A lighting device

Abstract

The present application discloses a lighting device, comprising: a base; a lamp tube, mounted on the base; a heat absorbing tube, arranged inside the lamp tube, wherein a heat absorbing cavity for phase change material to flow is formed inside the heat absorbing tube; a condenser tube, arranged outside the lamp tube and connected to the heat absorbing tube; and a light-emitting member, attached to the surface of the heat absorbing tube. The heat absorbing tube of the lighting device of the present application is located inside the lamp tube, and the condenser tube is located outside the lamp tube, which is beneficial to the heat dissipation of the condenser tube and improves the heat dissipation efficiency. Since the lighting device of the present application has high heat dissipation efficiency, the lighting device can be installed without modifying the existing lamp structure, which is conducive to large-scale promotion and use.

Description

Technical Field

[0001] The present application belongs to the field of lighting technology, and specifically relates to a lighting device. Background Art

[0002] LED lamps are lighting fixtures that use LED as a light source. They are suitable for lighting in public places and homes. They are more energy-efficient and have a longer service life than traditional light sources. Currently, high-power LED lamps are widely used.

[0003] High-power LED lamps generate a lot of heat. When high-power LED lamps are used to replace traditional light sources, the heat dissipation effect of existing lighting devices cannot match that of high-power LED lamps. Summary of the invention

[0004] The present application provides a lighting device to solve the heat dissipation problem of using an LED light source for lighting.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: a lighting device, comprising: a base; a lamp tube installed on the base; a heat absorption tube arranged in the lamp tube, and a heat absorption cavity for phase change material to flow is formed inside the heat absorption tube; a condenser tube is arranged outside the lamp tube and connected to the heat absorption tube; and a light-emitting member is attached to the surface of the heat absorption tube.

[0006] According to one embodiment of the present application, it includes: a liquid inlet pipe connected to the first tube end of the heat absorption tube, the first tube end is arranged close to the base, the liquid inlet pipe is communicated with the heat absorption chamber, and extends through the base to the outside of the lamp tube; an evaporation tube connected to the second tube end of the heat absorption tube, the second tube end is arranged opposite to the first tube end, the evaporation tube is communicated with the heat absorption chamber, and extends through the base to the outside of the lamp tube; the condensation tube is connected to the evaporation tube and the liquid inlet pipe to condense the gaseous phase change material in the evaporation tube and pass it into the liquid inlet pipe.

[0007] According to one embodiment of the present application, the lamp tube is installed on the base through a connecting assembly, and the connecting assembly includes: a clamp, which is sleeved on the outside of the lamp tube, the clamp is clamped and fixed to the lamp tube, and the clamp extends radially outward along the clamp toward one end of the base to form a step surface; a first fastener passes through the step surface to fix the clamp to the base.

[0008] According to one embodiment of the present application, the clamp includes two relatively arranged half clamps, which are mounted outside the lamp tube after being clamped together. A raised limit block is provided on the inner wall of the half clamp, and a limit groove corresponding to the limit block is opened on the lamp tube.

[0009] According to one embodiment of the present application, the connection assembly further includes: a fixing ring, which is sleeved outside the two half hoops to fix the two half hoops in an embraced state, and the fixing ring and the half hoops are fixed by screws.

[0010] According to one embodiment of the present application, it includes: an adapter ring, including a first end and a second end arranged opposite to the first end, the first end is fixed to the base by a second fastener, and the outer wall of the second end of the adapter ring is connected to a threaded block, and the threaded block is used to be threadedly connected to the lampshade.

[0011] According to one embodiment of the present application, the evaporating tube includes: a bending section, which is arranged in the lamp tube, the bending section is connected to the second tube end of the heat absorbing tube, and is bent toward the first tube end outside the heat absorbing tube; a straight section, which is connected to the bending section and extends through the base to the outside of the lamp tube to connect to the condensing tube, and the straight section is arranged to fit the heat absorbing tube.

[0012] According to one embodiment of the present application, it includes: a bracket, fixed to the side of the base away from the lamp tube and sleeved outside the condenser tube, and the bracket is provided with a heat dissipation hole; a fan is arranged on the bracket.

[0013] According to an embodiment of the present application, a ventilation opening is provided at one end of the lamp tube away from the base.

[0014] According to one embodiment of the present application, the light-emitting component is an LED lamp, and a plurality of attachment platforms are arranged circumferentially on the outer wall of the heat absorption tube. The extension direction of the attachment platform is arranged along the axial direction of the heat absorption tube. The surface of the attachment platform on one side away from the heat absorption tube is a planar attachment position, and the attachment position is for the LED lamp to be attached and set.

[0015] The beneficial effects of the present application are as follows: the heat absorbing tube of the lighting device of the present application is located inside the lamp tube, and the condensing tube is located outside the lamp tube. The heat absorbing tube absorbs the heat generated by the heating element, and transfers the heat from the narrow internal enclosed space of the lamp tube to the outside of the lamp tube for heat dissipation, which effectively reduces the internal ambient temperature of the lamp tube and improves the condensation efficiency of the condensing tube on the gaseous phase change material. Due to the improvement in heat dissipation efficiency, the heat dissipation component can match a higher-power light-emitting component and has a wider range of applications. Since the lighting device in the present application has a heat dissipation component, when a higher-power light-emitting component is used, the lighting device can be installed without modifying the existing lamp structure, which is conducive to large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of a street lamp of the present application;

[0018] Figure 2 is a schematic diagram of the three-dimensional structure of an embodiment of the lighting device of the present application;

[0019] Figure 3 It is a schematic diagram of a partially exploded structure of an embodiment of a lighting device of the present application, in which a lamp tube and a connecting component are hidden;

[0020] Figure 4 is a schematic structural diagram of a lamp tube of an embodiment of a lighting device of the present application;

[0021] Figure 5 is a schematic diagram of an exploded structure of a connection assembly of an embodiment of a lighting device of the present application;

[0022] Figure 6 It is a partial structural schematic diagram of an embodiment of the lighting device of the present application, mainly used to show the lighting device from another viewing angle;

[0023] Figure 7 It is a partial structural schematic diagram of an embodiment of a heat dissipation assembly of the present application, mainly used to show the condenser;

[0024] Figure 8 It is a partial structural schematic diagram of an embodiment of a heat dissipation component of the present application, mainly used to display the heat absorption tube. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] An embodiment of the present application discloses a street lamp 100, such as Figures 1 to 3As shown, it includes an inner lampshade 110 and a lighting device 200. The inner lampshade 110 includes a light-transmitting cover 111 and a light-reflecting cover 112, wherein the light-transmitting cover 111 is arranged on the side facing the ground and is a light-transmitting transparent material. The light-reflecting cover 112 is arranged above the light-transmitting cover 111, and a first space is formed between the light-transmitting cover 111 and the light-transmitting cover 111, and the first space has a first opening 113, and the light-reflecting cover 112 reflects the light in the first space to the ground.

[0027] In one embodiment, the lighting device 200 includes a base 210, a lamp tube 220, a heat dissipation assembly 300, and a light-emitting element 230. The lamp tube 220 is mounted on the base 210, and the lamp tube 220 can be placed in the first space of the inner lampshade 110 through the first opening 113. The heat dissipation assembly 300 includes a heat absorption portion, and the heat absorption portion is located in the lamp tube 220. Since the heat absorption portion of the heat dissipation assembly 300 is located in the lamp tube 220, it can effectively absorb the heat of the light-emitting element 230, reduce the temperature in the lamp tube 220, and increase the service life of the light-emitting element 230. It can also match high-power light-emitting elements 230, and has a wider range of applications. In addition, the lighting device 200 is placed in the inner lampshade 110 from the first opening 113, and can be installed or disassembled and replaced. It has a simple structure and is easy to operate. It can be installed on most street lamps on the market, which is conducive to large-scale promotion and use.

[0028] Specifically, the light emitting element 230 may be a high-power LED lamp.

[0029] In one embodiment, the lighting device 200 further includes an adapter ring 240, which includes a first end 241 and a second end 242 opposite to each other. The first end 241 is fixedly connected to the base 210, and the second end 242 is fixedly connected to the first opening 113. Figure 1 , Figure 2 and Figure 4 As shown, the first end 241 of the adapter ring 240 includes a flange 2411 extending outward from the outer wall of the adapter ring 240, and the flange 2411 is fixed to the base 210 by a fastener. Specifically, the fastener is a bolt, which passes through the flange 2411 and is threadedly connected to the base 210 to fix the adapter ring 240 to the base 210. The outer wall of the second end 242 of the adapter ring 240 is connected with a threaded block 2421, and the inner wall at the first opening 113 of the inner lampshade 110 is provided with a screw hole matching the threaded block 2421, and the threaded block 2421 is threadedly connected to the threaded hole. Specifically, the outer wall of the second end 242 is provided with three threaded blocks 2421 along a circumferential array.

[0030] It should be noted that, in one embodiment, the connection structure matching the inner lampshade 110 and the lighting device 200 is a threaded hole (not shown in the figure), so the adapter ring 240 is provided with a threaded block 2421 matching the threaded hole. In other embodiments, if the inner lampshade 110 is provided with other structures such as a card slot, the second end 242 of the adapter ring 240 can be provided with a card block matching the card slot; or, the adapter ring 240 can also be fixed to the inner lampshade 110 by bolts. It is only necessary to design the adapter ring 240 that can be installed on the inner lampshade 110 according to actual conditions, and the lighting device 200 can be installed on the inner lampshade 110, which is not limited here.

[0031] In order to protect the heat dissipation assembly 300 located outside the inner lamp housing 110, as Figure 1 As shown, the street lamp 100 further includes an outer lampshade 120, which is arranged outside the inner lampshade 110, and a second space 121 is formed between the outer lampshade 120 and the inner lampshade 110. The heat dissipation assembly 300 further includes a heat dissipation part, which is located in the second space 121, so that the outer lampshade 120 protects the heat dissipation assembly 300, prevents rain and other factors from corroding or damaging the heat dissipation assembly 300, and improves its service life. In addition, since the light-emitting element 230 in the lighting device 200 is easy to attract flying insects, the outer lampshade 120 can further reduce the flying insects from entering the inner lampshade 110, keep the inner lampshade 110 clean, and maintain the light-emitting effect of the light-emitting element 230.

[0032] like Figure 1 As shown, the outer lamp cover 120 includes a bottom plate 122 and a cover plate 123. The cover plate 123 is covered on the bottom plate 122 and is hinged to the bottom plate 122, so that the lighting device 200 can be easily replaced after the cover plate 123 is opened. A second opening is provided on the bottom plate 122, and the light-transmitting cover 111 is provided at the second opening and is located below the second opening, and the reflective cover 112 is located above the second opening. Specifically, the bottom plate 122 is in the shape of a flat plate, and the cover plate 123 is in the shape of a hemisphere, an ellipsoid, or other shapes with an internal space.

[0033] In order to facilitate the staff to replace the lighting device 200, Figure 1 As shown, a support rod 124 is provided inside the outer lampshade 120, and the support rod 124 includes a first support section and a second support section that are hinged to each other, the first support section is hinged to the bottom plate 122, and the second support section is hinged to the cover plate 123. When the first support section and the second support section are located in the same straight line, the cover plate 123 is in a state where one end is away from the bottom plate 122, which is convenient for the staff to replace the internal lighting device 200. Specifically, the first support section and the second support section can be kept in the same straight line by using the friction force at the hinge of the two, thereby supporting the cover plate 123. Alternatively, the first support section and the second support section can also be kept in the same straight line by providing a clamping structure at the hinge, thereby supporting the cover plate 123.

[0034] In other embodiments, one end of the support rod 124 is hinged to the bottom plate 122, and the other end of the support rod 124 is used to support the cover plate 123, so as to support one end of the cover plate 123 away from the bottom plate 122, so as to facilitate the staff to replace the internal lighting device 200. A support block for the support rod 124 to abut against can be provided inside the cover plate 123.

[0035] In one embodiment, if Figure 1 As shown, the street lamp 100 further includes a lamp pole 130, and the outer lampshade 120 is disposed on the top of the lamp pole 130. Specifically, the lamp pole 130 includes a vertical section 131 and an oblique section 132, the vertical section 131 is vertically disposed on the ground, and the oblique section 132 is connected to the top of the vertical section 131. The outer lampshade 120 has a clamp 125 inside, and the clamp 125 fixes the oblique section 132 inside the outer lampshade 120, and the clamp 125 is fixed to the outer lampshade 120 by bolts.

[0036] like Figures 3 to 6 As shown, the lamp tube 220 is installed on the base 210 through a connecting assembly 270, and the connecting assembly 270 includes a hoop 250 and a first fastener 252. The hoop 250 is sleeved outside the lamp tube 220 and is located between the lamp tube 220 and the adapter ring 240. The hoop 250 is clamped and fixed with the lamp tube 220. One end of the hoop 250 facing the base 210 extends radially outward along the hoop 250 to form a step surface 254. The first fastener 252 passes through the step surface 254 to fix the hoop 250 to the base 210, so that the lamp tube 220 can be fixed to the base 210 through the hoop 250. Specifically, the first fastener 252 is a bolt.

[0037] Furthermore, if Figure 4 and Figure 5 As shown, the clamp 250 includes two half hoops 251 that are arranged opposite to each other, and the two half hoops 251 are identical. After the two half hoops 251 are clamped together, they are sleeved outside the lamp tube 220. The inner wall of the half hoops 251 is provided with a raised stop block 2511, and the lamp tube 220 is provided with a stop groove 222 that is arranged corresponding to the stop block 2511. After the two clamps 250 are clamped together, the stop block 2511 is clamped in the stop groove 222, so that the clamp 250 and the lamp tube 220 are fixed to each other. By setting the clamp 250 as two identical half hoops 251, the manufacturing process is simple, and the mold cost can be saved, thereby reducing the cost.

[0038] In order to make the connection between the two half hoops 251 stable, Figure 5 As shown, the connection assembly 270 also includes a fixing ring 253, which is sleeved outside the two half hoops 251 to fix the two half hoops 251 in an embraced state. The fixing ring 253 is located between the hoop 250 and the adapter ring 240, and the fixing ring 253 and the half hoops 251 are fixed by screws.

[0039] In one embodiment, if Figure 4 As shown, the lamp tube 220 in the lighting device 200 is a quartz glass tube, and an air permeable opening 221 is provided at one end of the lamp tube 220 away from the base 210 to enhance air circulation inside the lamp tube 220 and speed up the heat dissipation efficiency inside the lamp tube 220 .

[0040] like Figure 3 As shown, the lighting device 200 further includes a power supply 260 , which is electrically connected to the light-emitting element 230 . The power supply 260 extends from the inside of the lamp tube 220 through the base 210 to the outside of the lamp tube 220 .

[0041] The heat absorbing part of the heat dissipation component 300 in the lighting device 200 of the present application is located inside the lamp tube 220, and the heat dissipation part is located outside the lamp tube 220. After the heat absorbing part absorbs the heat of the light-emitting part 230, the heat is transferred from the narrow internal enclosed space of the lamp tube 220 to the outside of the lamp tube 220 for heat dissipation, which effectively reduces the internal ambient temperature of the lamp tube 220 and improves the condensation efficiency of the heat dissipation part on the gaseous phase change material. Since the lighting device 200 in the present application has high heat dissipation efficiency, it can match a light-emitting part 230 with higher power and has a wider range of applications. Since the lighting device 200 in the present application has a heat dissipation component 300, when a light-emitting part 230 with higher power is adopted, the lighting device 200 can be installed without modifying the existing lamp structure, which is conducive to large-scale promotion and use.

[0042] In one embodiment, if Figure 3 and Figure 7 As shown, the heat dissipation assembly 300 further includes a heat absorbing tube 310 and a condenser tube 320. The heat absorbing tube 310 is a heat absorbing part, and the condenser tube 320 is a heat dissipation part. The heat dissipation assembly 300 can be used in the above-mentioned lighting device 200. The heat absorbing tube 310 is arranged in the lamp tube 220, and a heat absorbing cavity for the phase change material to flow is formed inside the heat absorbing tube 310. The light emitting element 230 is attached to the surface of the heat absorbing tube 310; the condenser tube 320 is arranged outside the lamp tube 220 and communicated with the heat absorbing tube 310. The condenser tube 320 is located outside the lamp tube 220 to improve its heat dissipation efficiency. Thus, the phase change material in the heat absorption tube 310 absorbs the heat emitted by the light-emitting element 230, undergoes phase change and evaporates. The evaporated phase change material is cooled and liquefied in the condenser tube 320 and then flows back into the heat absorption tube 310. The heat dissipation component 300 absorbs the heat generated by the light-emitting element 230 and transfers the heat from the narrower internal enclosed space of the lamp tube 220 to the outside of the lamp tube 220 for heat dissipation, effectively reducing the internal ambient temperature of the lamp tube 220 and improving the condensation efficiency of the condenser tube 320 for the gaseous phase change material. Due to the improvement of heat dissipation efficiency, the heat dissipation component 300 can match the light-emitting element 230 with higher power and has a wider range of applications.

[0043] Furthermore, if Figure 3As shown, the heat dissipation assembly 300 further includes a liquid inlet pipe 370 and an evaporation pipe 330. The heat absorption pipe 310 includes a first pipe end 311 and a second pipe end 312. The liquid inlet pipe 370 is connected to the first pipe end 311, and the first pipe end 311 is arranged close to the base 210. The liquid inlet pipe 370 is communicated with the heat absorption chamber and extends through the base 210 to the outside of the lamp tube 220. The evaporation pipe 330 is connected to the second pipe end 312. The evaporation pipe 330 is communicated with the heat absorption chamber and extends through the base 210 to the outside of the lamp tube 220. The condensation pipe 320 is connected to the evaporation pipe 330 and the liquid inlet pipe 370. The gaseous phase change material in the evaporation pipe 330 enters the liquid inlet pipe 370 after condensation.

[0044] Among them, Figure 3 As shown, the evaporation tube 330 includes a bent section 331 and a straight section 332. The bent section 331 is connected to the second tube end 312 of the heat absorption tube 310 and is bent toward the first tube end 311 outside the heat absorption tube 310. The straight section 332 is connected to the bent section 331 and extends through the base 210 to the outside of the lamp tube 220 to connect to the condenser tube 320. In order to make the heat dissipation assembly 300 more compact, the straight section 332 is arranged to fit the heat absorption tube 310.

[0045] In order to increase the flow rate of the phase change material in the heat absorbing tube 310, and thus improve the heat dissipation efficiency, as Figure 3 As shown, the second tube end 312 of the heat absorbing tube 310 needs to be higher than the first tube end 311, so that the gaseous phase change material can enter the evaporating tube 330 and then flow into the condensing tube 320. When the heat dissipation assembly 300 is used in the street lamp 100, since the light emitting element 230 in the street lamp 100 needs to be set at an elevation angle of 12° to 15° with the horizontal plane, the second tube end 312 of the heat absorbing tube 310 can be kept higher than the first tube end 311, so that the gaseous phase change material can enter the evaporating tube 330 and improve the heat exchange efficiency.

[0046] Among them, Figure 7 As shown, the condenser 320 includes at least two first tube segments 321 and at least one second tube segment 322, wherein the first tube segments 321 are arranged at least along a first preset direction, and the second tube segment 322 connects two adjacent first tube segments 321 end to end in sequence, so that the condenser 320 is arranged in a winding manner, thereby increasing the length of the condenser 320 and improving its heat dissipation efficiency.

[0047] Since the heat dissipation assembly 300 is installed in the second space 121 of the street lamp 100, the space is relatively narrow, and the number of first pipe segments 321 that can be set in the first preset direction is limited. In order to extend the length of the condenser 320, the first pipe segments 321 can also be arranged along the second preset direction, and the angle between the first direction and the second direction is 10°-45°, such as 10°, 18°, 30° or 45°. The first preset direction and the second preset direction are directions in the second space 121 suitable for accommodating the condenser 320. Of course, the first pipe segments 321 can also be arranged along the third preset direction to improve the heat dissipation efficiency of the condenser 320, and only need to be adjusted according to the actual space size in the second space 121.

[0048] In order to further improve the heat dissipation efficiency of the condenser tube 320, a plurality of fins 323 are provided outside the condenser tube 320 (it should be noted that the first tube section 321 and the second tube section 322 marked in the figure are both sleeved with fins 323, and the first tube section 321 and the second tube section 322 refer to the pipes inside the fins 323). The fins 323 are sleeved on the outer surface of the condenser tube 320 and arranged along the length direction of the condenser tube 320. The fins 323 increase the heat exchange area between the condenser tube 320 and the air, thereby accelerating the heat dissipation of the condenser tube 320.

[0049] like Figure 3 As shown, the heat dissipation assembly 300 also includes a bracket 350 and a fan 360. The bracket 350 is sleeved outside the condenser 320, and the internal space of the bracket 350 matches the outer contour of the condenser 320. The bracket 350 is provided with a heat dissipation hole 351, and the fan 360 is arranged on the bracket 350. Compared with the condenser 320 using natural wind to dissipate heat, the fan 360 can speed up the air flow rate, thereby improving the heat dissipation efficiency of the condenser 320, so that the gaseous phase change material can condense as soon as possible and flow into the heat absorption tube 310. Specifically, the bracket 350 can be installed on the base 210 and fixed by bolts.

[0050] In one embodiment, if Figure 8 As shown, the outer wall of the heat absorbing tube 310 is provided with a plurality of attachment platforms 314 arranged along the circumferential direction, and the extension direction of the attachment platforms 314 is provided along the axial direction of the heat absorbing tube 310, and the surface of the attachment platform 314 on the side away from the heat absorbing tube 310 is a flat attachment position. When the light emitting element 230 is an LED lamp, the attachment position is provided for the LED lamp to be attached and set, and since the shape of the LED and the like is a cube, when installing the LED lamp, thermal conductive silica gel or thermal conductive silicone grease needs to be provided on the attachment position, so that the LED lamp can transfer heat to the heat absorbing tube 310, so that the flat attachment position can make the LED lamp fully contact with the thermal conductive silica gel or thermal conductive silicone grease.

[0051] In addition, in order to save costs, the light-emitting component 230 is usually fixed to the outside of the heat absorption tube 310 by screws. However, the wall of the heat absorption tube 310 is relatively thin and is not sufficient to support the thickness required for the screw threaded connection to penetrate. After the attachment platform 314 is set on the outer wall of the heat absorption tube 310, the attachment platform 314 has a certain thickness. The two ends of the light-emitting component 230 can be fixed to the attachment platform 314 by screws, which can solve the problem that the wall of the heat absorption tube 310 is relatively thin and it is not convenient to fix the light-emitting component 230 on the heat absorption tube 310 by screws.

[0052] Of course, in other embodiments, the light emitting member 230 may also be fixed to the outside of the heat absorbing tube 310 by other means such as a clamp or bonding, which is not limited here.

[0053] like Figure 8 As shown, a receiving groove 316 is formed between two adjacent attachment platforms 314 , so that the straight section 332 can be stuck in one of the receiving grooves 316 , and the heat dissipation assembly 300 has a more compact structure.

[0054] When the lighting device 200 including high-power LED lamps is used to replace the sodium lamps in some existing street lamps, in order to maintain the consistency of the irradiation area, the LED lamps are arranged circumferentially on the attachment platform 314 of the heat absorption tube 310, so as to facilitate the control of the irradiation area of ​​the LED lamp to be the same as the irradiation area of ​​the original sodium lamp. Alternatively, in other embodiments, the LED lamp can be only arranged in the lower half of the heat absorption tube 310, and a lens can be arranged below the LED lamp to control the irradiation area of ​​the LED lamp to be the same as the irradiation area of ​​the original sodium lamp.

[0055] In other embodiments, other heat generating components 340 other than the light emitting component 230 may be attached to the outer periphery of the heat absorbing tube 310 , such as electronic chips and other devices.

[0056] In one embodiment, the heat absorbing tube 310 is arranged in a straight line, and the cross section of the heat absorbing tube 310 is designed to be circular, elliptical or square. Preferably, the cross section of the heat absorbing tube 310 is circular, and the liquid absorption cavity is formed along the inner axial direction of the heat absorbing tube 310.

[0057] like Figure 8 As shown, end covers 315 can be provided at both ends of the heat absorption tube 310, and the end covers 315 are fixedly mounted on both ends of the heat absorption tube 310. The end covers 315 can strengthen the connection between the heat absorption tube 310 and the evaporation tube 330 and the liquid inlet tube 370. At the same time, the power supply component 260 electrically connected to the heating element 340 can be fixed on the end covers 315, so as to reduce the load of the heat absorption tube 310, improve the stability of the structure of the heat absorption tube 310, and avoid the problem of internal phase change material leakage.

[0058] Furthermore, the heat dissipation component 300 also includes a liquid wick, which is located in the liquid wick cavity. The liquid wick has capillaries to absorb the phase change material in the heat absorption cavity. The liquid wick absorbs the phase change material by capillary action, and provides power for the condensed phase change material in the condenser tube 320 to flow back into the liquid wick cavity, so that the liquid wick cavity is filled with the phase change material. Specifically, the liquid wick can be made of a porous material made of metal powder, metal mesh or ceramic powder, such as copper powder or aluminum powder. A steam discharge channel is also provided on the liquid wick. When the phase change material evaporates due to heat, the gaseous phase change material is transmitted from the steam discharge channel to the evaporation tube 330.

[0059] During operation, the heat absorption tube 310 receives the heat transferred from the heating element 340, the phase change material in the liquid absorption chamber evaporates inside the liquid absorption chamber, flows to the condenser 320 through the evaporation tube 330, and the gaseous phase change material condenses inside the condenser 320, releasing the heat to the space where the condenser 320 is located. Under the action of the condensed phase change material liquid absorption core, it quickly flows back to the liquid absorption chamber of the heat absorption tube 310 through the liquid inlet pipe 370, and thus the cycle is repeated, and the heat can be continuously transferred from the heating element 340 and the space where the heating element 340 is located to the space where the condenser 320 is located at a distance for heat dissipation. In other embodiments, the heat dissipation component 300 can also use a power device such as a water pump to accelerate the condensate to flow back to the heat absorption tube 310. Preferably, the water pump can be set at the condenser 320. Alternatively, the liquid absorption core can also be used in combination with other power devices such as a water pump, which is not limited here.

[0060] The heat dissipation assembly 300 of the present application has high heat dissipation efficiency, simple and compact structure, and small size. It can continuously transfer heat from the heating element 340 and the space where the heating element 340 is located to the space where the condenser 320 is located at a distance for heat dissipation, thereby reducing the temperature of the working environment of the heating element 340 and increasing the service life of the heating element 340.

[0061] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A lighting device, characterized in that: include: Base; A lamp tube, mounted on the base; A heat absorbing tube is arranged in the lamp tube, a heat absorbing cavity for phase change material to flow is formed inside the heat absorbing tube, and the heat absorbing tube is provided with a first tube end and a second tube end opposite to each other; a plurality of attachment platforms are arranged along the circumferential direction on the outer wall of the heat absorbing tube, and the extension direction of the attachment platform is arranged along the axial direction of the heat absorbing tube, and the surface of the attachment platform on one side away from the heat absorbing tube is a flat attachment position; A condenser tube is arranged outside the lamp tube and is connected to the heat absorbing tube; A light emitting member is attached to an attachment position on the surface of the heat absorbing tube; a liquid inlet pipe connected to the first tube end, the first tube end being arranged close to the base, the liquid inlet pipe being communicated with the heat absorption cavity, and extending through the base to the outside of the lamp tube; an evaporation tube connected to the second tube end, the evaporation tube being in communication with the heat absorption chamber and extending through the base to the outside of the lamp tube; The condenser pipe is connected to the evaporator pipe and the liquid inlet pipe, so as to condense the gaseous phase change material in the evaporator pipe and then pass it into the liquid inlet pipe; The evaporation tube comprises: A bending section, disposed in the lamp tube, connected to the second tube end, and bent toward the first tube end outside the heat absorbing tube; A straight section connects the bent section, passes through the base, extends to the outside of the lamp tube, and connects to the condenser tube. The straight section is arranged in close contact with the heat absorbing tube.

2. The lighting device according to claim 1, characterized in that: The lamp tube is mounted on the base via a connecting assembly, and the connecting assembly comprises: A hoop, which is sleeved outside the lamp tube, the hoop is clamped and fixed to the lamp tube, and one end of the hoop extends radially outward toward the base to form a step surface; A first fastener passes through the step surface to fix the clamp to the base.

3. The lighting device according to claim 2, characterized in that: The clamp comprises two relatively arranged half clamps, which are sleeved outside the lamp tube after being clamped together, and the inner wall of the half clamp is provided with a raised limiting block, and the lamp tube is provided with a limiting groove corresponding to the limiting block.

4. The lighting device according to claim 3, characterized in that: The connection component also includes: A fixing ring is sleeved outside the two half hoops to fix the two half hoops in an embraced state, and the fixing ring and the half hoops are fixed by screws.

5. The lighting device according to claim 1, characterized in that: include: The adapter ring comprises a first end and a second end opposite to each other, wherein the first end is fixed to the base via a second fastener, and a threaded block is connected to the outer wall of the second end of the adapter ring, and the threaded block is used for threaded connection with the lampshade.

6. The lighting device according to claim 1, characterized in that: include: A bracket is fixed to a side of the base away from the lamp tube and sleeved outside the condenser tube, and the bracket is provided with a heat dissipation hole; The fan is arranged on the bracket.

7. The lighting device according to claim 1, characterized in that: The lamp tube is provided with a ventilation opening at one end away from the base.

8. The lighting device according to claim 1, characterized in that: The light emitting component is an LED lamp, and the attachment position is for the LED lamp to be attached and set.

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