LED explosion-proof illuminating lamp

Abstract

The invention discloses an LED explosion-proof illuminating lamp which comprises a protection plate and is characterized in that a substrate is in threaded connection with the upper portion of the protection plate, a heat dissipation module is fixedly arranged on the upper portion of the substrate, a protection shell is fixedly arranged on the upper portion of the heat dissipation module, and an electrical module is installed in the protection shell; a liquid cooling device is arranged above the electrical module, a plurality of light through holes are uniformly formed in the protection plate, each light through hole is in a quadrangular frustum pyramid shape with a large bottom opening and a small top opening, the light through holes are communicated with one another, an LED lamp bead is arranged in each light through hole, and the LED lamp beads are encapsulated and protected. The LED lamp beads are fixedly installed on the substrate, and the problem that an existing explosion-proof lamp is poor in heat dissipation function is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of explosion-proof lamps, and in particular relates to an LED explosion-proof lighting lamp. Background Art

[0002] my country's explosion prevention standards are consistent with IEC (International Electrotechnical Commission), and clearly divide explosive gas hazardous areas into zones 0, 1, and 2. Zone 1 refers to places where explosive gas mixtures may appear during normal start-up, operation, parking, loading and unloading of flammable products, opening and closing of sealed container covers, and working conditions of safety valves, discharge valves, and factory equipment within the specified requirements. In such areas, the existence time of explosive gas mixtures is 10 to 1000 hours per year.

[0003] Existing explosion-proof lamps use LED lamp beads as light sources. Without the use of flameproof chambers, it is difficult to make them suitable for Zone 1 explosive gas hazardous places. Moreover, explosion-proof lamps are usually used in flammable and explosive places, such as chemical plants and oil depots. These places have extremely high safety requirements for lamps. Once the temperature of the lamps rises due to poor heat dissipation, it may cause safety hazards, such as damage to circuit components inside the lamps and aging of insulating materials. These faults may cause lamp failure or cause serious consequences such as fire or explosion. Therefore, good heat dissipation design is an indispensable part of explosion-proof lamps. Summary of the invention

[0004] The purpose of the present invention is to provide an LED explosion-proof lighting lamp for existing devices to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an LED explosion-proof lighting lamp, comprising a protective plate, characterized in that a substrate is threadedly connected to the top of the protective plate, a heat dissipation module is fixedly arranged above the substrate, a protective shell is fixedly arranged above the heat dissipation module, an electrical module is installed inside the protective shell, and a liquid cooling device is arranged above the electrical module;

[0006] The protective plate is evenly provided with a plurality of light-through holes, and each of the light-through holes is in the shape of a quadrangular pyramid with a large bottom opening and a small top opening. The light-through holes are interconnected, and each of the light-through holes is provided with an LED lamp bead, which is fixedly mounted on the substrate, and the LED lamp bead is cast and protected, and the casting meets the requirements of the explosion-proof casting standard, that is, the premise net space is not greater than 1cm 3 In the case of the condition that the minimum thickness of the encapsulation compound from the clear space to the clear space or free surface / bonded non-metallic or metal shell / unbonded non-metallic or metal shell does not exceed 1mm;

[0007] The heat dissipation module is a square shell-shaped structure with a hollow interior, a plurality of vents are provided at the bottom of the heat dissipation module, a fan cover is provided inside each of the vents, a miniature exhaust fan is fixedly installed inside each of the vents and located above the fan cover, a plurality of cold air flow ducts are evenly penetrated above the heat dissipation module, the cold air flow ducts are circular tube structures, and the lower ends of the cold air flow ducts are connected to the heat dissipation module, a second circular baffle is glued to the inside of the upper end of each of the cold air flow ducts, four second vents are evenly provided on the second circular baffle, and a through hole is provided in the center of the second circular baffle A hole is provided, in which a connecting rod is passed through the through hole, a first circular baffle is glued to the upper end of the connecting rod, four first vents are evenly arranged on the first circular baffle, and the second vent and the first vent are staggered, a force-bearing sheet 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 sheet, the first circular baffle, the first vent, the connecting rod, the spring and the force-bearing sheet together constitute a one-way ventilation component, and a temperature-uniform cylinder is rotatably connected to the interior of the cold air flow duct, and a plurality of spiral leaves are evenly arranged inside the temperature-uniform cylinder.

[0008] The present invention further describes that the liquid cooling device is a square shell-shaped structure with an open lower end, a piston is provided inside the liquid cooling device, a plurality of first cold pipes are connected to the top of two opposite sides of the liquid cooling device, and a plurality of second cold pipes are connected to the top of two other opposite sides of the liquid cooling device, the first cold pipe and the second cold pipe are tightly fitted to the liquid cooling device in sequence, the protective shell extends to the top of the heat dissipation module, and a plurality of ventilation holes are opened on the outer sides of the lower ends of the first cold pipe and the second cold pipe.

[0009] The present invention further describes that the interior of the liquid cooling device is located above the piston and stores cooling liquid.

[0010] The present invention further describes that a plurality of exhaust holes and countersunk screw holes are evenly arranged on the protective plate.

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

[0012] The present invention further describes that a plurality of heat dissipation fins are disposed on the outer side of the protective shell.

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

[0014] The present invention further describes 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] The present invention further illustrates that when the LED explosion-proof lighting lamp is turned on, a large amount of heat will be emitted due to low electro-optical conversion efficiency and power loss. At this time, the inert gas molecules inside the protective shell 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 upward. The rise of the piston squeezes the coolant to flow into the inside of the first cold pipe and the second cold pipe. Since the first cold pipe and the second cold pipe 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 is used to cool the electrical module, thereby cooling the LED explosion-proof lighting lamp. When the LED explosion-proof lighting lamp is cooled as a whole, the temperature of the inert gas decreases accordingly, causing the total volume of the inert gas to shrink, and the piston moves downward, causing the coolant to flow back into the liquid cooling device from the first cooling pipe and the second cooling pipe. It is worth noting that when the inert gas is not expanded at room temperature, that is, the initial position of the piston is located at the bottom of the liquid cooling device, and a protrusion is provided at the bottom of the liquid cooling device to block the bottom of the piston. There is no problem of the piston falling out of the liquid cooling device due to the shrinkage of the total volume of the inert gas in a low temperature environment.

[0016] The present invention further illustrates that when it is difficult to effectively cool down the LED explosion-proof lighting by relying solely on the liquid cooling device, the heat dissipation module plays a heat dissipation role. First, the micro-exhaust fan is turned on to draw air with relatively low temperature in the environment. The cold air enters the interior of the heat dissipation module from the vent and flows upward. Then, it pushes the force-bearing plate upward through the cold air flow duct. The force-bearing plate moves upward and drives the first circular baffle plate to rise upward through the connecting rod. When the air flows upward in the cold air flow duct, it passes through the interior of the temperature-uniform cylinder and the spiral blades. Due to Bernoulli's principle, when the air flows upward and blows through the spiral blades, the spiral blades will drive the temperature-uniform cylinder to start rotating, thereby driving the internal air to rotate together, so that the air of different temperatures inside the temperature-uniform cylinder is fully mixed, thereby achieving uniform distribution of air temperature in the temperature-uniform cylinder and taking away the heat of the cold air flow duct through heat transfer to become hot air and flow out from above the cold air flow duct, thereby making the cold air flow The temperature of the cold air flow channel is reduced. When the temperature of the inert gas outside the cold air flow channel is reduced, these low-temperature inert gases will undergo natural convection with the higher-temperature inert gas to form a closed circulation 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 is compressed. The compression of the spring prevents the first circular baffle from hitting the second circular baffle when it rises upward, thereby shortening the life of the parts. The cold air absorbs heat through the heat dissipation module and the cold air flow channel and is converted into hot air. After the first circular baffle rises upward, air flow is allowed to pass through, and the hot air flows out through the second vent on the second circular baffle and the first vent on the first circular baffle in turn, thereby taking away the heat. The cold air continues to enter and absorbs heat and is converted into hot air and is continuously discharged, so as to achieve continuous cooling of the LED explosion-proof lighting lamp. After the LED explosion-proof lighting lamp is cooled, the micro exhaust fan is turned off, and the first circular baffle falls downward to its initial position.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] (1) By setting up a heat dissipation module, first, the micro exhaust fan is turned on to extract relatively low-temperature air in the environment, and the cold air enters the interior of the heat dissipation module from the vent and flows upward, and then pushes the force-bearing plate upward through the cold air flow channel. The force-bearing plate moves upward and drives the first circular baffle to rise upward through the connecting rod. When the air flows upward in the cold air flow channel, it passes through the interior of the temperature-uniform cylinder and the spiral blades. Due to the Bernoulli principle, when the air flows upward and blows through the spiral blades, the spiral blades will drive the temperature-uniform cylinder to start rotating, thereby driving the internal air to rotate together, so that the air of different temperatures inside the temperature-uniform cylinder is fully mixed, thereby achieving uniform distribution of air temperature in the temperature-uniform cylinder and taking away the heat of the cold air flow channel through heat transfer to become hot air flowing out from the top of the cold air flow channel, thereby reducing the temperature of the cold air flow channel. When the temperature of the inert gas outside the cold air flow channel is reduced, these low-temperature inert gases will undergo natural convection with the higher-temperature inert gases to form a closed circulation flow, thereby achieving rapid cooling of the inert gas, and then cooling 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, the piston is pushed upward, and the rising of the piston squeezes the coolant to flow into the first cold pipe and the second cold pipe. Since the first cold pipe and the second cold pipe are close to the protective shell, the coolant cools the inert gas inside the protective shell through the principle of heat conduction, and cools the electrical module through the inert gas, thereby cooling the LED explosion-proof lighting lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

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

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

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

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

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

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

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

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

[0029] In the figure: 1. protective plate; 2. base plate; 3. heat dissipation module; 4. protective shell; 5. electrical module; 6. liquid cooling device;

[0030] 11. Light hole; 12. Exhaust hole; 13. Countersunk screw hole; 21. LED lamp bead; 31. Fan cover; 32. Micro exhaust fan; 33. Cold air flow duct; 34. One-way ventilation assembly; 341. First round baffle; 342. First vent; 343. Connecting rod; 344. Spring; 345. Force plate; 35. Second round baffle; 351. Second vent; 352. Through hole; 36. Vent; 37. Temperature-uniform cylinder; 371. Spiral blade; 41. Heat sink fin; 61. Piston; 62. First cold pipe; 63. Second cold pipe; 64. Vent; 65. Coolant. DETAILED DESCRIPTION

[0031] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. 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.

[0032] refer to Figures 1 to 7 The embodiment of the present invention provides an LED explosion-proof lighting lamp. Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention, as shown in Figures 1 to 3As shown, the LED explosion-proof lighting lamp comprises a protective plate 1, a substrate 2 is threadedly connected above the protective plate 1, a heat dissipation module 3 is fixedly arranged above the substrate 2, a protective shell 4 is fixedly arranged above the heat dissipation module 3, an electrical module 5 is installed inside the protective shell 4, and a liquid cooling device 6 is arranged above the electrical module 5. The protective plate 1 is one of the core components of the lighting lamp, which can provide basic protection functions to prevent external physical impact or chemical corrosion from damaging the interior of the lighting lamp. The substrate 2 is threadedly connected above the protective plate 1. This threaded connection method not only ensures the stability of the structure, but also facilitates disassembly and maintenance when necessary. The heat dissipation module 3 is a key component of the lighting lamp heat dissipation system. Its design purpose is to effectively dissipate the heat generated by the LED lamp during operation, ensure the stable operation of the lighting lamp and extend its service life. The main function of the protective shell 4 is to protect the internal electrical module 5 from interference and damage from the external environment. 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 lighting and operation of the LED lamp. The liquid cooling device 6 is an efficient heat dissipation method, which takes away the heat generated by the electrical module 5 through the circulating liquid, further improving the heat dissipation performance of the lighting lamp. The design of the liquid cooling device 6 not only improves the heat dissipation efficiency, but also helps to maintain a uniform distribution of the temperature inside the lighting lamp, thereby extending the service life of the LED lamp.

[0033] like Figure 1 As shown, the protective plate 1 is evenly provided with a plurality of light holes 11, and each light hole 11 is in the shape of a quadrangular pyramid with a large bottom opening and a small top opening, and the light holes 11 are interconnected, and each light hole 11 is provided with an LED lamp bead 21, and the LED lamp bead 21 is fixedly mounted on the substrate 2, and the LED lamp bead 21 is cast and protected, and the casting meets the requirements of the explosion-proof casting standard, that is, in a net space not larger than 1cm 3 Under the condition that the minimum thickness of the encapsulation compound from the net space to the net space or free surface / bonded non-metallic or metal shell / unbonded non-metallic or metal shell does not exceed 1mm, it can be safely applied to explosion-proof places in Zone 1 and play a role in long-term explosion-proof lighting. The production cost is controllable and the market application prospect is broad. The design of the light hole 11 effectively ensures that the light transmission efficiency of the LED lamp bead 21 light source is not affected. The bottom of the light hole 11 is interconnected to cooperate with the heat dissipation work. During the packaging process, the dispensing packaging process is not hindered, the casting is uniform, and the performance is good.

[0034] like Figures 3 to 6As shown, the heat dissipation module 3 is a square shell-like structure with a hollow interior. A plurality of vents 36 are provided at the bottom of the heat dissipation module 3. A fan cover 31 is provided inside each vent 36. A micro exhaust fan 32 is fixedly installed inside each vent 36 and located above the fan cover 31. The micro exhaust fan 32 is used to extract relatively low-temperature air from the environment, so that the cold air enters the shell-like heat dissipation module 3 through the vents 36. A plurality of cold air flow ducts 33 are evenly penetrated above the heat dissipation module 3. The cold air flow ducts 33 are circular tube structures, and the lower ends of the cold air flow ducts 33 are connected to the heat dissipation module 3. A second circular baffle 35 is glued inside the upper end of each cold air flow duct 33. Four second vents 351 are evenly provided 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 is penetrated in the through hole 352. A first circular baffle 341 is glued to the upper end of the connecting rod 343. Four first vents 342 are evenly arranged on the circular baffle 341, and the second vents 351 and the first vents 342 are staggered. A force-bearing sheet 345 is glued to the lower end of the connecting rod 343, and a spring 344 is sleeved between the second circular baffle 35 and the force-bearing sheet 345 on the connecting rod 343, and the two ends of the spring 344 are respectively glued to the two opposite sides of the second circular baffle 35 and the force-bearing sheet 345 to ensure that the second vents 351 and the first vents 342 are always staggered. The first circular baffle 341, the first vents 342, the connecting rod 343, the spring 344 and the force-bearing sheet 345 together constitute a one-way ventilation assembly 34, and the interior of the cold air flow channel 33 is also rotatably connected to a uniform temperature cylinder 37, and the interior of the uniform temperature cylinder 37 is also evenly provided with a number of spiral leaves 371. The cold air flows upward in the heat dissipation module 3, and then pushes the force-bearing plate 345 upward through the cold air flow channel 33. The force-bearing plate 345 moves upward through the connecting rod 343 to drive the first circular baffle 341 to rise upward. At the same time, 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 upward, thereby shortening the life of the parts. When the cold air flows through the heat dissipation module 3 and the cold air flow channel 33, the heat is absorbed by heat transfer and converted into hot air. After the first circular baffle 341 rises upward, the second circular baffle 35 and the first circular baffle 341 are out of contact, thereby allowing 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 turn.When the air flows upward in the cold air flow duct 33, it passes through the interior of the temperature-uniform cylinder 37 and the spiral blades 371. Due to the Bernoulli principle, when the air flows upward and blows through the spiral blades 371, due to the cross-sectional shape of the spiral blades 371 and the characteristics of the air flow, different pressures are generated above and below the spiral blades 371, that is, a pressure difference is generated below and above the spiral blades 371. This pressure difference will generate an upward lift, so that the spiral blades 371 drive the temperature-uniform cylinder 37 to start rotating. The rotation of the spiral blades 371 and the temperature-uniform cylinder 37 is conducive to driving the internal air to rotate together, forming a complex flow pattern, thereby achieving air mixing. This flow pattern helps to break the temperature stratification and fully mix the air of different temperatures inside the temperature-uniform cylinder 37, thereby achieving uniform distribution of air temperature in the temperature-uniform cylinder 37. The uniform distribution of air temperature in the temperature-uniform cylinder 37 is conducive to taking away the heat of the cold air flow channel 33 through heat transfer and converting it into hot air flowing out from the top of the cold air flow channel 33, thereby reducing the temperature of the cold air flow channel 33. When the temperature of the inert gas outside the cold air flow channel 33 is reduced, these low-temperature inert gases will form a temperature gradient with the higher-temperature inert gas. In the presence of a temperature gradient, natural convection will occur in the internal inert gas, which will cause 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 circulation flow, thereby achieving rapid cooling of the inert gas, and then cooling the LED explosion-proof lighting lamp through heat transfer. The design of the second round baffle 35 and the first round baffle 341 can ensure that no foreign matter falls from above into the cold air flow channel 33 under normal conditions.

[0035] In certain preferred embodiments, Figure 2 and Figure 4 As shown, the liquid cooling device 6 is a square shell-shaped structure with an opening at the lower end, a piston 61 is provided inside the liquid cooling device 6, a plurality of first cooling tubes 62 are connected to the upper parts of the two opposite sides of the liquid cooling device 6, and a plurality of second cooling tubes 63 are connected to the upper parts of the other two opposite sides of the liquid cooling device 6, the first cooling tubes 62 and the second cooling tubes 63 are tightly fitted to the liquid cooling device 6 and the protective shell 4 in sequence and extend to the top of the heat dissipation module 3, and a plurality of ventilation holes 64 are provided on the outer sides of the lower ends of the first cooling tubes 62 and the second cooling tubes 63.

[0036] In certain preferred embodiments, Figure 7 As shown, the interior of the liquid cooling device 6 is located above the piston 61 and stores cooling liquid 65 .

[0037] In some optional embodiments, when the piston 61 is located at the lowermost end of the liquid cooling device 6, that is, the liquid cooling device 6 is filled with the coolant 65, it is necessary to ensure that when the piston 61 is located at the uppermost end of the liquid cooling device 6, the coolant 65 completely flows into the first cooling tube 62 and the second cooling tube 63, and the lower horizontal surface of the coolant 65 is located above the vent 64. Due to the air pressure in the liquid cooling device 6, the coolant 65 will not flow out from the vent 64.

[0038] In certain preferred embodiments, Figure 1 As shown, the protective plate 1 is evenly provided with a plurality of exhaust holes 12 and countersunk screw holes 13. The exhaust holes 12 are conducive to achieving the production requirements of fast curing and uniform full glue, and the countersunk screw holes 13 are used for threaded connection between the protective plate 1 and the substrate 2.

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

[0040] In certain preferred embodiments, Figure 2 As shown, a plurality of heat dissipation fins 41 are provided on the outer side of the protective shell 4. The heat dissipation fins 41 provide more heat radiation area by increasing the surface area of ​​the outer surface of the protective shell 4. This helps to speed up the heat dissipation speed because the heat can be transferred to the surrounding environment faster through a larger area.

[0041] In some optional embodiments, the heat sink fins 41 may be made of metals with 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 (bulk molding compound). Such materials have good insulation, explosion-proof and high-temperature resistance, which not only improves the safety performance of the LED explosion-proof lighting, but also enhances its durability and reliability.

[0043] In certain preferred embodiments, Figure 3As shown, the protective shell 4 is sealed and mounted on the heat dissipation module 3, and the interior of the protective shell 4 is filled with inert gas such as nitrogen or argon. Such 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 serve as an additional safety barrier to reduce the risk of explosion caused by equipment failure, operating errors or external factors, which helps to ensure the safety of personnel and LED explosion-proof lighting, and reduce production accidents and property losses.

[0044] In the above embodiment, when the LED explosion-proof lighting lamp is turned on, a large amount of heat will be emitted due to the low electro-optical conversion efficiency and power loss. 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 rising of the piston 61 squeezes the coolant 65 to flow into the first cold pipe 62 and the second cold pipe 63. Since the first cold pipe 62 and the second cold pipe 63 are close to the protective shell 4, the coolant 65 cools down the inert gas inside the protective shell 4 through the principle of heat conduction, and the inert gas inside the protective shell 4 is cooled by the inert gas. The inert gas cools down the electrical module 5, thereby cooling the LED explosion-proof lighting lamp. When the LED explosion-proof lighting lamp is cooled as a whole, the temperature of the inert gas decreases accordingly, causing the total volume of the inert gas to shrink, and the piston 61 moves downward, thereby causing the coolant 65 to flow back into the liquid cooling device 6 from the first cooling tube 62 and the second cooling tube 63. It is worth noting that when the inert gas has not expanded at room temperature, that is, the initial position of the piston 61 is located at the bottom of the liquid cooling device 6, and a protrusion is provided at the bottom of the liquid cooling device 6 to block the bottom of the piston 61. There is no problem of the piston 61 falling 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 switch of the LED lamp beads 21, temperature detection and electrical control. When it is difficult to effectively cool down the LED explosion-proof lighting by relying solely on the liquid cooling device 6, 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 actual conditions), the electrical module 5 will control the heat dissipation module 3 to exert a heat dissipation effect. First, the micro-exhaust fan 32 is turned on to extract relatively low temperature air in the environment. The cold air enters the interior of the heat dissipation module 3 from the air vent 36 and flows upward, and then pushes the force-bearing plate 345 upward through the cold air flow duct 33. The force-bearing plate 345 moves upward through the connecting rod 343 to drive the first circular baffle 341 to rise upward. When the air flows upward in the cold air flow channel 33, it passes through the interior of the temperature-uniform cylinder 37 and the spiral blade 371. Due to the Bernoulli principle, when the air flows upward and blows through the spiral blade 371, the spiral blade 371 will drive the temperature-uniform cylinder 37 to start rotating, thereby driving the internal air to rotate together, so that the air of different temperatures inside the temperature-uniform cylinder 37 is fully mixed, thereby achieving uniform distribution of air temperature in the temperature-uniform cylinder 37 and taking away the heat of the cold air flow channel 33 through heat transfer to become hot air flowing out from the top of the cold air flow channel 33, thereby reducing the temperature of the cold air flow channel 33. When the temperature of the inert gas outside the cold air flow channel 33 is reduced, these low-temperature inert gases will naturally convect with the inert gas with a higher temperature to form a closed circulation 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 compression of the spring 344 prevents the first round baffle 341 from hitting the second round baffle 35 when it rises upward, thereby shortening the life of the parts. The cold air absorbs heat through heat transfer through the heat dissipation module 3 and the cold air flow duct 33 and is converted into hot air. After the first circular baffle 341 rises upward, air flow 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 in turn to take away the heat. The cold air continues to enter and absorbs heat and is converted into hot air that is continuously discharged, so as to achieve continuous cooling of the LED explosion-proof lighting lamp. After the LED explosion-proof lighting lamp is cooled, the micro exhaust fan 32 is turned off, and the first circular baffle 341 drops downward to its initial position.

[0046] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0047] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions 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: A base plate (2) is threadedly connected above the protective plate (1), a heat dissipation module (3) is fixedly arranged above the base plate (2), a protective shell (4) is fixedly arranged above the heat dissipation module (3), an electrical module (5) is installed inside the protective shell (4), and a liquid cooling device (6) is arranged above the electrical module (5); The protective plate (1) is evenly provided with a plurality of light-through holes (11), and each of the light-through holes (11) is in the shape of a quadrangular pyramid with a large bottom opening and a small top opening. The light-through holes (11) are interconnected, and each of the light-through holes (11) is provided with an LED lamp bead (21). The LED lamp bead (21) is fixedly mounted on the substrate (2), and the LED lamp bead (21) is cast-encapsulated for protection, and the casting meets the requirements of the explosion-proof casting standard; The heat dissipation module (3) is a square shell-shaped structure with a hollow interior. A plurality of vents (36) are provided at the bottom of the heat dissipation module (3). A fan cover (31) is provided inside each of the vents (36). A miniature exhaust fan (32) is fixedly installed inside each of the vents (36) and located above the fan cover (31). A plurality of cold air flow ducts (33) are uniformly provided above the heat dissipation module (3). The cold air flow ducts (33) are round tube structures, and the lower ends of the cold air flow ducts (33) are connected to the heat dissipation module (3). A second circular baffle (35) is glued inside the upper end of each of the cold air flow ducts (33). Four second vents (351) are uniformly provided on the second circular baffle (35). A through hole (352) is provided in the center of the second circular baffle (35). A connecting rod (352) is provided in the through hole (352). 43), a first circular baffle (341) is glued to the upper end of the connecting rod (343), four first vents (342) are evenly arranged on the first circular baffle (341), and the second vents (351) and the first vents (342) are staggered, a force-bearing sheet (345) is glued to the lower end of the connecting rod (343), a spring (344) is sleeved between the second circular baffle (35) and the force-bearing sheet (345) on the connecting rod (343), the first circular baffle (341), the first vent (342), the connecting rod (343), the spring (344) and the force-bearing sheet (345) together constitute a one-way ventilation component (34), and a temperature-uniform cylinder (37) is rotatably connected to the interior of the cold air flow duct (33), and a plurality of spiral leaves (371) are evenly arranged inside the temperature-uniform cylinder (37).

2. The LED explosion-proof lighting lamp according to claim 1, characterized in that: The liquid cooling device (6) is a square shell-shaped structure with an opening at the lower end. A piston (61) is provided inside the liquid cooling device (6). A plurality of first cooling pipes (62) are connected to the upper parts of two opposite sides of the liquid cooling device (6). A plurality of second cooling pipes (63) are connected to the upper parts of two other opposite sides of the liquid cooling device (6). The first cooling pipe (62) and the second cooling pipe (63) are closely attached to the liquid cooling device (6) and the protective shell (4) in sequence and extend to the upper part of the heat dissipation module (3). A plurality of ventilation holes (64) are provided on the outer sides of the lower ends of the first cooling pipe (62) and the second cooling pipe (63).

3. The LED explosion-proof lighting lamp according to claim 2, characterized in that: The liquid cooling device (6) stores cooling liquid (65) inside the liquid cooling device (6) located above the piston (61).

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

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: A plurality of heat dissipation fins (41) are provided on the outer side of the protective shell (4).

7. The LED explosion-proof lighting lamp according to claim 6, characterized in that: The protective plate (1) is made of insulating, explosion-proof and high-temperature resistant materials such as DMC.

8. The LED explosion-proof lighting lamp according to claim 7, characterized in that: The protective shell (4) is sealed and mounted 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.

9. A heat dissipation method for an LED explosion-proof lighting lamp as claimed in any one of claims 1 to 8, characterized in that: include: When the LED explosion-proof lighting lamp is turned on, a large amount of heat will be emitted due to low electro-optical conversion efficiency and power loss. 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) to flow into the first cold pipe (62) and the second cold pipe (63). Since the first cold pipe (62) and the second cold pipe (63) are closely attached to the protective shell (4), the coolant (65) cools the inert gas inside the protective shell (4) through the principle of heat conduction. The temperature of the electrical module (5) is reduced, thereby reducing the temperature of the LED explosion-proof lighting lamp. When the LED explosion-proof lighting lamp is cooled as a whole, 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) from the first cooling tube (62) and the second cooling tube (63). It is worth noting that when the inert gas is not expanded at room temperature, that is, the initial position of the piston (61) is located at the bottom of the liquid cooling device (6), and a protrusion is provided at the bottom of the liquid cooling device (6) to block the bottom of the piston (61). There is no problem of the piston (61) falling 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 it is difficult to effectively cool down the LED explosion-proof lighting only by relying on the liquid cooling device (6), the heat dissipation module (3) plays a heat dissipation role. First, the micro exhaust fan (32) is turned on to extract relatively low-temperature 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 stress-bearing sheet (345) upward through the cold air flow channel (33). The stress-bearing sheet (345) moves upward through the connecting rod (343) to drive the first circular baffle (341) to rise upward. When the air flows in the cold air flow channel (3 3) When the air flows upward, it passes through the interior of the temperature-uniform cylinder (37) and the spiral blades (371). Due to the Bernoulli principle, when the air flows upward and blows through the spiral blades (371), the spiral blades (371) will drive the temperature-uniform cylinder (37) to start rotating, thereby driving the internal air to rotate together, so that the air of different temperatures inside the temperature-uniform cylinder (37) is fully mixed, thereby achieving uniform distribution of air temperature inside the temperature-uniform cylinder (37) and taking away the heat of the cold air flow channel (33) through heat transfer to become hot air and flow out from above the cold air flow channel (33), thereby making the The temperature of the cold air flow channel (33) is reduced. When the temperature of the inert gas outside the cold air flow channel (33) is reduced, the low-temperature inert gas will undergo natural convection with the inert gas at a higher temperature to form a closed circulation 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. The compression of the spring (344) prevents the first circular baffle (341) from colliding with the second circular baffle (35) when it rises upward, thereby shortening the life of the parts. The cold air passes through the heat dissipation module (3) and the cold air flow channel ( 33) heat transfer absorbs heat and converts it into hot air. After the first circular baffle (341) rises upward, air flow 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) in sequence, thereby taking away the heat. Cold air continues to enter and absorbs heat and is converted into hot air and is continuously discharged, so as to achieve continuous cooling of the LED explosion-proof lighting lamp. After the LED explosion-proof lighting lamp is cooled, the micro exhaust fan (32) is turned off, and the first circular baffle (341) drops downward to its initial position.

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