Pump-free liquid cooling circulation system special for LED light source

Abstract

The invention discloses a pump-free liquid cooling circulation system special for an LED light source, and relates to the technical field of lamp cooling. The LED lamp comprises a lamp substrate, a heat conduction sealing gasket is arranged at the bottom of the lamp substrate, a lamp heat dissipation body is arranged at the bottom of the heat conduction sealing gasket, and a plurality of LED lamps are fixedly installed at the top of the lamp substrate. The top of the lamp substrate, the top of the heat conduction sealing gasket and the top of the lamp heat dissipation body are provided with a plurality of evenly-distributed substrate assembling holes, a plurality of evenly-distributed sealing gasket assembling holes and a plurality of evenly-distributed heat dissipation body assembling holes respectively. The cooling liquid in the liquid storage pool is promoted to be subjected to continuous circulating phase change through heat concentration, the purpose of efficient heat dissipation is achieved through the huge latent heat capacity of liquid phase change, the cooling effect is guaranteed through the embedded structural design of the liquid storage pool and the circulating groove, external structures such as a power pump and a draught fan do not need to be additionally arranged, and cost is reduced. The lamp substrate, the heat conduction sealing gasket and the lamp radiator are integrated together through the assembly bolts, so that the structure is more compact, and simplification of a cooling system is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of lamp cooling, and in particular to a pumpless liquid cooling circulation system dedicated to an LED light source. Background Art

[0002] During the photoelectric conversion process of LED chips, usually 20% to 30% of electrical energy is converted into heat energy. When the ambient temperature is 25°C, the LED light intensity will decrease by 1% for every 1°C increase in LED temperature. As the LED temperature continues to rise, the structure of the LED will be irreparably damaged, causing the LED to open circuit and eventually burn out. Therefore, long-term accumulated high temperature will lead to reduced performance and life of LED lamps, and the heat dissipation problem of LED lamps must be effectively solved.

[0003] At present, the commonly used heat dissipation methods for LED lamps are air cooling, liquid cooling, shell dielectric cooling, radiation paint treatment, substrate cooling, etc. Among the above heat dissipation methods, although air cooling, liquid cooling and other heat dissipation methods have high heat dissipation efficiency, they require additional power sources and heat dissipation components. The LED lamp itself is bloated and is not suitable for narrow working spaces. Although shell dielectric cooling, radiation paint treatment, substrate cooling and other methods can reduce the size of the lamp, the heat dissipation effect is poor and it is difficult to meet the heat dissipation requirements of high-power LED lamps. For this reason, a pumpless liquid cooling circulation system dedicated to LED light sources is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the currently commonly used heat dissipation methods such as air cooling and liquid cooling have high heat dissipation efficiency but require additional power sources and heat dissipation components, and the LED lamps themselves are bulky and not suitable for narrow working spaces. Although the shell medium heat dissipation, radiation paint treatment, substrate heat dissipation and other methods can reduce the size of the lamps, the heat dissipation effect is poor and it is difficult to meet the heat dissipation requirements of high-power LED lamps. The present invention provides a pumpless liquid cooling circulation system dedicated to LED light sources.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A pumpless liquid cooling circulation system dedicated to an LED light source comprises a lamp substrate, a thermally conductive sealing pad is arranged at the bottom of the lamp substrate, a lamp heat sink is arranged at the bottom of the thermally conductive sealing pad, a plurality of LED lamps are fixedly mounted on the top of the lamp substrate, a plurality of evenly distributed substrate assembly holes, sealing pad assembly holes and heat sink assembly holes are respectively opened on the top of the lamp substrate, the thermally conductive sealing pad and the lamp heat sink, the positions of the plurality of substrate assembly holes, the plurality of sealing pad assembly holes and the plurality of heat sink assembly holes correspond in sequence from top to bottom, a plurality of evenly distributed assembly columns are fixedly mounted on the bottom of the lamp heat sink, and the plurality of assembly columns are respectively connected to a plurality of The heat sink assembly holes are interconnected, and a plurality of assembly bolts are provided on the top of the lamp substrate, and the assembly bolts are matched with the substrate assembly holes, the sealing gasket assembly holes, and the heat sink assembly holes. A plurality of liquid reservoirs are provided on the top of the lamp heat sink, and the positions of the plurality of liquid reservoirs respectively correspond to the positions of the plurality of LED lamps. A plurality of circulation grooves are provided on the top of the lamp heat sink, and the two ends of any one of the circulation grooves are respectively connected with two of the liquid reservoirs. A liquid injection hole is provided at the bottom of the lamp heat sink, and the liquid injection hole is connected with one of the circulation grooves. A plurality of evenly distributed heat dissipation ribs are fixedly installed at the bottom of the lamp heat sink.

[0007] Furthermore, a plurality of fan-shaped grooves are provided at the bottom of the heat sink of the lamp, and liquid guide tubes are fixedly installed inside the fan-shaped grooves. The top ends of the liquid guide tubes extend to the interiors of the plurality of liquid storage tanks respectively, and a metal bellows is fixedly installed at the bottom end of the liquid guide tubes. An adapter is fixedly installed at the bottom end of the metal bellows, and a heat pipe is fixedly installed at one end of the adapter. Hinge plates are fixedly installed on both sides of the liquid guide tube and the metal bellows.

[0008] Furthermore, any one of the heat pipes is located between two of the heat dissipation ribs, a plurality of elastic claws are fixedly mounted on the bottom of the lamp heat sink, and the plurality of heat pipes are respectively clamped inside the plurality of elastic claws.

[0009] Furthermore, a protective slide plate is provided at the bottom of each of the plurality of heat pipes, and any one of the protective slide plates is slidably mounted at the bottom of two of the heat dissipation ribs.

[0010] Furthermore, an upper fixed leak plate is fixedly installed inside the liquid guide tube, and a lower rotating leak plate is rotatably installed inside the liquid guide tube, the lower rotating leak plate is located at the bottom of the upper fixed leak plate and fits with the upper fixed leak plate, the top of the upper fixed leak plate and the lower rotating leak plate are both provided with a plurality of leak holes evenly distributed along the axis of the liquid guide tube, an arc-shaped sliding hole is provided on one side of the liquid guide tube, a switch lever is fixedly installed on the side wall of the lower rotating leak plate, and one end of the switch lever passes through the arc-shaped sliding hole and extends to the inside of the fan-shaped groove.

[0011] Furthermore, a plurality of heat-conducting plug plates are fixedly mounted on the bottom of the heat-conducting sealing pad, and the plurality of heat-conducting plug plates are respectively matched with the plurality of liquid storage tanks.

[0012] Furthermore, a plurality of heat-insulating strips are fixedly mounted on the bottom of the heat-conductive sealing pad, and the plurality of heat-insulating strips are respectively matched with the plurality of circulation grooves.

[0013] Furthermore, a sealing threaded tube is fixedly installed on the bottom of the lamp heat sink, and the sealing threaded tube is connected to the liquid injection hole. A sealing cover is screwed on the bottom end of the sealing threaded tube, and a sealing rod matched with the liquid injection hole is fixedly installed inside the sealing cover, and the sealing rod is inserted into the inside of the liquid injection hole.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention promotes the continuous circulation phase change of the coolant in the liquid storage tank by heat concentration, and utilizes the huge latent heat capacity of the liquid phase change to achieve the purpose of efficient heat dissipation. The embedded structural design of the liquid storage tank and the circulation tank not only ensures the cooling effect, but also does not require the addition of external structures such as power pumps and fans. The lamp base plate, thermal conductive sealing pad and lamp heat sink are integrated together by assembling bolts, making the structure more compact and ensuring the simplicity of the cooling system;

[0016] 2. The present invention arranges a heat pipe so that part of the cooling liquid expanded by heat is sequentially transported to the heat pipe through the liquid guide pipe, the metal bellows and the adapter. Since the liquid guide pipe, the metal bellows, the adapter and the heat pipe are all capillaries, and one end of the heat pipe is in the shape of a water drop, the cooling liquid inside the heat pipe is heated and vaporized, and then flows to the low-temperature end of the heat pipe and cools down and liquefies, and then flows back to the inside of the liquid reservoir under the action of the capillary effect, thus realizing the second phase change circulation path of the cooling liquid and improving the circulation speed and cooling effect of the cooling liquid inside the liquid reservoir;

[0017] 3. The present invention provides an elastic clamping claw, so that if the working space of the current LED light source is small, the hinged plate and the metal bellows can be bent to bend the adapter and the heat pipe toward the location of the heat dissipation ribs, and the elastic clamping claw is used to clamp the heat pipe so that the heat pipe is stored between the two heat dissipation ribs, so that the heat pipe does not occupy much space while continuing to perform the phase change circulation of the coolant, thereby making the structure of the cooling circulation system more compact. If the working space is sufficient, the heat pipe can be unfolded to obtain a better heat dissipation effect;

[0018] 4. The present invention provides a protective slide plate, so that after the heat pipe is stored between the two heat dissipation ribs, the protective slide plates at various locations can be slid to move to the bottom of one end of each heat pipe, so that the protective slide plate can assist in the fixed storage of the heat pipe, and at the same time, the protective slide plate can protect the water drop-shaped end of the heat pipe to reduce the influence of external factors;

[0019] 5. The present invention provides an upper fixed leak plate and a lower rotating leak plate, so that when the second coolant phase change circulation path is not needed, the switch lever inside the fan-shaped groove can be rotated to slide inside the arc-shaped sliding hole, and drive the lower rotating leak plate to rotate inside the liquid guide tube, so that the multiple leak holes on the lower rotating leak plate are misaligned with the leak holes on the upper fixed leak plate, so that the upper fixed leak plate and the lower rotating leak plate seal the top of the liquid guide tube, close the second circulation path, and realize the selection and control of the coolant phase change circulation path;

[0020] 6. The present invention provides a heat-conducting plug plate, so that when the lamp base plate, the heat-conducting sealing pad and the lamp heat sink are assembled together by using assembly bolts, each heat-conducting plug plate at the bottom of the heat-conducting sealing pad will be plugged into a plurality of liquid reservoirs respectively, so that the heat-conducting plug plate seals the top of the liquid reservoir, thereby improving the external sealing of the liquid reservoir and improving the speed of heat conduction between the heat-conducting sealing pad and the coolant;

[0021] 7. The present invention provides a heat-insulating strip so that the heat-insulating strip can be plugged into the top of the circulation tank for sealing, and reduces the heat conduction between the circulation tank and the heat-conducting sealing pad, so that the inside of the circulation tank is kept at a low temperature, which is beneficial to the temperature-lowering phase change of the gasified coolant;

[0022] 8. The present invention provides a sealing cover so that coolant can be injected into the circulation tank through the injection hole, thereby adding coolant to the reservoir for the first time or replenishing it midway. After the injection is completed, the sealing cover can be screwed to the bottom end of the sealing threaded tube to seal it and prevent leakage. At the same time, the sealing rod inside the sealing cover will penetrate the sealing threaded tube and be inserted into the injection hole to seal the injection hole, thereby preventing the coolant from flowing into the injection hole and affecting the circulation phase change process of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0024] Figure 2 is a schematic diagram of a three-dimensional structure from a second viewing angle of the present invention;

[0025] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the lamp substrate of the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the heat-conducting sealing pad of the present invention;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the heat sink of the lamp of the present invention from the first viewing angle;

[0029] Figure 7 is a schematic diagram of the three-dimensional structure of the heat sink of the lamp of the present invention from a second viewing angle;

[0030] Figure 8 The present invention Figure 7 Schematic diagram of the structure at A in the middle;

[0031] Fig. 9 It is a schematic diagram of the internal three-dimensional structure of the liquid catheter of the present invention;

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of the blocking cover and the blocking rod of the present invention;

[0033] Figure numerals: 1. lamp substrate; 101. substrate assembly hole; 2. thermal conductive sealing pad; 201. sealing pad assembly hole; 3. lamp heat sink; 301. heat sink assembly hole; 302. liquid reservoir; 303. circulation groove; 304. liquid injection hole; 305. fan-shaped groove; 4. LED lamp; 5. assembly column; 6. assembly bolt; 7. heat dissipation rib; 8. liquid guide tube; 801. arc-shaped sliding hole; 9. metal bellows; 10. adapter; 11. heat pipe; 12. hinged plate; 13. elastic claw; 14. protective slide plate; 15. upper fixed leak plate; 16. lower rotating leak plate; 17. leak hole; 18. switch lever; 19. thermal conductive plug plate; 20. thermal insulation strip; 21. sealing threaded tube; 22. sealing cover; 23. sealing rod. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0036] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] like Figures 1 to 10 As shown, a pumpless liquid cooling circulation system dedicated to LED light sources includes a lamp substrate 1, such as Figure 3 As shown, a heat-conducting sealing pad 2 is disposed at the bottom of the lamp substrate 1, and a lamp heat sink 3 is disposed at the bottom of the heat-conducting sealing pad 2. Figure 1 As shown, a plurality of LED lamps 4 are fixedly mounted on the top of the lamp substrate 1. Figure 4 , Figure 5 , Figure 6 As shown, the tops of the lamp substrate 1, the thermally conductive sealing pad 2 and the lamp radiator 3 are respectively provided with a plurality of evenly distributed substrate mounting holes 101, a sealing pad mounting hole 201 and a radiator mounting hole 301, and the positions of the plurality of substrate mounting holes 101, the plurality of sealing pad mounting holes 201 and the plurality of radiator mounting holes 301 correspond in sequence from top to bottom, as shown in FIG. Figure 7 As shown, a plurality of evenly distributed assembly columns 5 are fixedly mounted on the bottom of the lamp heat sink 3, and the plurality of assembly columns 5 are respectively connected to a plurality of heat sink assembly holes 301, as shown in FIG. Figure 3 As shown, a plurality of mounting bolts 6 are arranged on the top of the lamp substrate 1, and the mounting bolts 6 are matched with the substrate mounting holes 101, the sealing gasket mounting holes 201, and the heat sink mounting holes 301, as shown in FIG. Figure 6As shown, a plurality of liquid reservoirs 302 are provided on the top of the lamp radiator 3, and the positions of the plurality of liquid reservoirs 302 correspond to the positions of the plurality of LED lamps 4, respectively. A plurality of circulation grooves 303 are provided on the top of the lamp radiator 3, and the two ends of any one of the circulation grooves 303 are respectively connected to two of the liquid reservoirs 302, and a liquid injection hole 304 is provided on the bottom of the lamp radiator 3, and the liquid injection hole 304 is connected to one of the circulation grooves 303, as shown in FIG. Figure 7 As shown, a plurality of evenly distributed heat dissipation ribs 7 are fixedly installed at the bottom of the lamp heat sink 3; specifically, when the pumpless liquid cooling circulation system dedicated to LED light sources is in use, the heat generated by the operation of the plurality of LED lamps 4 on the lamp substrate 1 will be directly transferred to the lamp heat sink 3 via the lamp substrate 1 and the thermally conductive sealing pad 2, thereby heating up the plurality of liquid reservoirs 302 inside the lamp heat sink 3. Since the positions of the liquid reservoirs 302 correspond to the LED lamps 4, the positions of the respective liquid reservoirs 302 are the highest heat points of the lamp heat sink 3, so that the volume of the coolant in the liquid reservoirs 302 expands after being heated, and a phase change phenomenon occurs at the same time. After part of the coolant is vaporized, it carries the heat in the direction of the circulation groove 303. The coolant changes phase from a gaseous state to a liquid state and flows back into the liquid reservoir 302, thereby concentrating heat to cause the coolant in the liquid reservoir 302 to continuously circulate and change phases, and utilizes the huge latent heat capacity of the liquid phase change to achieve the purpose of efficient heat dissipation. The liquid reservoir 302 and the circulation groove 303 are designed with an embedded structure. The liquid reservoir 302 corresponds to a heat source such as an LED lamp 4, and a plurality of circulation grooves 303 are arranged around the heat source, which not only ensures the cooling effect, but also does not require the addition of external structures such as a power pump and a fan. The lamp substrate 1, the thermal conductive sealing pad 2 and the lamp heat sink 3 are integrated together by assembling bolts 6 to make the structure more compact and ensure the simplicity of the cooling system.

[0039] like Figure 7 As shown, a plurality of fan-shaped grooves 305 are provided at the bottom of the lamp heat sink 3. Figure 8 As shown, the inner part of the fan-shaped groove 305 is fixedly installed with a liquid guide tube 8. Figure 6 As shown, the top ends of the plurality of liquid guide tubes 8 extend to the interior of the plurality of liquid reservoirs 302, respectively. Fig. 9As shown, the bottom end of the liquid guide tube 8 is fixedly installed with a metal bellows 9, the bottom end of the metal bellows 9 is fixedly installed with an adapter 10, and one end of the adapter 10 is fixedly installed with a heat pipe 11. In this embodiment, the liquid guide tube 8, the metal bellows 9, the adapter 10 and the heat pipe 11 are all capillaries, and the end of the heat pipe 11 away from the adapter 10 is in a water drop shape, and both sides of the liquid guide tube 8 and the metal bellows 9 are fixedly installed with hinged plates 12; specifically, by arranging the heat pipe 11, during the operation of the LED lamp 4, the inside of the liquid reservoir 302 is heated The expanded part of the coolant will be transported to the heat pipe 11 through the liquid conduit 8, the metal bellows 9 and the adapter 10 in sequence. Since the liquid conduit 8, the metal bellows 9, the adapter 10 and the heat pipe 11 are all capillaries, and one end of the heat pipe 11 is in the shape of a water droplet, the coolant inside will be heated and vaporized inside the heat pipe 11, and will surge to the low-temperature end of the heat pipe 11 and cool down and liquefy, and then flow back to the interior of the liquid reservoir 302 under the action of the capillary effect, thereby realizing the second phase change circulation path of the coolant, thereby improving the circulation speed and cooling effect of the coolant inside the liquid reservoir 302.

[0040] like Figure 8 As shown, any heat pipe 11 is located between two of the heat dissipation ribs 7, and a plurality of elastic claws 13 are fixedly installed on the bottom of the lamp heat dissipation body 3, and the plurality of heat pipes 11 are respectively clamped inside the plurality of elastic claws 13; specifically, by setting the elastic claws 13, if the working space of the current LED light source is small, the hinge plate 12 and the metal bellows 9 can be bent, so that the adapter 10 and the heat pipe 11 are bent toward the position where the heat dissipation ribs 7 are located, and the elastic claws 13 are used to clamp the heat pipe 11, so that the heat pipe 11 is stored between the two heat dissipation ribs 7, so that the heat pipe 11 will not occupy much space while continuing to perform the phase change circulation of the coolant, thereby making the structure of the cooling circulation system more compact, and if the working space is sufficient, the heat pipe 11 can be unfolded to obtain a better heat dissipation effect.

[0041] like Figure 8 As shown, a protective slide plate 14 is provided at the bottom of each of the plurality of heat pipes 11, and any one of the protective slide plates 14 is slidably installed at the bottom of two of the heat dissipation ribs 7; specifically, by providing the protective slide plate 14, after the heat pipe 11 is received between the two heat dissipation ribs 7, the protective slide plates 14 at various locations can be slid to be moved to the bottom of one end of each heat pipe 11, so that the protective slide plate 14 can play an auxiliary role in the fixed storage of the heat pipe 11, and at the same time, the protective slide plate 14 can protect the teardrop-shaped end of the heat pipe 11 to reduce the influence of external factors.

[0042] like Fig. 9As shown, an upper fixed leak plate 15 is fixedly installed inside the liquid conduit 8, and a lower rotating leak plate 16 is rotatably installed inside the liquid conduit 8. The lower rotating leak plate 16 is located at the bottom of the upper fixed leak plate 15 and fits with the upper fixed leak plate 15. The tops of the upper fixed leak plate 15 and the lower rotating leak plate 16 are both provided with a plurality of leak holes 17 evenly distributed along the axis of the liquid conduit 8. An arc-shaped sliding hole 801 is provided on one side of the liquid conduit 8. A switch lever 18 is fixedly installed on the side wall of the lower rotating leak plate 16, as shown in FIG. Figure 8 As shown, one end of the switch lever 18 passes through the arc-shaped sliding hole 801 and extends to the interior of the fan-shaped groove 305; specifically, by providing an upper fixed leak plate 15 and a lower rotating leak plate 16, when the second coolant phase change circulation path is not needed, the switch lever 18 inside the fan-shaped groove 305 can be rotated to slide inside the arc-shaped sliding hole 801, and drive the lower rotating leak plate 16 to rotate inside the liquid guide tube 8, thereby causing the multiple leak holes 17 on the lower rotating leak plate 16 to be misaligned with the leak holes 17 on the upper fixed leak plate 15, so that the upper fixed leak plate 15 and the lower rotating leak plate 16 seal the top end of the liquid guide tube 8, close the second circulation path, and realize the selection and control of the coolant phase change circulation path.

[0043] like Figure 5 As shown, a plurality of heat-conducting plug plates 19 are fixedly installed at the bottom of the thermally conductive sealing pad 2, and the plurality of heat-conducting plug plates 19 are respectively adapted to a plurality of liquid reservoirs 302. In the present embodiment, the lamp heat sink 3 and the heat-conducting plug plates 19 are both heat-conducting gaskets made of elastic material; specifically, by providing the heat-conducting plug plates 19, when the lamp substrate 1, the heat-conducting sealing pad 2 and the lamp heat sink 3 are assembled together by means of the assembly bolts 6, the heat-conducting plug plates 19 at the bottom of the thermally conductive sealing pad 2 will be respectively inserted into the plurality of liquid reservoirs 302, so that the heat-conducting plug plates 19 seal the top of the liquid reservoir 302, thereby improving the external sealing of the liquid reservoir 302 and improving the speed of heat conduction between the thermally conductive sealing pad 2 and the coolant.

[0044] like Figure 5 As shown, a plurality of thermal insulation strips 20 are fixedly installed on the bottom of the thermally conductive sealing pad 2, and the plurality of thermal insulation strips 20 are respectively matched with the plurality of circulation grooves 303. In the present embodiment, the thermal insulation strips 20 are made of thermal insulation elastic material; specifically, by arranging the thermal insulation strips 20, the thermal insulation strips 20 can be plugged into the top of the circulation groove 303 for sealing, and reduce the heat conduction between the circulation groove 303 and the thermally conductive sealing pad 2, so that the inside of the circulation groove 303 is maintained at a low temperature, which is beneficial to the cooling phase change of the vaporized coolant.

[0045] like Figure 7 As shown, a plugging threaded tube 21 is fixedly installed at the bottom of the lamp heat sink 3, the plugging threaded tube 21 is connected to the injection hole 304, and a plugging cap 22 is screwed to the bottom end of the plugging threaded tube 21. Fig.10As shown, a blocking rod 23 adapted to the injection hole 304 is fixedly installed inside the blocking cover 22, and the blocking rod 23 is inserted into the inside of the injection hole 304; specifically, by setting the blocking cover 22, the injection hole 304 can be used to inject coolant into the circulation groove 303, so as to add coolant to the reservoir 302 for the first time or replenish it midway. When the injection is completed, the blocking cover 22 can be screwed to the bottom end of the blocking threaded tube 21 to seal it to prevent leakage. At the same time, the blocking rod 23 inside the blocking cover 22 will penetrate the blocking threaded tube 21 and be inserted into the injection hole 304 to block the injection hole 304, thereby preventing the coolant from flowing into the injection hole 304 and affecting the circulation phase change process of the coolant.

[0046] In summary: when the pumpless liquid cooling circulation system dedicated to LED light sources is in use, the heat generated by the operation of the multiple LED lamps 4 on the lamp substrate 1 will be directly conducted to the lamp heat sink 3 through the lamp substrate 1 and the thermally conductive sealing pad 2, thereby heating up the multiple liquid reservoirs 302 inside the lamp heat sink 3. Since the positions of the liquid reservoirs 302 correspond to the LED lamps 4, the positions of the liquid reservoirs 302 are the highest points of heat in the lamp heat sink 3, so that the volume of the coolant in the liquid reservoir 302 expands after being heated, and a phase change phenomenon occurs at the same time. After part of the coolant is vaporized, it moves along the direction of the circulation groove 303 carrying the heat until it reaches the edge where the heat is dissipated and the temperature gradually drops. The coolant changes from a vaporized state to a liquid state and flows back into the liquid reservoir 30 2, thereby the coolant in the liquid reservoir 302 is caused to circulate and change phase continuously through heat concentration, and the huge latent heat capacity of the liquid phase change is used to achieve the purpose of efficient heat dissipation. The embedded structural design of the liquid reservoir 302 and the circulation groove 303 not only ensures the cooling effect, but also does not need to add external structures such as power pumps and fans. The lamp substrate 1, the thermal conductive sealing pad 2 and the lamp heat sink 3 are integrated together by assembling bolts 6, so that the structure is more compact and the simplicity of the cooling system is ensured. By setting the heat pipe 11, during the operation of the LED lamp 4, part of the coolant in the liquid reservoir 302 that is heated and expanded will be transported to the heat pipe 11 in turn through the liquid guide pipe 8, the metal bellows 9 and the adapter 10. 11 are all capillaries, and one end of the heat pipe 11 is in the shape of a water drop, so that after the internal coolant is heated and vaporized inside the heat pipe 11, it will surge to the low-temperature end of the heat pipe 11 and cool down and liquefy, and then flow back to the inside of the reservoir 302 under the action of the capillary effect, realizing the second phase change circulation path of the coolant, improving the circulation speed and cooling effect of the coolant inside the reservoir 302, and by setting the elastic claw 13, if the current working space of the LED light source is small, the hinge plate 12 and the metal bellows 9 can be bent, so that the adapter 10 and the heat pipe 11 are bent toward the position where the heat dissipation rib 7 is located, and the elastic claw 13 is used to clamp the heat pipe 11, so that the heat pipe 11 is stored between the two heat dissipation ribs 7, so that the heat pipe 11 continues to perform the phase change circulation of the coolant. While working, it will not occupy much space, so that the structure of the cooling circulation system is more compact. If the working space is sufficient, the heat pipe 11 can be unfolded to obtain a better heat dissipation effect. By setting the protective slide plate 14, after the heat pipe 11 is put between the two heat dissipation ribs 7, the protective slide plates 14 at various places can be slid to move to the bottom of one end of each heat pipe 11, so that the protective slide plate 14 can play an auxiliary role in the fixed storage of the heat pipe 11. At the same time, the protective slide plate 14 can protect the water drop-shaped end of the heat pipe 11 to reduce the influence of external factors. By setting the upper fixed leak plate 15 and the lower rotating leak plate 16, when the second coolant phase change circulation path is not needed, the switch lever 18 inside the fan-shaped groove 305 can be rotated.It is made to slide inside the arc-shaped sliding hole 801, and drives the lower rotating leak plate 16 to rotate inside the liquid guiding tube 8, thereby causing the multiple leak holes 17 on the lower rotating leak plate 16 to be misaligned with the leak holes 17 on the upper fixed leak plate 15, so that the upper fixed leak plate 15 and the lower rotating leak plate 16 seal the top of the liquid guiding tube 8, close the second circulation path, and realize the selection and control of the phase change circulation path of the coolant. By setting the heat-conducting plug plate 19, when the lamp substrate 1, the heat-conducting sealing pad 2 and the lamp heat sink 3 are assembled together by using the assembly bolts 6, the heat-conducting plug plates 19 at the bottom of the heat-conducting sealing pad 2 will be respectively inserted into the multiple liquid reservoirs 302, so that the heat-conducting plug plate 19 seals the top of the liquid reservoir 302, improves the external sealing of the liquid reservoir 302, and increases the speed of heat conduction between the heat-conducting sealing pad 2 and the coolant. By setting the heat insulation strip 20, the heat insulation strip 20 can be plugged into the top of the circulation groove 303 for sealing, and reduce the heat conduction between the circulation groove 303 and the heat conductive sealing pad 2, so that the inside of the circulation groove 303 maintains a low temperature state, which is beneficial to the cooling phase change of the gasified coolant. By setting the blocking cover 22, the coolant can be injected into the circulation groove 303 through the injection hole 304, so as to add the coolant to the reservoir 302 for the first time or replenish it midway. When the injection is completed, the blocking cover 22 can be screwed to the bottom end of the blocking threaded tube 21 to seal it to prevent leakage. At the same time, the blocking rod 23 inside the blocking cover 22 will penetrate the blocking threaded tube 21 and be plugged into the injection hole 304 to block the injection hole 304, thereby preventing the coolant from flowing into the injection hole 304 and affecting the circulation phase change process of the coolant.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A pumpless liquid cooling circulation system for LED light sources, characterized in that: The invention comprises a lamp substrate (1), wherein a heat-conductive sealing pad (2) is arranged at the bottom of the lamp substrate (1), a lamp heat sink (3) is arranged at the bottom of the heat-conductive sealing pad (2), a plurality of LED lamps (4) are fixedly mounted on the top of the lamp substrate (1), a plurality of evenly distributed substrate assembly holes (101), sealing pad assembly holes (201) and heat sink assembly holes (301) are respectively opened on the top of the lamp substrate (1), the heat-conductive sealing pad (2) and the lamp heat sink (3), wherein the positions of the plurality of substrate assembly holes (101), the plurality of sealing pad assembly holes (201) and the plurality of heat sink assembly holes (301) correspond in sequence from top to bottom, a plurality of evenly distributed assembly columns (5) are fixedly mounted on the bottom of the lamp heat sink (3), the plurality of assembly columns (5) are respectively connected to the plurality of heat sink assembly holes (301), and the plurality of assembly columns (5) are respectively connected to the plurality of heat sink assembly holes (301). A plurality of assembly bolts (6) are arranged on the top of the lamp base plate (1), and the assembly bolts (6) are matched with the base plate assembly holes (101), the sealing gasket assembly holes (201), and the heat sink assembly holes (301). A plurality of liquid reservoirs (302) are arranged on the top of the lamp heat sink (3), and the positions of the plurality of liquid reservoirs (302) respectively correspond to the positions of the plurality of LED lamps (4). A plurality of circulation grooves (303) are arranged on the top of the lamp heat sink (3), and the two ends of any one of the circulation grooves (303) are respectively connected to two of the liquid reservoirs (302). A liquid injection hole (304) is arranged on the bottom of the lamp heat sink (3), and the liquid injection hole (304) is connected to one of the circulation grooves (303). A plurality of evenly distributed heat dissipation ribs (7) are fixedly installed on the bottom of the lamp heat sink (3).

2. The pumpless liquid cooling circulation system for LED light source according to claim 1, characterized in that: The bottom of the lamp heat sink (3) is provided with a plurality of fan-shaped grooves (305), the interior of each of the fan-shaped grooves (305) is fixedly provided with a liquid guide tube (8), the top ends of each of the liquid guide tubes (8) respectively extend to the interior of each of the liquid storage tanks (302), the bottom ends of each of the liquid guide tubes (8) are fixedly provided with a metal bellows (9), the bottom ends of each of the metal bellows (9) are fixedly provided with an adapter (10), one end of each of the adapters (10) is fixedly provided with a heat pipe (11), and hinge plates (12) are fixedly provided on both sides of each of the liquid guide tubes (8) and the metal bellows (9).

3. A pumpless liquid cooling circulation system for LED light source according to claim 2, characterized in that: Any one of the heat pipes (11) is located between two of the heat dissipation ribs (7); a plurality of elastic claws (13) are fixedly mounted on the bottom of the lamp heat sink (3); and the plurality of heat pipes (11) are respectively clamped inside the plurality of elastic claws (13).

4. The pumpless liquid cooling circulation system for LED light source according to claim 2, characterized in that: A protective slide plate (14) is provided at the bottom of each of the plurality of heat pipes (11), and any one of the protective slide plates (14) is slidably mounted at the bottom of two of the heat dissipation ribs (7).

5. The pumpless liquid cooling circulation system for LED light source according to claim 2, characterized in that: An upper fixed leaking plate (15) is fixedly installed inside the liquid guiding tube (8), and a lower rotating leaking plate (16) is rotatably installed inside the liquid guiding tube (8). The lower rotating leaking plate (16) is located at the bottom of the upper fixed leaking plate (15) and is in contact with the upper fixed leaking plate (15). The tops of the upper fixed leaking plate (15) and the lower rotating leaking plate (16) are both provided with a plurality of leaking holes (17) evenly distributed along the axis of the liquid guiding tube (8). An arc-shaped sliding hole (801) is provided on one side of the liquid guiding tube (8). A switch lever (18) is fixedly installed on the side wall of the lower rotating leaking plate (16), and one end of the switch lever (18) passes through the arc-shaped sliding hole (801) and extends to the inside of the fan-shaped groove (305).

6. The pumpless liquid cooling circulation system for LED light source according to claim 1, characterized in that: A plurality of heat-conducting plug plates (19) are fixedly mounted on the bottom of the heat-conducting sealing pad (2), and the plurality of heat-conducting plug plates (19) are respectively adapted to the plurality of liquid storage tanks (302).

7. The pumpless liquid cooling circulation system for LED light source according to claim 1, characterized in that: A plurality of heat-insulating strips (20) are fixedly mounted on the bottom of the heat-conducting sealing pad (2), and the plurality of heat-insulating strips (20) are respectively matched with the plurality of circulation grooves (303).

8. The pumpless liquid cooling circulation system for LED light source according to claim 1, characterized in that: A sealing threaded tube (21) is fixedly mounted on the bottom of the lamp heat sink (3); the sealing threaded tube (21) is connected to the liquid injection hole (304); a sealing cover (22) is screwed to the bottom end of the sealing threaded tube (21); a sealing plug rod (23) adapted to the liquid injection hole (304) is fixedly mounted inside the sealing cover (22); and the sealing plug rod (23) is inserted into the inside of the liquid injection hole (304).

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