LED lamp assembly capable of being modularly maintained

Abstract

The invention relates to the technical field of lamps, in particular to an LED lamp assembly capable of being modularly maintained. The LED lamp comprises a shell used for being embedded in a ceiling, an LED lamp source is arranged at the bottom of the shell, an interface end is embedded in the outer wall of the shell, a radiator used for heat dissipation is arranged at the top of the shell, and the radiator is exposed in the air; a central framework is fixedly arranged in an inner cavity of the shell and comprises a hollow pipe located in the inner cavity of the shell, and an inner cavity of the hollow pipe is a first heat dissipation channel. By arranging the shell, the central framework, the first heat dissipation channel and the second heat dissipation channel, due to heat isolation between the first heat dissipation channel and the second heat dissipation channel, heat conduction is conducted between a core heat source (LED lamp source) and a secondary heat source (interface end) through the first heat dissipation channel and the second heat dissipation channel respectively, and mutual influence of the heat sources is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lamps and lanterns, in particular to a modular maintenance LED lamp assembly. BACKGROUND

[0002] With the rapid development of LED lighting technology, LED lamps and lanterns have been widely used in home lighting, commercial lighting, industrial lighting and public infrastructure lighting and many other fields due to their significant advantages of high efficiency, long service life, environmental protection and no pollution.

[0003] LED lamps and lanterns have become the mainstream choice to replace traditional incandescent lamps, fluorescent lamps and other low-efficiency lighting products, and the market demand is showing a rising trend year by year. In the prior art, a plurality of heat sources (such as LED light sources, driving power supply modules, wherein the LED light source is the core heat source, and the driving power supply module is the secondary heat source) are usually provided in the LED lamp assembly, and the heat generated by the plurality of heat sources is transported through the same channel. Due to the different heat generated by the plurality of heat sources, the heat of the heat sources affects each other, thereby reducing the cooling efficiency of the entire lamp, and the service life of the entire lamp is reduced. In view of this, we propose a modular maintenance LED lamp assembly. SUMMARY

[0004] The purpose of the present application is to provide a modular maintenance LED lamp assembly to solve the problem of heat generated by multiple heat sources being transported through the same channel, which causes the heat of the heat sources to affect each other.

[0005] To achieve the above purpose, the present application provides a modular maintenance LED lamp assembly, which comprises a shell for embedding in the ceiling, the shell bottom is provided with an LED light source, and the shell outer wall is embedded with an interface end, the shell top is provided with a radiator for heat dissipation, and the radiator is exposed to the air; the shell inner cavity is fixedly provided with a center framework, the center framework comprises a hollow pipe in the shell inner cavity, the hollow pipe inner cavity is a first heat dissipation channel, the hollow pipe outer wall and the shell inner wall form a second heat dissipation channel, and are arranged to be thermally insulated between the first heat dissipation pipe and the second heat dissipation channel; the radiator is arranged at the top of the first heat dissipation channel and the second heat dissipation channel; the first heat dissipation channel is in communication with the LED light source, and the second heat dissipation channel is in communication with the interface end.

[0006] Further, the hollow pipe is made of heat insulation material of engineering plastic.

[0007] Further, the hollow pipe is fixedly connected with a heat insulation seat plate and a heat conduction plate at both ends respectively; the heat insulation seat plate is fixedly connected with the shell by bolts, and the chip of the LED light source is fixed at the bottom of the heat insulation seat plate; the upper surface of the heat conduction plate is attached to the bottom of the radiator, and the heat conduction plate is made of high-thermal-conductivity metal material.

[0008] Further, a slot for fixing the interface end is formed on the shell, and a uniform temperature plate is installed on one side of the second heat dissipation channel inside the slot.

[0009] Further, a sleeve ring is arranged at the bottom of the heat sink for sleeving the heat conduction plate.

[0010] Further, a buffer groove is formed in the heat sink and communicates with the first heat dissipation channel.

[0011] Further, a lampshade is installed at the bottom of the heat insulation seat plate, and a lens is arranged at the bottom of the lampshade.

[0012] Further, a buckle male head is arranged on the lampshade, and a buckle female head is arranged on the shell, and the buckle male head is arranged to be clamped with the buckle female head, so that the lampshade is fixedly connected to the bottom of the shell.

[0013] Further, a plurality of hole grooves are formed on one side of the hollow pipe close to the heat conduction plate, for exchanging heat between the first heat dissipation channel and the second heat dissipation channel, so as to increase the area of the contact heat conduction plate.

[0014] As a further improvement of the technical solution, based on the cooperative design of the shell, the center framework, the first heat dissipation channel and the second heat dissipation channel of the embodiment, the optimization of the heat transfer path and the improvement of the heat dissipation efficiency are realized.

[0015] Compared with the prior art, the beneficial effects of the present application are: In the modularized maintenance LED lamp assembly, by arranging the shell, the center framework, the first heat dissipation channel and the second heat dissipation channel, the core heat source (LED light source) and the secondary heat source (interface end) are respectively conducted by the first heat dissipation channel and the second heat dissipation channel due to the thermal resistance between the first heat dissipation channel and the second heat dissipation channel, so that the two types of heat sink are contacted for cooling, and high temperature accumulation in the area receiving heat of the heat sink is avoided.

[0016] Moreover, the double-path heat conduction system perfectly matches the modularity (such as the pluggable interface end) of the lamp, and the LED light source (light source module) and the interface end (drive module) each have a heat management path, which realizes modularity in physical structure and heat management, and reduces the mutual influence of heat sources caused by heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present application; Figure 2 is an exploded view of part of the components in the present application; Figure 3 is a structural schematic diagram of the shell and the center framework in the present application; Figure 4It is the schematic diagram of the principle that heat enters the heat sink through the first and second heat dissipation channels in the application; Figure 5 It is the schematic diagram of the structure inside the shell in the application; Figure 6 It is the schematic diagram of the structure of the heat sink in the application; Figure 7 It is the schematic diagram of the structure of the heat sink in the application; Figure 2 It is the schematic diagram of the structure of the heat sink in the application;

[0018] The meanings of the respective numbers in the figure are as follows: 1, shell; 11, lampshade; 111, buckle male head; 112, buckle female head; 12, LED light source; 13, insertion slot; 14, interface end; 15, uniform temperature plate; 2, heat sink; 21, collar; 22, buffer groove; 3, center framework; 31, hollow pipe; 32, heat insulation seat plate; 33, heat conduction plate; 34, hole groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the application. EMBODIMENT

[0020] Please refer to Figures 1-7 , the embodiment provides an LED lamp assembly which can be modularly maintained, comprising a shell 1 and a center framework 3, the shell 1 is sleeved on the center framework 3; one end of the center framework 3 is connected with an LED light source 12, wherein the LED light source 12 is fixedly installed on an aluminum substrate, and the aluminum substrate is directly installed on the center framework 3; a side wall of the shell 1 is embedded with an interface end 14, the interface end 14 is provided with three groups of wire interfaces (corresponding to a live wire, a zero line and a ground wire respectively), and the interface end 14 further comprises a constant current driving IC (such as AP5165B), capacitor / inductor and other components, and a wiring terminal; the other end of the center framework 3 is connected with a heat sink 2, heat generated by the LED light source 12 and the interface end 14 is guided to the heat sink 2 through the center framework 3, and the heat is exchanged with air through the heat sink 2, so that the overall cooling of the LED lamp is realized.

[0021] The installation and use process of the LED lamp is as follows: first, the total home switch or the corresponding circuit switch is closed, the LED lamp is installed and fixed in the corresponding position (such as the ceiling), and the three wires in the home circuit: the live wire (usually red or brown), the zero line (usually blue or black), and the ground wire (usually yellow-green) are respectively connected with the three groups of interfaces on the interface end 14, and then the total home switch or the corresponding circuit switch is opened. When the power is turned on, the AC power (such as AC 220V) enters the interface end 14, is converted into low-voltage direct current after rectification, filtering and voltage reduction, to ensure that the current output to the LED light source 12 is stable and safe, and the stable low-voltage direct current drives the semiconductor PN junction (such as gallium nitride GaN, gallium phosphide GaP, etc.) on the LED light source 12 to generate electroluminescence effect, converting electrical energy into light energy, at the same time, about 70-80% of the electrical energy will be converted into heat energy, causing the chip temperature to rise rapidly, at this time, the heat generated is rapidly conducted to the heat sink 2 through the aluminum substrate, the heat sink 2 absorbs heat and exchanges heat with the surrounding air through its large surface area, taking away the heat, ensuring that the junction temperature of the LED light source 12 is maintained within a safe range; The original light emitted by the LED light source 12 enters the lampshade 11, and is converged into a beam (light gathering) by the lens, or is scattered and mixed by the reflector and the diffusion plate to form a uniform, comfortable and specific illumination range. The light spot finally illuminates the target.

[0022] Among them, the light emitted by the LED light source 12 through the electroluminescence effect has the following specific working principle: after a voltage is applied to the material, electrons are injected into the conduction band of the material (i.e. the PN junction of the semiconductor material) from the negative electrode (cathode), and holes are injected into the valence band of the material from the positive electrode (anode); The injected electrons and holes move in the direction of the positive electrode and the negative electrode under the action of the electric field force, and meet in the material; After the electron and the hole meet, the electron jumps from the high-energy level of the conduction band to the low-energy level of the valence band, and the excess energy is released in the form of photons (visible light), thereby generating a luminescence phenomenon.

[0023] However, since the LED light source 12 emits light by relying on the recombination of electrons and holes in the chip, only about 30%-50% of the electrical energy will be converted into light energy in this process, and the remaining 50%-70% of the energy will be released in the form of heat energy. When the heat dissipation speed is slower than the heat generation speed, the overall temperature of the lamp will continue to rise, the internal structure of the LED light source 12 will be damaged, and the original heat dissipation system may not be able to meet the heat dissipation demand when the overall performance of the LED lamp is upgraded or adjusted, resulting in damage to the LED light source 12. Therefore, the central framework 3 is constructed in an I-shaped structure, wherein: The central framework 3 includes a hollow tube 31, a heat-conducting plate 33 and a heat-insulating seat plate 32, the heat-conducting plate 33 and the heat-insulating seat plate 32 are symmetrically installed at both ends of the hollow tube 31 by screw fastening, and the middle part of the heat-conducting plate 33 and the heat-insulating seat plate 32 is provided with a through groove, which is in communication with the inside of the hollow tube 31, and the two groups of through grooves and the inside space of the hollow tube 31 together form a first heat dissipation channel, which is in communication with the LED light source 12; and the aluminum substrate is installed on the heat-insulating seat plate 32 by screw fastening, and the LED light source 12 is installed and fixed on the aluminum substrate.

[0024] Further, the heat-conducting plate 33 and the heat-insulating seat plate 32 are sleeved with the shell 1, the hollow pipe 31 outer wall and the shell 1 inner wall form the second heat dissipation channel, the second heat dissipation channel is communicated with the interface end 14, the shell 1 is provided with the installation slot 13, the interface end 14 is installed in the slot 13, the female connector is arranged on the inner wall of the slot 13, the male connector is arranged on the interface end 14, the female connector and the male connector are inserted, the interface end 14 is fixed in the slot 13, the connecting pipe at the bottom of the female connector makes the interface end 14 and the LED light source 12 form the electrical connection; the interface end 14 is provided with three groups of wire connection ports on the side away from the male connector, which is used for connecting with the household circuit wire, so that; at the same time, the slot 13 is installed with the uniform temperature plate 15 on the side in the second heat dissipation channel. The heat sink 2 is arranged at the top of the first heat dissipation channel and the second heat dissipation channel, that is, the heat flow direction of the first heat dissipation channel and the second heat dissipation channel is the heat sink 2.

[0025] It is worth mentioning that the connecting pipe is integrally formed at the bottom of the female connector, the connecting pipe is made of copper material (thermal conductivity≥380W / (m・K)), the inner diameter is 3mm-5mm, the end of the connecting pipe away from the female connector is connected with the aluminum substrate conductive terminal of the LED light source 12 through welding, two tinned copper wires (wire diameter is 0.5mm-0.8mm) are arranged in the connecting pipe, which realizes the positive and negative electrode electrical connection of the interface end 14 and the LED light source 12; the slot 13 is installed with the uniform temperature plate 15 on the side in the second heat dissipation channel, the size of the uniform temperature plate 15 is 50mm×30mm×2mm (length×width×thickness), which is made of aluminum alloy material (model is 6063, thermal conductivity≥200W / (m・K)).

[0026] The heat-conducting plate 33 is provided with the heat sink 2, the heat sink 2 is provided with the sleeve ring 21 at the bottom, which is used for sleeving on the heat-conducting plate 33; the heat sink 2 comprises a plurality of heat dissipation fins, which are used for exchanging the heat generated by the lamp with air to achieve the purpose of cooling; the heat sink 2 is provided with the buffer groove 22 on the side connected with the heat-conducting plate 33, the buffer groove 22 is communicated with the first heat dissipation channel, so that the heat generated by the LED light source 12 directly enters the buffer groove 22 after passing through the first heat dissipation channel, thereby increasing the contact range of the heat and the heat sink 2, to achieve the purpose of faster cooling.

[0027] The heat-conducting plate 33 of the LED lamp needs to be made of a high-thermal-conductivity metal material (such as aluminum alloy, stainless steel, etc.) for quickly conducting the heat in the first and second heat dissipation channels and being in contact with the heat sink 2; the hollow tube 31 is made of a heat-insulating engineering plastic material (such as polycarbonate, reinforced nylon, etc.) to realize thermal insulation between the first and second heat dissipation channels; the rest, the aluminum base plate, the uniform temperature plate 15 and the fins on the heat sink 2 are all made of aluminum alloy material, which is easy to process and light in weight, can be made into a complex shape (such as a plate with fins) by extrusion and die casting, and is light in weight, facilitating the installation and design of the lamp.

[0028] Therefore, on the basis of the above, the heat transmission process of the LED lamp is as follows: when the LED light source 12 works, the temperature rapidly rises to be a core heat source, and the generated heat is first conducted to the center framework 3 through the aluminum base plate. Since the heat-insulating seat plate 32 has low heat conduction efficiency, most of the heat will enter the first heat dissipation channel and flow upward along the channel. At the same time, the interface end 14 also generates heat when working. Since the lamp is arranged in the ceiling, the heat of the interface end 14 cannot be cooled by heat exchange with the external air, and the heat will enter the second heat dissipation channel through the uniform temperature plate 15 and the inner wall of the slot 13. Since the hollow tube 31 is made of a heat-insulating engineering plastic material, the heat in the first and second heat dissipation channels will not affect each other, and will flow upward to the heat-conducting plate 33 from the first and second heat dissipation channels respectively, and finally be collected to the heat sink 2. The heat sink 2 exchanges heat with the surrounding air through multiple groups of fins and dissipates the heat to the environment.

[0029] On the one hand, the heat generated by the LED light source 12 is directly conducted to the heat-conducting plate 33 through the first heat dissipation channel, and the heat generated by the interface end 14 is conducted to the heat-conducting plate 33 through the second heat dissipation channel, forming a double-path heat conduction system, which avoids the single-channel heat dissipation adopted in the prior art, so that the two types of heat are collected in the same channel and superimposed, causing the local temperature in the channel to rise sharply.

[0030] On the other hand, the double-path heat conduction system perfectly matches the modularity (such as the pluggable interface end 14) of the lamp. The LED light source 12 (light source module) and the interface end 14 (drive module) each have a heat management path, which realizes modularity in physical structure and heat management, reduces the mutual influence of heat sources due to heat dissipation, and improves the heat dissipation effect.

[0031] Further, the outer wall of the heat insulation seat plate 32 is provided with a lampshade 11 through clamping, the lampshade 11 is provided with a lens, the shell 1 is provided with a buckle female head 112 (provided with a spring buckle structure inside), the lampshade 11 is provided with two groups of buckle male heads 111 (the front end is provided with a tapered socket), in addition, a plurality of groups of magnetic objects are installed around the inner wall of the lampshade 11, a plurality of groups of magnets are installed around the heat insulation seat plate 32, at the same time, a plurality of groups of positioning columns are arranged on the lampshade 11, the bottom of the heat insulation seat plate 32 is provided with a plurality of groups of positioning holes, each group of positioning columns is inserted into a group of positioning holes, so that the lampshade 11 is stably fixed on the group of heat conducting plates 33, and is arranged to correspond to a plurality of groups of positioning holes when the lampshade 11 is pushed to the heat conducting plate 33, at this time, each group of buckle male heads 111 is inserted into a group of buckle female heads 112, and each group of magnets is adsorbed to a group of magnetic objects, so that the lampshade 11 and the heat conducting plate 33 are firmly connected, and when the lampshade 11, the lens or the LED light source 12 needs to be replaced or repaired, the lampshade 11 is directly pulled down, so that the lampshade 11 and the shell 1 can be quickly separated.

[0032] The hollow pipe 31 further includes heat-conducting paint inside, which can further increase the heat-conducting effect; a plurality of groups of hole grooves 34 are further arranged on the top of the hollow pipe 31, and the hole grooves 34 are higher than the set position of the uniform temperature plate 15 as a whole, which is used for balancing the heat inside the hollow cavity and the separated cavity, so that when the interface end 14 emits heat, it will not directly interfere with the heat emitted by the LED light source 12, and still preferentially handle more heat emitted by the LED light source 12.

[0033] Further, a plurality of groups of insertion grooves 13 are arranged on the shell 1, and a connecting female head is arranged on the inner wall of each group of insertion grooves 13, when the light of the lamp is upgraded, after the new LED light source 12 is directly replaced, a plurality of groups of interfaces are added according to the needs; when a plurality of groups of interface ends 14 are used, when one of the interface ends 14 fails, only the corresponding group of light sources is extinguished, and the remaining 2 groups are still normally lit (the overall brightness of the lamp is reserved by 66%), avoiding the case that the whole lamp is not directly lit, especially suitable for scenes such as bedroom, corridor and other scenes that have the need for basic lighting, at the same time, if a single drive is used for a high-power lamp (such as 100W or more), the interface end 14 needs to bear a large current (such as 100W / 36V≈2.8A), long-term high-load operation will accelerate the aging of capacitors, chips and other components, and the service life is usually 2-3 years; and the 2 groups of 50W drives are split (the current of each group is approximately 1.4A), the single drive load is reduced by 50%, the component heating is reduced, and the service life can be extended to 4-5 years.

[0034] In summary, the working principle of the LED lamp of the present application is as follows: first, the heat sink 2 is directly sleeved on the heat-conducting plate 33, ensuring that the buffer groove 22 of the base and the first heat dissipation channel are in communication with each other, and ensuring that the heat conduction channel is unobstructed; the aluminum substrate is fastened and installed on the heat insulation seat plate 32 by means of bolts, and the LED light source 12 is fixed on the aluminum substrate, so that the projection of the LED light source 12 falls completely into the first heat dissipation channel, ensuring that the LED light source 12 is in communication with the first heat dissipation channel, and reserving a path for heat conduction.

[0035] Subsequently, the shell 1 is sleeved between the heat-conducting plate 33 and the heat insulation seat plate 32, and the hollow tube 31 outer wall and the shell 1 inner wall form a second heat dissipation channel; according to the requirement, the number of interface ends 14 (single group or multiple groups) is selected, the connecting male head on one side of the interface end 14 is correspondingly inserted into the connecting female head in the inner wall of the slot 13, and the fixation of the interface end 14 in the slot 13 is realized; the copper connecting pipe at the bottom of the connecting female head is used to weld and connect the interface end 14 and the conductive terminal of the aluminum substrate, and the electrical path building is completed.

[0036] Finally, the positioning column on the lampshade 11 is aligned with the positioning hole at the bottom of the heat-conducting plate 33 on which the light source module is installed, the lampshade 11 is pushed towards the heat-conducting plate 33, so that the positioning column is inserted into the positioning hole to realize the preliminary positioning; at the same time, the magnetic object in the inner wall of the lampshade 11 and the magnet on the heat-conducting plate 33 are mutually adsorbed, the buckle male head 111 on both sides of the lampshade 11 is inserted into the buckle female head 112 of the shell 1, and the firm connection of the optical module and the central framework 3 is completed.

[0037] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application, and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A modularly maintainable LED lighting assembly, comprising a housing (1) for embedding inside a ceiling, wherein an LED light source (12) is disposed at the bottom of the housing (1), and an interface end (14) is embedded in the outer wall of the housing (1), characterized in that: The shell (1) top is provided with a radiator (2) for heat dissipation, and the radiator (2) is exposed to air; The shell (1) inner cavity is fixedly provided with a center framework (3), the center framework (3) includes a hollow tube (31) located in the inner cavity of the shell (1), the inner cavity of the hollow tube (31) is a first heat dissipation channel, the second heat dissipation channel is formed between the outer wall of the hollow tube (31) and the inner wall of the shell (1), and is arranged as a thermal barrier between the first heat dissipation channel and the second heat dissipation channel; The radiator (2) is arranged at the top of the first heat dissipation channel and the second heat dissipation channel; The first heat dissipation channel is in communication with the LED light source (12), and the second heat dissipation channel is in communication with the interface end (14).

2. The modular maintainable LED luminaire assembly of claim 1, wherein: The hollow tube (31) is made of heat insulation material of engineering plastic.

3. The modular maintainable LED luminaire assembly of claim 2, wherein: The hollow tube (31) is fixedly connected with a heat insulation seat plate (32) and a heat conduction plate (33) at both ends respectively; the heat insulation seat plate (32) is fixedly connected with the shell (1) through bolts, and the chip of the LED light source (12) is fixed at the bottom of the heat insulation seat plate (32); The upper surface of the heat conduction plate (33) is attached to the bottom of the radiator (2), and the heat conduction plate (33) is made of high thermal conductivity metal material.

4. The modular maintainable LED luminaire assembly of claim 1, wherein: A slot (13) for fixedly mounting the interface end (14) is formed in the shell (1), and the slot (13) is mounted with a uniform temperature plate (15) on the inner side of the second heat dissipation channel.

5. The modular maintainable LED luminaire assembly of claim 3, wherein: The bottom of the radiator (2) is provided with a sleeve ring (21) for sleeving on the heat conduction plate (33).

6. The modular maintainable LED luminaire assembly of claim 1, wherein: A buffer groove (22) is formed in the radiator (2), and the buffer groove (22) is in communication with the first heat dissipation channel.

7. The modular maintainable LED luminaire assembly of claim 5, wherein: A lampshade (11) is mounted at the bottom of the heat insulation seat plate (32), and the lampshade (11) is provided with a lens at the bottom.

8. The modular maintainable LED luminaire assembly of claim 7, wherein: A buckle male head (111) is arranged on the lampshade (11), a buckle female head (112) is arranged on the shell (1), and the lampshade (11) is fixedly connected at the bottom of the shell (1) after the buckle male head (111) and the buckle female head (112) are clamped.

9. The modular maintainable LED luminaire assembly of claim 7, wherein: A plurality of groups of hole grooves (34) are formed on one side of the hollow tube (31) close to the heat conduction plate (33), for exchanging heat between the first heat dissipation channel and the second heat dissipation channel, so as to increase the area of the contact heat conduction plate (33).

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