High-power LED underwater lamp

Abstract

The invention belongs to the technical field of illumination, and particularly relates to a high-power LED underwater lamp. Comprising a shell assembly, a light source assembly and a heat dissipation assembly, and the shell assembly comprises an upper shell and a lower shell; the heat dissipation assembly is arranged below the light source assembly and partially located in the lower shell. The heat dissipation assembly comprises an aluminum substrate, a plurality of heat pipes, a heat dissipation plate and heat dissipation fins, and the light source assembly is installed on the aluminum substrate; the heat pipes are embedded in the aluminum substrate, the light source assembly is in contact with the heat pipes, and the heat pipes are radially distributed outwards from the center of the light source assembly; the aluminum substrate is in heat conduction connection with the heat dissipation plate, and the heat dissipation plate is connected with the upper shell to form a closed sealing cavity; the heat dissipation fins are in heat conduction connection with the heat dissipation plate and located on the side, away from the light source assembly, of the heat dissipation plate. The plurality of heat pipes are embedded in the aluminum substrate and are radially distributed by taking the light source assembly as the center, so that heat is quickly and uniformly diffused from a heat source to the periphery, and local overheating is avoided; meanwhile, the aluminum substrate, the heat dissipation plate and the heat dissipation fins form a continuous heat conduction path, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of lighting technology, specifically a high-power LED underwater light. Background Technology

[0002] Underwater lights have wide applications in landscape engineering, aquariums, and underwater operations, providing visibility and decorative effects to the underwater environment through their light source components. Current technology generally employs an LED light source combined with a heat dissipation structure and a waterproof housing. Heat generated on the light source component is transferred to the housing through the heat dissipation structure (such as metal fins), and then dissipated through heat exchange between the housing surface and the external water. However, the waterproof housing, in order to achieve a sealed protection, inherently hinders heat dissipation, especially when dealing with high-power LED light sources, where the heat dissipation problem becomes even more pronounced.

[0003] As the demand for brightness in underwater lighting increases, LED power has developed from tens of watts to hundreds of watts. The heat generated per unit area of ​​high-power light sources increases dramatically. Heat tends to accumulate in the light source installation area and cannot be dissipated quickly, causing the LED chip temperature to rise sharply, which in turn causes light decay, color drift, or even burns out the light source.

[0004] Meanwhile, when the lamp is operating underwater, the heat from the light source causes the air inside the waterproof casing to expand, creating positive pressure; when the lamp is turned off and cools down, the internal air contracts, creating negative pressure. This repeated pressure change can lead to fatigue failure of the sealing structure, causing water to seep in and short-circuit. Although existing vent valve solutions attempt to balance the air pressure, they are prone to stability issues due to pressure accumulation during long-term use, and there are performance risks related to moisture resistance, water vapor prevention, and expansion of the plastic casing, making it difficult to meet the reliability requirements of high-power lamps.

[0005] To address the aforementioned issues, it is necessary to provide an LED underwater light that features high heat dissipation efficiency, reliable sealing, good air pressure balance, and suitability for high power applications. Summary of the Invention

[0006] This invention provides a high-power LED underwater light, which aims to address the issues of insufficient heat dissipation efficiency under high-power operation and the sealing and reliability problems in underwater environments.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a high-power LED underwater light, including a housing assembly, a light source assembly, and a heat dissipation assembly, wherein the housing assembly includes an upper shell and a lower shell; the heat dissipation assembly is disposed below the light source assembly and is at least partially located within the lower shell; wherein the heat dissipation assembly includes an aluminum substrate, multiple heat pipes, a heat sink, and heat dissipation fins, and the light source assembly is mounted on the aluminum substrate; the multiple heat pipes are embedded in the aluminum substrate, and the light source assembly is in contact with the heat pipes, and the multiple heat pipes are radially distributed outward from the center of the light source assembly; the aluminum substrate is thermally connected to the heat sink, and the aluminum substrate is located on the side of the heat sink facing the light source assembly; the heat sink is connected to the upper shell and forms a closed sealed cavity with the upper shell, and the light source assembly is housed in the sealed cavity; the heat dissipation fins are thermally connected to the heat sink and are located on the side of the heat sink away from the light source assembly.

[0008] Furthermore, the upper surface of the aluminum substrate is provided with radial grooves corresponding to the heat pipes, and the heat pipes are embedded in the radial grooves.

[0009] Furthermore, the heat pipes are U-shaped copper pipes, with multiple heat pipes symmetrically arranged on the aluminum substrate, and adjacent heat pipes are in contact with each other for heat conduction.

[0010] Furthermore, the two U-shaped copper tubes in the central area are arranged back to back with their bottoms in contact with each other for heat conduction. The remaining U-shaped copper tubes are arranged in sequence on the outside of the central U-shaped copper tube, and the bottoms of the adjacent U-shaped copper tubes are connected to each other. The multiple U-shaped copper tubes are distributed radially outward.

[0011] Furthermore, the heat sink is made of stainless steel; the heat sink fins are integrally extruded aluminum profile fins, including multiple parallel blades.

[0012] Furthermore, a sealing ring is provided at the connection between the heat sink and the upper shell. The heat sink and the upper shell are fixedly connected by fasteners, and the sealing ring is pressed between the two.

[0013] Furthermore, the upper shell has a tempered glass opening, and a tempered glass sealing ring is fitted around the edge of the tempered glass. A tempered glass pressure plate is located below the tempered glass sealing ring, and the tempered glass pressure plate presses and fixes the tempered glass and the tempered glass sealing ring to the upper shell.

[0014] Furthermore, the side walls and bottom of the lower shell are provided with multiple through holes to allow water to enter the interior of the lower shell and directly contact the heat dissipation fins.

[0015] Furthermore, it also includes an airbag, which is located below the heat dissipation fins. The airbag is sealed to the heat dissipation plate through a waterproof airbag connector, and the airbag is in communication with the internal gas of the upper shell to balance the air pressure in the sealed cavity.

[0016] Furthermore, the airbag is initially in an uninflated state; when the gas inside the sealed cavity is heated and expands, the gas enters the airbag, causing it to inflate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) The high-power LED underwater lamp of the present invention embeds multiple heat pipes in the aluminum substrate and distributes them radially around the light source component, so that heat can be quickly and evenly diffused from the heat source to the surrounding area, effectively avoiding local overheating and ensuring the stability of the light source component operation; at the same time, the aluminum substrate and the heat sink, and the heat sink and the heat sink fins are connected in sequence to form a continuous and efficient heat conduction path, which significantly improves the overall heat dissipation efficiency.

[0019] (2) The high-power LED underwater lamp of the present invention provides radial grooves on the upper surface of the aluminum substrate that correspond one-to-one with the heat pipes, and embeds the heat pipes in the grooves, which ensures the close fit and precise positioning of the heat pipes and the aluminum substrate, effectively increases the contact area between the two, significantly reduces the contact thermal resistance, thereby improving the heat conduction efficiency from the aluminum substrate to the heat pipes, and enabling the heat to be dissipated more quickly and evenly along the heat pipes, further improving the overall performance of the heat dissipation component.

[0020] (3) The high-power LED underwater lamp of the present invention significantly increases the heat dissipation area by setting the heat dissipation fins as integrally extruded aluminum profile fins and including multiple parallel blades; at the same time, the lower shell sidewall and bottom are provided with multiple through holes so that the water can directly contact the heat dissipation fins, and the heat exchange is further enhanced by water convection, which effectively meets the heat dissipation requirements of the high-power LED underwater lamp.

[0021] (4) The high-power LED underwater light of the present invention uses an airbag that is connected to the gas in the sealed cavity. The airbag expands and contracts by the thermal expansion and contraction of the gas, which effectively alleviates the pressure fluctuation in the sealed cavity and solves the problem of sealing failure caused by gas pressure changes in the underwater environment. This significantly improves the reliability and service life of the light in long-term underwater operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the high-power LED underwater light of the present invention;

[0024] Figure 2This is a cross-sectional structural diagram of the high-power LED underwater light of the present invention;

[0025] Figure 3 The figure shows an exploded structural diagram of the high-power LED underwater light of this invention.

[0026] Figure 4 This is an exploded structural diagram of the heat dissipation component in the high-power LED underwater light of the present invention;

[0027] The components are: 1-Housing assembly, 11-Upper shell, 110-Light-transmitting opening, 12-Lower shell, 120-Through hole, 13-Sealing cavity, 14-Sealing ring, 15-Fastener, 16-Tempered glass, 17-Tempered glass sealing ring, 18-Tempered glass pressure plate, 2-Light source assembly, 3-Heat dissipation assembly, 31-Aluminum substrate, 310-Radial groove, 32-Heat pipe, 32a-Central U-shaped tube, 32b-Second layer U-shaped tube, 32c-Third layer U-shaped tube, 32d-Outermost U-shaped tube, 33-Heat dissipation plate, 34-Heat dissipation fins, 4-Airbag, 41-Air duct, 5-Airbag waterproof connector, 6-Signal line, 7-Signal line waterproof connector, 8-Power cord, 9-Power cord waterproof connector, 10-Mounting bracket. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0029] The following is in conjunction with the appendix Figure 1 To be continued Figure 4 The invention will be described in detail with reference to specific embodiments.

[0030] The present invention provides a high-power LED underwater light, including a housing assembly 1, a light source assembly 2 and a heat dissipation assembly 3, wherein the housing assembly 1 includes an upper shell 11 and a lower shell 12; the heat dissipation assembly 3 is disposed below the light source assembly 2 and is at least partially located inside the lower shell 12.

[0031] Specifically, the heat dissipation component 3 includes an aluminum substrate 31, multiple heat pipes 32, a heat sink 33, and heat dissipation fins 34. The light source component 2 is mounted on the upper surface of the aluminum substrate 31. During installation, a high thermal conductivity silicone grease is applied to the contact surface between the two components to fill microscopic gaps, reduce contact thermal resistance, and ensure efficient heat conduction. The multiple heat pipes 32 are embedded in the aluminum substrate 31, and the light source component 2 is in contact with the heat pipes 32. The multiple heat pipes 32 are radially distributed outward from the center of the light source component 2. The aluminum substrate 31 is thermally connected to the heat sink 33, and the aluminum substrate 31 is located on the side of the heat sink 33 facing the light source component 2. The heat sink 33 is connected to the upper shell 11 and forms a closed sealed cavity 13 with the upper shell 11. The light source component 2 is housed in the sealed cavity 13. The heat dissipation fins 34 are thermally connected to the heat sink 33 and are located on the side of the heat sink 33 away from the light source component 2.

[0032] As a preferred embodiment, the housing assembly 1 is made of high-strength engineering plastic (such as polyamide PA or polyphenylene sulfide PPS) or 304 / 316 stainless steel. The upper housing 11 is used to encapsulate the light source assembly 2 and provide a light-emitting surface, while the lower housing 12 is used to accommodate the heat dissipation fins 34. The upper housing 11 and the lower housing 12 are detachably connected by fasteners or snap-fit ​​structures for easy installation and maintenance.

[0033] In this invention, the light source component 2 is a high-power LED light source module, which is the core component that generates heat when the underwater light is working. When the underwater light is working, the heat generated by the light source component 2 during the electro-optical conversion process is conducted along the following path:

[0034] Heat is first conducted to the aluminum substrate 31 through a highly thermally conductive silicone grease layer. The aluminum substrate 31 then conducts the heat along the plane to the heat pipe 32. With the help of the radial layout of the heat pipe 32, the heat is rapidly and evenly diffused in all directions, effectively preventing localized overheating in the light source mounting area. At the same time, the aluminum substrate 31 conducts some heat downwards to the heat sink 33, which then transfers the heat to the heat dissipation fins 34. The heat dissipation fins 34 can indirectly exchange heat with the external water body through the wall of the lower shell 12.

[0035] As a preferred embodiment of this application, the sidewalls and bottom of the lower shell 12 are provided with multiple through holes 120, allowing water to directly enter the interior of the lower shell 12 and contact the heat dissipation fins 34. At this time, the surface of the heat dissipation fins 34 undergoes direct convective heat exchange with the water flowing inside the lower shell 12, and the heat is ultimately absorbed by the water and diffused with the water flow, thereby further improving the heat dissipation performance of the entire LED underwater light.

[0036] This application utilizes a radial heat pipe 32 embedded in the aluminum substrate 31 to simultaneously dissipate heat from the center of the light source assembly 2 in multiple directions, preventing localized overheating of the aluminum substrate 31 and significantly improving the uniformity of heat diffusion and the operational stability of the light source. Simultaneously, the aluminum substrate 31 is thermally connected to the heat sink 33, and the heat sink 33 forms a sealed cavity with the upper shell 11, ensuring the light source assembly 2 is completely in a dry environment, eliminating the risk of short circuits and corrosion caused by moisture penetration. Furthermore, the heat dissipation fins 34 are thermally connected to the heat sink 33, fully utilizing the thermal conductivity of water for efficient heat exchange, ensuring long-term stable operation of the high-power LED underwater. Through the synergistic effect of these two heat conduction paths, this application significantly improves the overall heat dissipation efficiency.

[0037] For details, please refer to Figures 2-4 In some embodiments, the upper surface of the aluminum substrate 31 is provided with radial grooves 310 corresponding to the heat pipes 32, and the heat pipes 32 are embedded in the radial grooves 310.

[0038] In this application, the radial groove 310 refers to a strip-shaped groove, the number of which is equal to the number of heat pipes 32, and distributed radially in a divergent manner, on the same side surface of the aluminum substrate 31 where the light source assembly 2 is mounted, with the mounting position of the light source assembly 2 as the geometric center. The cross-sectional shape of the radial groove 310 can be rectangular, semi-circular, or trapezoidal, and its depth and width are set according to the outer diameter and wall thickness of the heat pipe 32, so that the outer wall of the heat pipe 32 forms surface contact with the side wall and bottom surface of the groove after it is embedded. After the heat pipe 32 is embedded, the radial groove 310 provides axial restraint and circumferential constraint, effectively preventing the heat pipe from shifting, tilting, or rolling before welding and fixing, and ensuring the uniformity and integrity of the connection between the aluminum substrate 31 and the heat pipe 32.

[0039] This application creates radial grooves 310 on the upper surface of the aluminum substrate 31, forming a tight contact between the heat pipe 32 and the aluminum substrate 31, significantly increasing the contact area and reducing the interface thermal resistance. At the same time, the radial grooves 310 constrain the heat pipe 32 axially and circumferentially, enhancing the structural stability of the heat pipe 32 under temperature cycling and mechanical vibration conditions, preventing desoldering or displacement, and ensuring the heat dissipation reliability of the high-power LED underwater light during long-term underwater operation.

[0040] For details, please refer to Figures 3-4 In some embodiments, the heat pipe 32 is a U-shaped copper pipe; multiple heat pipes 32 are symmetrically arranged on the aluminum substrate 31, and adjacent heat pipes 32 are in contact with each other for heat conduction.

[0041] The heat pipe 32 is a heat transfer element with extremely high thermal conductivity, which transfers heat through the evaporation and condensation of liquid within a fully enclosed vacuum tube. In this application, the heat pipe 32 is made of copper. Firstly, copper has excellent thermal conductivity, enabling it to quickly conduct heat from the aluminum substrate 31 along the axial direction of the heat pipe 32 to the distal region. Secondly, copper has good ductility and processing properties, making it easy to bend into the required shape according to heat dissipation needs, and it can closely fit with the radial grooves 310 of the aluminum substrate 31, forming a low thermal resistance contact interface. This U-shaped copper pipe design allows each heat pipe 32 to have two parallel extending heat-conducting arms, increasing the contact length between the heat pipe and the aluminum substrate within a limited space, further improving thermal conductivity.

[0042] In this application, multiple copper heat pipes 32 are radially embedded in the aluminum substrate 31 around the light source assembly 2, forming multiple low-thermal-resistance heat conduction channels. When the high-power LED light source assembly 2 is working, the generated heat is rapidly conducted through the aluminum substrate 31 to each heat pipe 32. The heat pipes 32 utilize their efficient heat transfer characteristics to quickly transfer heat to areas far from the light source, effectively avoiding localized heat accumulation in the light source mounting area and significantly reducing the overall thermal resistance of the lamp.

[0043] For details, please refer to Figures 3-4 In some embodiments, two U-shaped copper tubes located in the central region are arranged back to back with their bottoms in contact with each other for heat conduction. The remaining U-shaped copper tubes are arranged sequentially on the outside of the central U-shaped copper tube, and the bottoms of adjacent U-shaped copper tubes are connected to each other. The multiple U-shaped copper tubes are distributed radially outward.

[0044] In this embodiment, eight tubes are used as an example for illustration, but the number is not limited. Four U-shaped tubes are symmetrically arranged in groups on the aluminum substrate 31. The two U-shaped tubes 32a located in the central region are arranged back-to-back, with their U-shaped bottoms in contact for heat conduction, and extend to both sides to form the main heat channel in the central region. The remaining six U-shaped tubes are arranged sequentially outside the central U-shaped tube, forming a radial layout that expands layer by layer from the center to both sides. Specifically, the innermost central U-shaped tube 32a has the largest outward expansion angle; the bottom of the second-layer U-shaped tube 32b is connected to the bottom of the central U-shaped tube 32a, and the two heat-conducting arms of the second-layer U-shaped tube 32b are located inside the two heat-conducting arms of the central U-shaped tube 32a; the bottom of the third-layer U-shaped tube 32c is connected to the bottom of the second-layer U-shaped tube 32b, and its two heat-conducting arms are located inside the two heat-conducting arms of the second-layer U-shaped tube 32b; the bottom of the outermost U-shaped tube 32d is connected to the bottom of the third-layer U-shaped tube 32c, and its two heat-conducting arms are located inside the two heat-conducting arms of the third-layer U-shaped tube 32c. Through this nested connection method, eight U-shaped tubes form a radial heat-conducting structure on the aluminum substrate 31, expanding layer by layer from the center to both sides, with the heat-conducting arms successively contracting inward. The U-shaped tubes contact each other for heat conduction through the bottom connection points, forming a continuous heat conduction network.

[0045] When the light source assembly 2 is working, the heat generated in the central area is first rapidly dissipated by the two innermost U-shaped tubes 32a, and then transferred layer by layer through the bottom connection to the second layer U-shaped tube 32b, the third layer U-shaped tube 32c, and the outermost U-shaped tube 32d, finally being evenly distributed throughout the entire heat dissipation area. This layered, nested radial layout not only ensures the rapid diffusion of heat from the center to the surrounding areas, but also achieves graded heat conduction through different levels of U-shaped tubes, effectively preventing heat accumulation and significantly improving heat dissipation uniformity and overall heat dissipation efficiency.

[0046] It should be noted that this embodiment uses eight U-shaped copper tubes as an example for description, but the number of U-shaped copper tubes can be adjusted according to the actual power requirements and heat dissipation area. As long as the above-mentioned layer-by-layer nested radial layout is adopted, the technical effect of this application can be achieved.

[0047] For details, please refer to Figures 3-4 In some embodiments, the heat sink 33 is a stainless steel plate; the heat sink fins 34 are integrally extruded aluminum profile fins, including multiple parallel blades.

[0048] The heat sink 33 is made of stainless steel, which has good corrosion resistance and sufficient structural strength, and can withstand the erosion of the underwater environment for a long time without rusting, ensuring the integrity of the sealed cavity 13. At the same time, the stainless steel plate has a high surface flatness, which can form a tight thermally conductive connection with the aluminum substrate 31 and the heat sink fins 34, ensuring smooth heat conduction.

[0049] The heat dissipation fins 34 are made of aluminum, which has the advantages of low processing cost, good thermal conductivity, and light weight. Their parallel-arranged blade structure significantly increases the heat dissipation area, allowing heat to be quickly transferred to the surrounding area. Preferably, the surface of the heat dissipation fins 34 can be coated with an anti-corrosion coating or anodized to form an oxide film, further extending its service life in aquatic environments.

[0050] For details, please refer to Figure 2 In some embodiments, a sealing ring 14 is provided at the connection between the heat sink 33 and the upper shell 11. The heat sink 33 and the upper shell 11 are fixedly connected by fasteners 15, and the sealing ring 14 is pressed between the two.

[0051] In this structure, the sealing ring 14 is preferably made of silicone rubber, which has good water resistance and aging resistance, and can maintain reliable sealing over a long period of time. Under the pressure of the fastener 15, the sealing ring 14 undergoes elastic deformation, tightly filling the joint gap between the heat sink 33 and the upper shell 11, forming a reliable seal and effectively preventing external water from seeping into the sealing cavity 13. The fastener 15 can be a screw, evenly distributed circumferentially along the joint surface to ensure balanced clamping force and avoid localized loosening that could lead to seal failure.

[0052] For details, please refer to Figure 2 In some embodiments, tempered glass 16 is provided at the light-transmitting opening 110 of the upper shell 11. A tempered glass sealing ring 17 is fitted around the edge of the tempered glass 16, and a tempered glass pressure plate 18 is provided below the tempered glass sealing ring 17. The tempered glass pressure plate 18 presses and fixes the tempered glass 16 and the tempered glass sealing ring 17 to the upper shell 11. The tempered glass 16 serves as a light-emitting window and has high light transmittance and good mechanical strength. The tempered glass sealing ring 17 is fitted around the edge of the glass and undergoes elastic deformation under the pressure of the tempered glass pressure plate 18, filling the gap between the tempered glass 16 and the upper shell 11 to form a reliable seal and prevent external water from seeping in through the light-transmitting opening 110. Through the sealing ring 14 at the connection between the heat sink 33 and the upper shell 11 and the tempered glass sealing ring 17 at the light-transmitting opening 110, the two work together to form a stable closed space in the sealing cavity 13, ensuring that the light source assembly 2 can work reliably in the underwater environment for a long time.

[0053] For details, please refer to Figures 2-3 In some embodiments, an airbag 4 is also included. The airbag 4 is disposed below the heat dissipation fins 34. The airbag 4 is sealed to the heat dissipation plate 33 through the airbag waterproof connector 5, and the airbag 4 is in communication with the internal gas of the upper shell 1 to balance the air pressure in the sealed cavity 13.

[0054] In this structure, the airbag 4 serves as a pressure balancing element and can be made of rubber or silicone material to form a flexible, sealed bladder. Its shape can be circular or flat bag-shaped, and the specific form can be set according to the bottom space layout and expansion requirements of the lower shell 12. The volume of the airbag 4 can be matched and designed according to the maximum operating temperature rise of the lamp, the net volume of the sealed cavity, and the target pressure difference range. This embodiment does not limit this, as long as the airbag 4 has sufficient capacity space.

[0055] The airbag waterproof connector 5 is an IP68-rated threaded waterproof connector. One end of it is connected to the heat sink 33 by a threaded fastening to achieve a static seal, and the other end is sealed to the air duct 41 of the airbag 4. The internal channel of the airbag waterproof connector 5 runs through the heat sink 33, so that the cavity of the airbag 4 and the sealed cavity 13 formed by the upper shell 11 maintain gas communication and ensure that the air pressure balance function is properly realized.

[0056] The working principle of the airbag 4 is as follows: When the high-power LED light source component 2 is working, the heat generated causes the gas in the sealed cavity 13 to expand. At this time, the excess gas in the sealed cavity 13 enters the airbag 4 to expand. When the light source component 2 is turned off, the gas in the sealed cavity 13 cools and contracts. The airbag 4 releases the stored gas to replenish the sealed cavity, thereby effectively alleviating the pressure fluctuation in the sealed cavity 13 and avoiding fatigue failure of the sealing structure due to repeated pressure changes.

[0057] For details, please refer to Figure 2 In some embodiments, the airbag 4 is initially in an uninflated state; when the gas in the sealed cavity 13 is heated and expands, the gas enters the airbag 4, causing the airbag 4 to inflate.

[0058] In this application, the airbag 4 is initially in a naturally relaxed, uninflated state, maintaining communication with the gas inside the sealed cavity 13 but without excess gas storage. When the lamp is powered on, the heat generated by the light source assembly 2 causes the gas inside the sealed cavity 13 to increase in temperature and expand in volume. The expanded gas enters the airbag 4 through the waterproof connector 5, causing the airbag 4 to gradually expand, thereby absorbing excess gas volume and alleviating the pressure increase inside the sealed cavity 13. When the lamp is turned off and cooled, the gas inside the sealed cavity contracts as its temperature decreases. The gas stored in the airbag 4 automatically flows back into the sealed cavity under the action of the internal and external pressure difference, and the airbag 4 returns to its uninflated state.

[0059] Through the above working process, the airbag 4 plays a volume compensation role in the thermal expansion and contraction of the gas in the sealed cavity 13, effectively avoiding fatigue failure of the sealing structure caused by pressure fluctuations, and improving the reliability of the entire underwater light in long-term underwater operation.

[0060] In addition, to enable power supply and control of the light source assembly 2, this application also includes a signal line 6 and a power line 8. The signal line 6 and power line 8 are respectively sealed to the heat sink 33 via a waterproof signal line connector 7 and a waterproof power line connector 9, and pass through the heat sink 33 to be electrically connected to the light source assembly 2 inside the sealed cavity 13. Both the waterproof signal line connector 7 and the waterproof power line connector 9 are IP68-rated waterproof connectors, and are statically sealed to the heat sink 33 via threaded fastening, ensuring that water cannot seep into the sealed cavity 13 along the cables.

[0061] As a further embodiment of this application, a mounting bracket 5 may also be provided on the side of the upper shell 11 for fixing the lamp to the underwater installation position. The specific structure of the mounting bracket 5 is conventional technology in the art and will not be described in detail here.

[0062] To verify the heat dissipation effect and air pressure balance performance of this application, a long-term underwater operation test was conducted on a 700W high-power LED underwater light prototype (model PR-6517) using the above-mentioned technical solution. The test conditions were: input voltage DC48V, ambient temperature 25℃, water tank volume of 600 liters, and the light fixture was completely immersed in the water tank. The test results are shown in Table 1.

[0063]

[0064] Test results show that after the LED light source has been running continuously for 336 hours at a power of 700W, the LED light source temperature stabilizes at 60℃, which is lower than the upper limit requirement of 70℃; the water tank temperature rise stabilizes after 24 hours, reaching 36℃, which meets the standard requirement of ≤40℃; the actual maximum expansion volume of the airbag 4 is 200mL, which is lower than its design capacity of 500mL, indicating that the airbag 4 has sufficient margin to cope with air pressure fluctuations under higher power or more severe operating conditions; the interior of the lamp body sealing cavity 13 remains dry, and the sealing performance is reliable.

[0065] It should be noted that the above tests were conducted in a water tank with a limited volume. The water volume in the tank was fixed, and heat gradually accumulated, causing the water temperature to rise. In practical applications, lighting fixtures are typically installed in open bodies of water such as rivers, lakes, and swimming pools, where the water is constantly flowing and renewing, providing better heat dissipation conditions than in a static water tank environment. Therefore, it is reasonable to expect that the technical solution of this application will achieve superior heat dissipation in practical use, effectively supporting the long-term stable operation of LED light sources with power of 500W and above.

[0066] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the nature and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention.

Claims

1. A high-power LED underwater light, characterized in that, include: The housing assembly includes an upper shell and a lower shell; Light source components; A heat dissipation component is disposed below the light source component and is at least partially located within the lower housing; The heat dissipation component includes: An aluminum substrate, on which the light source assembly is mounted; Multiple heat pipes are embedded in the aluminum substrate, and the light source assembly is in contact with the heat pipes. The multiple heat pipes are radially distributed outward from the center of the light source assembly. A heat sink is provided, wherein the aluminum substrate is thermally connected to the heat sink, and the aluminum substrate is located on the side of the heat sink facing the light source assembly; the heat sink is connected to the upper shell and forms a closed sealed cavity with the upper shell, and the light source assembly is housed in the sealed cavity; The heat dissipation fins are thermally connected to the heat dissipation plate and are located on the side of the heat dissipation plate away from the light source assembly.

2. The high-power LED underwater light according to claim 1, characterized in that: The upper surface of the aluminum substrate is provided with radial grooves corresponding to the heat pipes, and the heat pipes are embedded in the radial grooves.

3. The high-power LED underwater light according to claim 2, characterized in that: The heat pipe is a U-shaped copper pipe, and multiple heat pipes are symmetrically arranged on the aluminum substrate, with adjacent heat pipes in contact with each other for heat conduction.

4. The high-power LED underwater light according to claim 3, characterized in that: Two U-shaped copper tubes located in the central area are arranged back to back with their bottoms in contact for heat conduction. The remaining U-shaped copper tubes are arranged sequentially on the outside of the central U-shaped copper tube, and the bottoms of adjacent U-shaped copper tubes are connected to each other. The multiple U-shaped copper tubes are distributed radially outward.

5. The high-power LED underwater light according to claim 1, characterized in that: The heat sink is made of stainless steel; the heat sink fins are integrally extruded aluminum profile fins, including multiple parallel blades.

6. The high-power LED underwater light according to claim 1, characterized in that: A sealing ring is provided at the connection between the heat sink and the upper shell. The heat sink and the upper shell are fixedly connected by fasteners, and the sealing ring is pressed between them.

7. The high-power LED underwater light according to claim 1, characterized in that: The upper shell has a light-transmitting opening with tempered glass, and a tempered glass sealing ring is fitted around the edge of the tempered glass. A tempered glass pressure plate is provided below the tempered glass sealing ring, and the tempered glass pressure plate presses and fixes the tempered glass and the tempered glass sealing ring to the upper shell.

8. The high-power LED underwater light according to claim 1, wherein the side wall and bottom of the lower shell are provided with multiple through holes to allow water to enter the interior of the lower shell and directly contact the heat dissipation fins.

9. The high-power LED underwater light according to claim 1, characterized in that: It also includes an airbag, which is located below the heat dissipation fins. The airbag is sealed to the heat dissipation plate through a waterproof airbag connector, and the airbag is in communication with the internal gas of the upper shell to balance the air pressure in the sealed cavity.

10. The high-power LED underwater light according to claim 9, characterized in that: The airbag is initially in an uninflated state; when the gas in the sealed cavity is heated and expands, the gas enters the airbag, causing the airbag to inflate.

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