High-luminous-efficiency LED fluorescent lamp tube with novel heat dissipation structure

Abstract

The utility model belongs to the technical field of LED lamps, and particularly relates to a high-luminous-efficiency LED fluorescent lamp tube with a novel heat dissipation structure, which comprises a heat dissipation tube and a lampshade, clamping grooves are arranged at two ends in the heat dissipation tube, a PCB (printed circuit board) is arranged in the clamping grooves, a plurality of LED lamp sources are fixed at the lower end of the PCB, the LED lamp sources are uniformly arranged, and the lampshade is arranged in the clamping grooves. A movable plate is arranged in the clamping groove and located at the lower end of the PCB, a plurality of limiting plates are fixed to the side, away from the PCB, of the movable plate, a limiting groove is formed in the position, located on one side of the clamping groove, in the heat dissipation pipe, and the limiting plates are matched with the limiting groove; a plurality of pieces of memory metal are fixed to the positions, located at the lower end of the movable plate, in the heat dissipation pipe. According to the LED lamp tube, the PCB can be pushed to be in close contact with the heat dissipation plate through the memory metal under temperature triggering, it is guaranteed that the LED lamp source and the PCB stably and continuously work in a proper temperature environment in combination with heat conduction and heat radiation heat dissipation of the heat dissipation plate and the heat dissipation fins, and the service life of the lamp tube is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to LED lamps technical field, specifically relates to a high luminous efficiency LED fluorescent tube with novel heat dissipation structure. BACKGROUND

[0002] At present, in the manufacturing field of LED lamp tube, the light source PCB board is usually fixed by using the clamping groove, which becomes the mainstream choice in the market, due to the size condition of the light source PCB board. Considering that the light source PCB board needs to be smoothly inserted into the clamping groove, a certain gap will be reserved between the clamping groove and the PCB board. In this way, even if the heat dissipation silicone grease is smeared on the light source PCB board, it cannot realize seamless fitting with the heat dissipation plate due to the lack of external force tight extrusion, which hinders the heat conduction from the PCB board to the heat dissipation plate, seriously affects the heat dissipation efficiency, in addition, in the actual use scene of the LED lamp tube, the light source surface is usually in a downward state. Under the continuous action of gravity, the gap originally existing between the light source PCB board and the heat dissipation plate will be further increased. This not only makes the heat conduction path longer, but also reduces the contact area, causing the conduction heat dissipation effect to drop sharply, greatly limiting the heat dissipation performance and service life of the LED lamp tube. Based on the above problems, the present application proposes a high luminous efficiency LED fluorescent tube with novel heat dissipation structure to improve the above problems.

[0003] UTILIZATION CONTENT

[0004] The utility model aims at providing a high luminous efficiency LED fluorescent tube with novel heat dissipation structure, which can push the PCB board and the heat dissipation plate into close contact under the temperature trigger of the memory metal, combine the heat conduction and heat radiation of the heat dissipation plate and the heat dissipation fins, and ensure the stable and continuous work of the LED light source and the PCB board in the appropriate temperature environment, thereby prolonging the service life of the lamp tube.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A high luminous efficiency LED fluorescent tube with novel heat dissipation structure, comprising a heat dissipation pipe and a lampshade, clamping grooves are formed at both ends of the inside of the heat dissipation pipe, a PCB board is arranged in the inside of the clamping groove, a plurality of LED light sources are fixed at the lower end of the PCB board, and the plurality of LED light sources are arranged equally, a moving plate is arranged in the inside of the clamping groove and at the lower end of the PCB board, a plurality of limiting plates are fixed on the side of the moving plate away from the PCB board, a limiting groove is formed in the inside of the heat dissipation pipe and at one side of the clamping groove, the limiting plate and the limiting groove are matched, and a plurality of memory metals are fixed at the lower end of the moving plate in the inside of the heat dissipation pipe.

[0007] In an preferred scheme, a heat dissipation plate is fixed at the upper end of the PCB board in the inside of the heat dissipation pipe, and a plurality of heat dissipation fins are arranged uniformly at the upper end of the heat dissipation plate.

[0008] In a preferred embodiment, the upper end of the heat dissipation plate and one side of the heat dissipation fins are equipped with a fan.

[0009] In a preferred embodiment, one end of the heat dissipation pipe is fixed with a controller, and the controller is located at the upper end of the heat dissipation plate.

[0010] In a preferred embodiment, the inside of the heat dissipation pipe is fixed with a temperature sensor, and the temperature sensor is located at one side of the controller.

[0011] In a preferred embodiment, both sides of the lampshade are fixed with connecting pieces, the side away from the lampshade of the connecting piece is equipped with an end cover, and both ends of the inside of the connecting piece are provided with through holes.

[0012] The technical effects achieved by the present application are as follows:

[0013] The memory metal is triggered by temperature to push the PCB board and the heat dissipation plate into close contact, the heat conduction and heat radiation of the heat dissipation plate and the heat dissipation fins are combined, the fan works under precise temperature control, the through holes of the connecting pieces form stable air circulation, the heat dissipation efficiency of the LED fluorescent tube is significantly improved, the LED light source and the PCB board are effectively guaranteed to work stably and continuously under suitable temperature environment, and the service life of the lamp tube is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the whole application;

[0015] Figure 2 It is a schematic structural diagram of the inside of the heat dissipation pipe of the application;

[0016] Figure 3 It is a schematic structural bottom view of the inside of the heat dissipation pipe of the application;

[0017] Figure 4 It is a schematic structural diagram of the inside of the moving plate and the limiting groove of the application;

[0018] Figure 5 It is a schematic structural diagram of the application Figure 4 It is a local enlarged schematic diagram of A in the application.

[0019] Figure 6 It is a schematic structural diagram of the end cover of the application.

[0020] In the drawings, the components represented by each reference numeral are listed as follows:

[0021] 10, heat pipe; 11, lampshade; 12, clamping groove; 13, PCB board; 14, LED light source; 15, moving plate; 16, limiting plate; 17, limiting groove; 18, memory metal; 20, heat dissipation plate; 21, heat dissipation fin; 22, fan; 23, controller; 24, temperature sensor; 25, connecting piece; 26, end cover; 27, through hole. DETAILED DESCRIPTION

[0022] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0023] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the spirit of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0024] Secondly, "one embodiment" or "embodiment" referred to herein means that a specific feature, structure or characteristic can be included in at least one implementation of the present application. "In a preferred embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent or alternative to other embodiments.

[0025] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual manufacture.

[0026] Please refer to the accompanying Figures 1 to 5 As shown in the accompanying drawings, the present application provides a high light efficiency LED daylight lamp tube with a novel heat dissipation structure, which comprises a heat pipe 10 and a lampshade 11, two ends of the heat pipe 10 are provided with clamping grooves 12 inside, the clamping grooves 12 are provided with PCB boards 13 inside, the lower end of the PCB board 13 is fixed with a plurality of LED light sources 14, and the plurality of LED light sources 14 are arranged equally, the inside of the clamping groove 12 and the lower end of the PCB board 13 are provided with a moving plate 15, the side of the moving plate 15 away from the PCB board 13 is fixed with a plurality of limiting plates 16, the inside of the heat pipe 10 and one side of the clamping groove 12 are provided with limiting grooves 17, and the limiting plate 16 and the limiting groove 17 are matched, and the inside of the heat pipe 10 and the lower end of the moving plate 15 are fixed with a plurality of memory metals 18.

[0027] In this embodiment, when the LED fluorescent tube is working normally, the lower end of the PCB 13 is fixed with a plurality of LED light sources 14 which will emit light, at this time the PCB 13 as a circuit carrier will generate heat due to current passing and other reasons. The temperature of the PCB 13 gradually rises, when the temperature inside the heat dissipation pipe 10 exceeds 30℃, the memory metal 18 inside the heat dissipation pipe 10 at the lower end of the moving plate 15 is sensed, the memory metal 18 starts to stretch and deform, the deformation of the memory metal 18 will generate an upward thrust acting on the moving plate 15, so that the moving plate 15 starts to move upward, and because the side of the moving plate 15 away from the PCB 13 is fixed with a plurality of limiting plates 16, and the inside of the heat dissipation pipe 10 is provided with a limiting groove 17 on one side of the clamping groove 12, the limiting plate 16 is slidingly connected in the limiting groove 17, so that the moving plate 15 can only move stably along the direction defined by the limiting groove 17, avoiding deviation or shaking during movement, which plays a certain guiding role in the movement of the moving plate 15, and because the PCB 13 is clamped with the heat dissipation pipe 10 through the clamping groove 12, when the moving plate 15 moves upward, it will drive the PCB 13 connected thereto to move upward synchronously, and as the position of the PCB 13 rises, the distance between the PCB 13 and the heat dissipation plate 20 gradually shortens, the PCB 13 moves upward until it can better contact with the heat dissipation plate 20. The heat dissipation plate 20 as an important heat dissipation component has good heat conduction performance. When the PCB 13 contacts with it, the heat originally gathered on the PCB 13 can be quickly conducted to the heat dissipation plate 20 through the contact interface. The upper end of the heat dissipation plate 20 is fixed with a heat dissipation fin 21, which greatly improves the heat dissipation efficiency by increasing the heat dissipation area, and the heat is transferred from the heat dissipation plate 20 to the heat dissipation fin 21, which can be more quickly dissipated to the surrounding air, thereby realizing effective dissipation of the heat generated during the working process of the LED fluorescent tube, ensuring that the LED light source 14 and the PCB 13 can continuously and stably work in a suitable temperature environment.

[0028] It should be noted that the memory metal 18 is a shape memory alloy, in which the transformation temperature generally refers to the critical temperature at which the alloy changes from one form to another. For example, a nickel-titanium memory alloy can be shaped into any shape at a certain temperature, but when the temperature rises to a certain value (such as 40 degrees Celsius), it will quickly return to the original shape. The memory metal 18 has a unique shape memory characteristic, and its phase change temperature is set to 30°C. When the temperature in the heat dissipation pipe 10 rises due to the operation of the LED light source 14 and other factors, once it exceeds the threshold of 30°C, the memory metal 18 will change from the martensite structure at low temperature to the austenite structure. During this phase change, the memory metal 18 is elongated and deformed, thereby pushing the moving plate 15 located above it upwards. One end of the memory metal 18 is firmly fixed to the heat dissipation pipe 10, and the other end is connected to the moving plate 15. When the temperature rises and triggers the phase change, the fixed end cannot move because it is closely connected to the heat dissipation pipe 10, but the end connected to the moving plate 15 will be lifted upwards under the action of the deformation force, pushing the moving plate 15 and thereby moving the PCB board 13. The elongation of the memory metal 18 can tightly connect the heat dissipation pipe 10 and the PCB board 13, achieving the heat dissipation function. When the heat dissipation pipe 10 and the PCB board 13 are tightly connected, the memory metal 18 is elongated to the maximum state, and preferably, the memory metal 18 has anti-fatigue properties.

[0029] In a preferred embodiment, referring to Figure 4 , the inside of the heat dissipation pipe 10 and the upper end of the PCB board 13 are fixed with a heat dissipation plate 20, and the upper end of the heat dissipation plate 20 is uniformly provided with a plurality of heat dissipation fins 21.

[0030] In this embodiment, the temperature of the PCB board 13 rises due to the operation of the LED light source 14, and the temperature inside the heat dissipation pipe 10 rises, which can make the heat of the PCB board 13 transferred to the heat dissipation plate 20 in close contact with it through heat conduction by the memory metal 18. The heat dissipation plate 20 is usually made of high thermal conductivity materials such as copper or aluminum alloy. Taking copper as an example, it has high thermal conductivity and can quickly absorb and transfer the heat on the PCB board 13 to its own interior, and the heat quickly flows from the high-temperature PCB board 13 to the relatively low-temperature heat dissipation plate 20, achieving the initial transfer of heat. Again, because the upper end of the heat dissipation plate 20 is uniformly provided with a plurality of heat dissipation fins 21, when the surrounding air comes into contact with the heat dissipation fins 21, the heat dissipation fins 21 radiate heat to the surrounding environment due to their higher temperature than the surrounding air, further improving the heat dissipation efficiency.

[0031] Secondly, referring again to Figure 3 , the upper end of the heat dissipation plate 20 and one side of the heat dissipation fins 21 are equipped with a fan 22, one end inside the heat dissipation pipe 10 is fixed with a controller 23, and the controller 23 is located at the upper end of the heat dissipation plate 20. The inside of the heat dissipation pipe 10 is fixed with a temperature sensor 24, and the temperature sensor 24 is located on one side of the controller 23.

[0032] In this embodiment, the temperature sensor 24 is fixed inside the heat dissipation tube 10 and located at the side of the controller 23, which can monitor the temperature inside the lamp tube, and the temperature sensor 24 adopts a high-precision thermistor which can convert temperature changes into electrical signal changes. The controller 23 is located at the upper end of the heat dissipation plate 20, which receives the temperature signal transmitted by the temperature sensor 24 and compares it with the preset temperature threshold. This preset temperature threshold (such as 45℃) is determined according to the optimal working temperature range of the LED daylight lamp tube and the natural heat dissipation capacity and other factors. When the temperature signal received by the controller 23 shows that the current temperature exceeds the preset threshold, the driving signal output by the controller 23 reaches the fan 22, and the fan 22 starts to work, the blades push the air, and a negative pressure area is formed behind the fan 22, the surrounding air is attracted by the negative pressure and flows quickly to the fan 22 and directly through the heat dissipation fins 21, further improving the heat dissipation efficiency.

[0033] It should be noted that the controller 23 and the fan 22 and the temperature sensor 24 and the controller 23 are electrically connected through wires.

[0034] In a preferred embodiment, please refer to Figure 1 and Figure 5 The two sides of the lampshade 11 are fixed with connecting pieces 25, and the side away from the lampshade 11 is equipped with an end cover 26, and the two ends inside the connecting piece 25 are provided with through holes 27.

[0035] It should be noted that the end cover 26 is usually provided with a terminal or a slot inside for safe connection of the external power supply and the driving circuit inside the heat dissipation tube 10, and at the same time, it isolates the external moisture, dust and other erosions to the electrical elements. The specific structure and working mode are prior art and will not be described here.

[0036] In this embodiment, the two ends inside the connecting piece 25 are provided with through holes 27, the through holes 27 at both ends are through the inside of the heat dissipation tube 10, and one end of the through holes 27 at both ends can be an air inlet, and the other end can act as an air outlet, which provides sufficient cold air source for the fan 22, so that the air can flow in and out smoothly, and ensures that the air flow generated by the fan 22 can stably flow through the heat dissipation fins 21, improving the continuity and efficiency of heat exchange. It should be noted that the through holes 27 inside the connecting piece 25 are inclined downward from the middle of the connecting piece 25, and the connecting piece 25 is also provided with a wire hole.

[0037] The working principle of the utility model is:

[0038] The temperature sensor 24 monitors the temperature in the heat dissipation pipe 10 in real time. When the LED light source 14 emits light and the PCB board 13 generates heat to make the temperature in the heat dissipation pipe 10 exceed 30℃, the memory metal 18 starts to transform, the memory metal 18 is elongated and deformed to push the moving plate 15, drives the PCB board 13 to move upward and better contact with the heat dissipation plate 20, the heat is conducted from the PCB board 13 to the heat dissipation plate 20, the heat dissipation plate 20 preliminarily shifts the heat by heat conduction, the heat dissipation fins 21 on the upper end of the heat dissipation plate 20 radiate heat to the surrounding, when the temperature in the heat dissipation pipe 10 exceeds the preset threshold value (such as 45℃), the controller 23 outputs a driving signal to the fan 22. After the fan 22 is started, the blades rotate to form a negative pressure area at the back, inhale air to flow through the heat dissipation fins 21, strengthen heat dissipation, the through hole 27 in the connecting piece 25 provides cold air for the fan 22, guarantees the stable airflow through the heat dissipation fins 21, improves the heat exchange efficiency.

[0039] The above only describes the preferred embodiments of the present application, it should be noted that for those skilled in the art, without departing from the principle of the present application, can make several improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as no special description and limitation, are implemented according to the conventional means in the field.

Claims

1. A high-efficiency LED fluorescent tube with a novel heat dissipation structure, comprising a heat dissipation tube (10) and a lampshade (11), characterized in that: The heat sink (10) has slots (12) at both ends inside. A PCB board (13) is installed inside the slot (12). Multiple LED light sources (14) are fixed at the lower end of the PCB board (13) and are arranged equally. A movable plate (15) is installed inside the slot (12) and at the lower end of the PCB board (13). Multiple limiting plates (16) are fixed on the side of the movable plate (15) away from the PCB board (13). A limiting groove (17) is opened inside the heat sink (10) and on the side of the slot (12). The limiting plate (16) and the limiting groove (17) are compatible. Multiple memory metals (18) are fixed inside the heat sink (10) and at the lower end of the movable plate (15).

2. A high-efficiency LED fluorescent tube with a novel heat dissipation structure according to claim 1, characterized in that: A heat sink (20) is fixed inside the heat sink (10) and at the upper end of the PCB board (13). A plurality of heat sink fins (21) are evenly arranged on the upper end of the heat sink (20).

3. A high-efficiency LED fluorescent tube with a novel heat dissipation structure according to claim 2, characterized in that: A fan (22) is mounted on the upper end of the heat sink (20) and on one side of the heat sink fins (21).

4. A high-efficiency LED fluorescent tube with a novel heat dissipation structure according to claim 1, characterized in that: A controller (23) is fixed at one end inside the heat pipe (10), and the controller (23) is located at the upper end of the heat sink (20).

5. A high-efficiency LED fluorescent tube with a novel heat dissipation structure according to claim 1, characterized in that: A temperature sensor (24) is fixed inside the heat sink (10), and the temperature sensor (24) is located on one side of the controller (23).

6. A high-efficiency LED fluorescent tube with a novel heat dissipation structure according to claim 1, characterized in that: Both sides of the lampshade (11) are fixed with connectors (25), and the side of the connector (25) away from the lampshade (11) is fitted with an end cap (26). Both ends of the connector (25) are provided with through holes (27).

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