The LED explosion-proof lighting lamp according to claim 1, characterized in that, The liquid cooling device (6) is a square shell structure with an open bottom. A piston (61) is provided inside the liquid cooling device (6). Several first cold pipes (62) are connected to the upper part of the opposite sides of the liquid cooling device (6). Several second cold pipes (63) are connected to the upper part of the other opposite sides of the liquid cooling device (6). The first cold pipes (62) and the second cold pipes (63) are tightly attached to the liquid cooling device (6) in sequence. The protective shell (4) extends to the top of the heat dissipation module (3). Several vent holes (64) are opened on the outer side of the lower end of the first cold pipes (62) and the second cold pipes (63).

3. The LED explosion-proof lighting lamp according to claim 2, characterized in that, The interior of the liquid cooling device (6) above the piston (61) contains coolant (65).

4. The LED explosion-proof lighting lamp according to claim 3, characterized in that, The protective plate (1) is also provided with several vent holes (12) and countersunk screw holes (13) evenly spaced.

5. The LED explosion-proof lighting lamp according to claim 4, characterized in that, A thermal protection switch is also installed on the substrate (2).

6. The LED explosion-proof lighting lamp according to claim 5, characterized in that, The outer side of the protective shell (4) is provided with several heat dissipation fins (41).

7. The LED explosion-proof lighting lamp according to claim 6, characterized in that, The protective plate (1) is made of DMC material.

8. The LED explosion-proof lighting lamp according to claim 7, characterized in that, The protective shell (4) is sealed and installed on the heat dissipation module (3), and the interior of the protective shell (4) is filled with inert gases such as nitrogen or argon.

9. A heat dissipation method for an LED explosion-proof lighting lamp as described in any one of claims 3-8, characterized in that, include: When the LED explosion-proof lighting is turned on, due to the low electro-optical conversion efficiency and power loss, a large amount of heat will be emitted. At this time, the inert gas molecules inside the protective shell (4) will absorb heat and intensify thermal motion, resulting in an increase in the average distance between molecules. The increase in the distance between molecules causes the total volume of the inert gas to expand, thereby pushing the piston (61) upward. The rise of the piston (61) squeezes the coolant (65) into the interior of the first cold pipe (62) and the second cold pipe (63). Since the first cold pipe (62) and the second cold pipe (63) are in close contact with the protective shell (4), the coolant (65) cools the inert gas inside the protective shell (4) through the principle of heat conduction. The inert gas cools the electrical module (5), thereby cooling the LED explosion-proof lighting lamp. When the LED explosion-proof lighting lamp is cooled down, the temperature of the inert gas decreases accordingly, causing the total volume of the inert gas to shrink. The piston (61) moves downward, causing the coolant (65) to flow back into the liquid cooling device (6) through the first cold pipe (62) and the second cold pipe (63). When the inert gas does not expand at room temperature, the initial position of the piston (61) is located at the bottom of the liquid cooling device (6), and the bottom of the liquid cooling device (6) is provided with a protrusion to block the piston (61). There is no problem that the piston (61) falls out of the liquid cooling device (6) due to the shrinkage of the total volume of the inert gas in a low-temperature environment.

10. The method according to claim 9, characterized in that: When the liquid cooling device (6) alone is insufficient to effectively cool the LED explosion-proof lighting, the heat dissipation module (3) plays a heat dissipation role. First, the miniature exhaust fan (32) is turned on to draw in air with a relatively low temperature in the environment. The cold air enters the interior of the heat dissipation module (3) from the vent (36) and flows upward. Then, it pushes the force plate (345) upward through the cold air channel (33). The force plate (345) moves upward and drives the first circular baffle (341) to rise through the connecting rod (343).

Images