A heat dissipating R7S lamp

Abstract

The utility model discloses a heat dissipation type R7S lamp relates to the technical field of lighting lamps and lanterns, including light source board, light source board is hollow cylinder, is set on the outer peripheral surface of radiator and contacts, and the both ends of radiator are equipped with the heat conduction cover respectively, and the both ends of lamp shade are equipped with the end cover, and the heat conduction cover is bonded with the end cover, the end of heat conduction cover is wrapped up radiator, and a plurality of heat conduction grooves are equipped on the end cover, and the convection heat dissipation cavity is equipped between lamp shade and light source board and the end cover. The utility model discloses a convection heat dissipation cavity is set up, makes the light source board surface form heat dissipation air channel, effectively improves the heat dissipation effect, and optimizes the heat conduction path.

Description

Technical Field

[0001] This utility model relates to the field of lighting fixtures, specifically to a heat dissipation type R7S lamp. Background Technology

[0002] Existing R7S lamps have relatively simple heat dissipation structures, mostly relying solely on heat sinks or heat sink housings for heat dissipation. While this design can conduct some heat to the external environment, the limited area of ​​the heat sink and its relatively small contact area with air result in low heat dissipation efficiency. At high power output, heat is difficult to dissipate quickly and effectively, easily causing the internal temperature of the lamp body to rise. Although heat sink housings offer some protection, their heat dissipation performance is also limited, and dust easily accumulates on their surface during prolonged use, further hindering heat dissipation.

[0003] Chinese Patent Publication No. CN213065615U, Publication Date: September 15, 2020, discloses a Chinese patent entitled "An R7S Lamp," which includes a glass lamp tube, two external AC-connected electrodes, a light source composed of an LED substrate and LEDs disposed inside the glass lamp tube, a circuit board mounting component fixed inside the glass lamp tube, and a circuit board fixed inside the circuit board mounting component; the circuit board is provided with a driving circuit with rectification and filtering functions, the driving circuit including a rectifier bridge, a driving chip, an electrolytic capacitor, and a resistor; two limiting protrusions are provided on each side of the glass lamp tube, and an electrode mounting post for mounting the electrode extension from inside the glass lamp tube is provided between the two limiting protrusions. This R7S lamp does not have a heat dissipation structure, and the internal temperature of the lamp body is easily raised when the power output is high. Utility Model Content

[0004] This invention provides a heat-dissipating R7S lamp. By setting up a convection heat dissipation cavity, a heat dissipation channel is formed on the surface of the light source board, which improves the heat dissipation effect and optimizes the heat conduction path.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heat dissipation type R7S lamp, including a light source plate, which is a hollow cylindrical shape, fitted onto and in contact with the outer circumferential surface of the heat sink, with heat-conducting covers at both ends of the heat sink, and end caps at both ends of the lamp cover, the heat-conducting covers being bonded to the end caps; the heat-conducting covers wrap around the ends of the heat sink, the end caps having several heat-conducting grooves, and a convection heat dissipation cavity being provided between the lamp cover and the light source plate and the end caps.

[0006] Preferably, the heat sink is a hollow cylindrical shape with a PCB board inside. The light source board, as the light source, has a flexible substrate that can be bent to a certain extent; the heat sink serves as the heat dissipation structure and the support for the light source board. The inner diameter of the heat sink is slightly larger than the outer diameter of the light source board. The outer surface of the heat sink is in contact with the inner surface of the light source board. The heat generated by the light source board is dissipated directly through the convection cooling cavity, and then transferred to the heat sink. The end of the heat sink contacts the heat-conducting cover, transferring heat to it. The heat-conducting cover then directly transfers the heat to the end cover, which conducts part of the heat directly to the outside and the other part is dissipated through the convection cooling cavity. This structural design allows the heat sink to fully perform its heat dissipation and load-bearing functions. Through the close contact between the heat sink and the light source board, and the multiple heat dissipation paths provided by the heat sink, heat dissipation efficiency is effectively improved, heat accumulation in critical parts is reduced, the temperature of the light source board is further reduced, and the lifespan of the lamp is extended.

[0007] Preferably, the end of the lampshade is positioned within the heat-conducting groove, without contacting the groove wall. The heat-conducting groove is stepped, with two grooves on each end cap. The higher step of the groove is located at the top, forming a heat-conducting hole between it and the lampshade. This structural design not only increases the heat dissipation area but also optimizes the heat conduction path through the heat-conducting hole, allowing heat to dissipate more quickly from the end of the lampshade, further improving the heat dissipation effect.

[0008] Preferably, several heat-conducting grooves are arranged on the outer peripheral surface of the end cap, extending to the bottom end of the end cap. The end cap is a stepped cylinder with one open end. This design allows heat to be distributed more evenly across the entire end cap, improving heat dissipation efficiency and enhancing the structural stability of the end cap.

[0009] Preferably, the top of the end cap has an extension facing outward, and the extension forms a heat-conducting hole with the end of the lampshade. The higher-level portion of the heat-conducting groove is located at the bottom of the extension. The heat-conducting hole serves not only as a heat-conducting component but also as a channel for connecting the circuit. Through the design of the extension and the heat-conducting hole, not only is the heat conduction path optimized, but the convenience of circuit connection is also achieved, assembly steps are reduced, and production efficiency is improved.

[0010] Preferably, the heat-conducting cover is in contact with the end cover, and the end cover, heat-conducting cover, and lampshade are bonded together with adhesive. Assembly is screwless, enabling simple installation. The lampshade uses transparent PC material to protect the internal light source and circuit components, as well as its light-transmitting properties. The screwless assembly method simplifies the installation process, improves production efficiency, and reduces production costs. The transparent PC lampshade not only protects the internal components but also ensures good light transmission, improving the lighting effect.

[0011] Preferably, the light source board is equipped with several LED beads. The use of LED beads improves the luminous efficiency of the light source while reducing energy consumption, meeting the requirements of energy conservation and environmental protection.

[0012] Preferably, heat-conducting holes are provided at both ends of the convection cooling cavity. This forms a convection cooling channel on the surface of the light source board, improving the heat dissipation effect. By providing heat-conducting holes at both ends of the convection cooling cavity, a complete convection cooling channel is formed, further improving heat dissipation efficiency, reducing the temperature of the light source board, and extending the lamp's lifespan.

[0013] Preferably, both ends of the heat sink are in contact with the inner wall of the heat-conducting cover. The heat sink transfers heat to the heat-conducting cover through its ends, and the heat-conducting cover then transfers heat to the end caps through contact. This contact-type heat dissipation path design ensures that heat can be transferred quickly and effectively from the heat sink to the end caps, further optimizing the heat conduction path and improving heat dissipation efficiency.

[0014] Preferably, the LED beads are housed within a convection cooling cavity. This placement allows heat to be directly dissipated through the cavity, reducing heat buildup around the beads, improving heat dissipation, and extending the lifespan of the LED beads.

[0015] Beneficial effects: This invention, by setting up a convection heat dissipation cavity, creates heat dissipation channels on the surface of the light source board, effectively improving heat dissipation and optimizing the heat conduction path, thereby significantly reducing the temperature of the light source board. This not only extends the lifespan of the R7S lamp but also reduces light decay and color temperature changes, improving the stability and reliability of the lighting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of this utility model without the lampshade.

[0019] Reference numerals: 1: End cap; 1.1: Heat conduction groove; 1.2: Extension; 1.3: Heat conduction hole; 2: Lamp cover; 3: Heat conduction cover; 4: Convection heat dissipation cavity; 5: PCB board; 6: Heat sink; 7: Light source board; 8: LED lamp bead. Detailed Implementation

[0020] The heat-dissipating R7S lamp provided by this utility model constructs a dual heat dissipation system of "contact heat conduction + convection heat dissipation" through the coordinated design of the light source plate 7, heat sink 6, heat conduction cover 3, end cover 1 and lamp cover 2, which effectively solves the problems of poor heat dissipation and easy light source decay due to high temperature in traditional R7S lamps.

[0021] like Figure 1 and Figure 2In the illustrated embodiment, the heat-dissipating R7S lamp uses a light source plate 7 as its core light-emitting component. The light source plate 7 is designed as a hollow cylindrical shape, which allows it to fit tightly onto the outer circumference of the heat sink 6 and make full contact with it. The substrate of the light source plate 7 has a certain degree of flexibility and can be slightly bent, ensuring a tight fit with the outer surface of the heat sink 6 during assembly, reducing contact gaps. Excessive gaps would create thermal resistance, hindering heat transfer, while tight contact allows the heat generated by the light source plate 7 during operation to be quickly conducted to the heat sink 6. The heat sink 6 is also a hollow cylindrical shape, serving not only as a heat dissipation structure but also as a support for the light source plate 7. Its inner diameter is slightly larger than the outer diameter of the light source plate 7, which facilitates the fitting and assembly of the light source plate 7 while maximizing the contact area between the two.

[0022] exist Figure 2 In the preferred embodiment shown, a PCB board 5 is housed within the hollow structure of the heat sink 6. The PCB board 5 provides circuit support for the light source board 7, and the small amount of heat generated by the PCB board itself can be transferred away through contact with the inner wall of the heat sink 6, preventing localized heat accumulation. Heat-conducting covers 3 are provided at both ends of the heat sink 6. The heat-conducting covers 3 are made of a material with high thermal conductivity, completely enclosing the ends of the heat sink 6 and forming a tight contact. When the heat sink 6 absorbs heat from the light source board 7, some of the heat is directly dissipated into the air through the convection cooling cavity 4, while the other part is transferred to the heat-conducting covers 3 through the ends. The heat-conducting covers 3 are fixed to the end caps 1 by adhesive bonding. This connection ensures structural stability and allows the heat-conducting covers 3 to directly transfer heat to the end caps 1, achieving further heat conduction.

[0023] exist Figure 2 In the preferred embodiment shown, the lampshade 2 has end caps 1 at both ends. The end caps 1 and the heat-conducting cover 3 are bonded together to form a closed lamp body structure. A convection cooling cavity 4 is reserved between the lampshade 2, the light source plate 7, and the end caps 1. The convection cooling cavity 4 is a key channel for airflow. When the lamp body is working, the internal air is heated and rises, while external cool air enters from the bottom of the cavity, forming natural convection. This convection carries the heat from the heat sink 6 and the surface of the light source plate 7 out of the lamp body, achieving efficient heat dissipation. This convection design eliminates the need for additional active cooling components such as fans, reducing energy consumption and the risk of mechanical failure, making it suitable for the compact structure requirements of the R7S lamp.

[0024] exist Figure 2 and Figure 3In the preferred embodiment shown, the structural design of the end cap 1 further optimizes the heat dissipation path. The end cap 1 has several heat-conducting grooves 1.1, which are evenly distributed on the outer circumferential surface of the end cap 1 and extend to the bottom end of the end cap 1. The end cap 1 is generally a stepped cylinder with one open end. This stepped cylindrical structure not only enhances the structural stability of the end cap 1 but also provides a positioning reference for the assembly of the lampshade 2 and the heat-conducting cover 3, ensuring precise positional relationships between the components. This allows a convection heat dissipation cavity 4 to be formed between the lampshade 2 and the light source board 7, and the inner wall surface of the end of the lampshade 2 is bonded to the outer circumferential surface of the lower-step portion of the end cap 1.

[0025] exist Figure 2 In the preferred embodiment shown, the end of the lampshade 2 is disposed within the heat-conducting groove 1.1 and does not contact the wall of the heat-conducting groove 1.1. This non-contact design avoids thermal resistance interference between the lampshade 2 and the end cap 1. If there is direct contact, the heat of the lampshade 2 may accumulate due to poor contact. The non-contact method allows the heat on the surface of the lampshade 2 to be directly dissipated through the convection heat dissipation cavity 4. At the same time, the stepped structure of the heat-conducting groove 1.1 (the higher step is located at the top) forms heat-conducting holes 1.3 between it and the lampshade 2. The heat-conducting holes 1.3 disposed at both ends of the convection heat dissipation cavity 4 form convection heat dissipation channels on the surface of the light source plate 7. Through the convection heat channels, the heat dissipation efficiency is significantly improved.

[0026] exist Figure 2 In the preferred embodiment shown, the synergistic effect of the heat dissipation system is clear and efficient during actual operation. The heat generated by the light source board 7 when it is powered on is released directly into the convection heat dissipation cavity 4 by expanding the heat dissipation area through its hollow cylindrical structure, and carried out of the lamp body by air convection. On the other hand, it is transferred to the heat sink 6 through close contact with the heat-conducting cover 3. The end of the heat sink 6 contacts the heat-conducting cover 3, and after transferring the heat to the heat-conducting cover 3, the heat-conducting cover 3 conducts the heat to the end cover 1 through the bonding surface. The end cover 1 then disperses the heat to a larger area through the heat-conducting grooves 1.1 on its outer periphery. Some of the heat is directly dissipated into the air, and the other part cooperates with the convection heat dissipation cavity 4 through the heat-conducting holes 1.3 to accelerate the heat dissipation. At the same time, the small amount of heat generated by the PCB board 5 is also conducted through the inner wall of the heat sink 6 and integrated into the overall heat dissipation system to avoid local overheating. This structural design allows the heat sink 6 to fully perform its heat dissipation and load-bearing functions. Through the close contact between the heat sink 6 and the light source board 7, as well as the multiple heat dissipation paths of the heat sink 6, the heat dissipation efficiency is effectively improved, the accumulation of heat in key parts is reduced, the temperature of the light source board 7 is further reduced, and the service life of the lamp is extended.

[0027] The advantages of this multi-path heat dissipation design are particularly evident during prolonged use. Traditional R7S lamps often suffer from accelerated light decay and shortened lifespan due to heat accumulation on the light source board 7. However, this design utilizes direct heat conduction from the light source board 7 to the heat sink 6, indirect heat conduction from the heat sink 6 to the heat-conducting cover 3 to the end cover 1, and air convection in the convection heat dissipation cavity 4 to effectively reduce the operating temperature of the light source board 7. For example, during high-power operation, the heat generated by the light source board 7 can be dissipated quickly through multiple paths, preventing the temperature from continuously rising. Even in enclosed or poorly ventilated environments, the convection heat dissipation cavity 4 can still achieve basic heat dissipation through limited airflow, ensuring stable operation of the lamp.

[0028] The structural design of each component also takes into account both ease of assembly and reliability. The soft base material of the light source board 7 facilitates fitting and assembly, and the size matching between the heat sink 6 and the light source board 7 ensures tight contact. The design of the heat-conducting cover 3 wrapping around the end of the heat sink 6 not only enhances the heat conduction effect but also protects the structure of the end of the heat sink 6. The stepped shape of the end cover 1 and the design of the heat-conducting groove 1.1 improve heat dissipation while simplifying the positioning and installation of the lampshade 2. The heat-conducting hole 1.3 formed by the heat-conducting groove 1.1 and the lampshade 2 does not require additional processing and is naturally formed through assembly, reducing production difficulty.

[0029] This invention constructs a highly efficient heat dissipation system through the close contact between the hollow cylindrical light source plate 7 and the heat sink 6, the heat conduction transfer between the heat-conducting cover 3 and the end cover 1, the airflow in the convection heat dissipation cavity 4, and the auxiliary heat dissipation of the heat-conducting groove 1.1 and heat-conducting hole 1.3 on the end cover 1. This design optimizes the heat conduction path, expands the heat dissipation area, reduces heat accumulation, significantly improves the heat dissipation effect of the R7S lamp, extends the life of the light source, and provides a reliable guarantee for the stable operation of high-power R7S lamps.

[0030] exist Figure 1 and Figure 2 In the preferred embodiment shown, the top of the end cap 1 has an extension 1.2 facing outward. The extension 1.2 protrudes outward in a ring shape, naturally forming a heat-conducting hole 1.3 between it and the end of the lampshade 2. The higher part of the heat-conducting groove 1.1 is located precisely at the bottom of the extension 1.2. This structure allows the heat-conducting hole 1.3 and the heat-conducting groove 1.1 to form a connected heat dissipation channel. The heat-conducting hole 1.3 not only performs the function of heat conduction but also serves as a channel for connecting the circuit. That is, the wires inside the lamp body can pass through the heat-conducting hole 1.3 to connect to the external power supply without the need for additional wiring holes. This simplifies the structural design and avoids compromising the heat dissipation integrity of the end cap 1 due to additional openings. The design of the extension 1.2 increases the contact area between the end cap 1 and the air. When heat is transferred to the extension 1.2, it can be quickly dissipated through its surface. At the same time, the extension 1.2 provides more stable support for the lampshade 2, preventing the lampshade 2 from shifting during assembly or use, ensuring the spatial dimension of the heat-conducting hole 1.3 is stable, and not affecting airflow and circuit connection.

[0031] The heat-conducting cover 3 is in close contact with the end cover 1, and the three (end cover 1, heat-conducting cover 3, and lampshade 2) are fixed together with adhesive, achieving screwless assembly. Traditional lamps often rely on screws for connection, which not only increases the number of parts but also requires screw holes in the components, affecting the heat dissipation area and prolonging the assembly time. This design, however, uses adhesive to directly fix the heat-conducting cover 3 to the end cover 1 and the lampshade 2 to the end cover 1. The assembly process requires no tools; only positioning fixtures are needed to ensure the accurate position of each component before applying adhesive. This greatly simplifies the installation steps, improves production efficiency, and reduces the risk of structural instability due to loose screws. The lampshade 2 is made of transparent PC (polycarbonate), a material that combines high strength and high light transmittance. It effectively protects the internal light source board 7, LED beads 8, and circuit components from dust, moisture intrusion, or damage from external impacts, while maximizing light transmission and avoiding attenuation of lighting effect due to insufficient light transmittance, ensuring the luminous efficiency of the R7S lamp.

[0032] exist Figure 1 In the preferred embodiment shown, both ends of the convection cooling cavity 4 are provided with heat-conducting holes 1.3, which correspond to the heat-conducting holes 1.3 formed by the extension 1.2 of the end cover 1 and the lampshade 2, thus constructing a complete convection cooling air channel. When the lamp body is working, the air in the convection cooling cavity 4 becomes less dense after being heated, and rises and is discharged from the heat-conducting holes 1.3 at the top of the cavity; while the cooler external air enters from the heat-conducting holes 1.3 at the bottom of the cavity, replenishing the cavity and forming continuous natural convection. This air channel design with both ends open allows the air to flow more smoothly in the cavity, which can quickly remove the heat transferred from the surface of the light source board 7, the LED beads 8 and the heat sink 6, and prevent heat from stagnating in the cavity. At the same time, the convection cooling air channel can also guide the heat to diffuse to the end cover 1 and the heat-conducting cover 3, forming a dual heat dissipation effect of "convection + conduction" in combination with the contact heat dissipation path, significantly reducing the overall temperature of the light source board 7.

[0033] exist Figure 2In the preferred embodiment shown, the two ends of the heat sink 6 are in close contact with the inner wall of the heat-conducting cover 3. This full-contact design ensures efficient heat transfer. After absorbing heat from the light source plate 7, the heat sink 6 not only dissipates heat to the convection cooling cavity 4 through its own surface, but also transfers heat to the heat-conducting cover 3 through its end faces. Due to the large contact area and small gap between the two, the thermal resistance is extremely low, and heat can be quickly conducted from the heat sink 6 to the heat-conducting cover 3. The heat-conducting cover 3 itself is made of a highly thermally conductive material. After absorbing heat, it transfers heat to the end cover 1 through close contact with it. Finally, the heat is dissipated to the external environment by the end cover 1 through the outer heat-conducting groove 1.1 and the extension 1.2. This contact-type heat dissipation path of the heat sink 6, the heat-conducting cover 3, and the end cover 1 forms an efficient heat conduction channel, which complements the convection cooling air channel, further optimizing the heat conduction path and preventing heat accumulation at the ends of the heat sink 6.

[0034] In actual operation, the collaborative heat dissipation mechanism of each component is clear and efficient. The heat generated by the LED beads 8 when powered on is partially dissipated through air convection within the convection cooling chamber 4; the remaining heat is transferred to the light source board 7, and then further transferred to the heat sink 6 through contact between the light source board 7 and the heat sink 6. The heat sink 6 transfers the heat to the heat-conducting cover 3 at its end, which then conducts the heat to the end cover 1. The end cover 1 then rapidly dissipates the heat into the air through the heat-conducting grooves 1.1 on its outer periphery, the extension 1.2, and the heat-conducting holes 1.3 at both ends. Simultaneously, the transparent PC lampshade 2 protects the internal components while not obstructing heat diffusion through the convection cooling chamber 4 and the heat-conducting holes 1.3, ensuring that the heat dissipation process is not affected.

[0035] The screwless assembly method demonstrates significant advantages in the production process. During assembly, simply fit the heat sink 6 onto the light source board 7, place the heat-conducting cover 3 on both ends of the heat sink 6, and then glue the lampshade 2 and end cap 1 to the ends of the heat-conducting cover 3 and lampshade 2 respectively. The entire process requires no screws, significantly shortening assembly time and reducing easily damaged parts such as screws, thereby lowering production costs and subsequent maintenance risks. The high light transmittance of the transparent PC lampshade 2 ensures that the light emitted by the LED beads 8 can be projected evenly and efficiently, avoiding light efficiency loss caused by the material of the lampshade 2 and improving the lighting effect.

[0036] This invention constructs a complete convection airflow channel through the extension 1.2 of the end cap 1 and the heat conduction hole 1.3, simplifies production by eliminating screws in the assembly process, and shortens the heat dissipation path by placing the LED beads 8 inside the heat dissipation cavity. Combined with the contact heat dissipation of the heat sink 6, the heat conduction cover 3, and the end cap 1, it forms a highly efficient and convenient heat dissipation and assembly system. This design not only significantly improves the heat dissipation effect of the R7S lamp and extends its service life, but also optimizes the production process, ensures lighting stability, and provides a reliable guarantee for the application of high-performance R7S lamps.

Claims

1. A heat-dissipating R7S lamp, characterized in that, Includes a light source board, which is a hollow cylindrical shape, fitted onto and in contact with the outer circumference of the heat sink, with heat-conducting covers at both ends of the heat sink and end caps at both ends of the lamp cover, the heat-conducting covers being bonded to the end caps; The heat-conducting cover wraps around the end of the heat sink, and the end cover has several heat-conducting grooves. A convection heat dissipation cavity is provided between the lampshade and the light source board and the end cover.

2. The heat-dissipating R7S lamp according to claim 1, characterized in that, The heat sink is a hollow cylindrical shape with a PCB board inside.

3. The heat-dissipating R7S lamp according to claim 1, characterized in that, The end of the lampshade is set inside the heat-conducting groove and does not contact the wall of the heat-conducting groove.

4. A heat-dissipating R7S lamp according to claim 1 or 3, characterized in that, Several heat-conducting grooves are provided on the outer circumferential surface of the end cap, extending to the bottom of the end cap.

5. A heat-dissipating R7S lamp according to claim 1 or 3, characterized in that, The top of the end cap has an extension facing outward, and the extension forms a heat conduction hole with the end of the lampshade.

6. A heat-dissipating R7S lamp according to claim 1, characterized in that, The heat-conducting cover is in contact with the end cover, and the end cover, heat-conducting cover, and lamp cover are bonded together with adhesive.

7. A heat-dissipating R7S lamp according to claim 6, characterized in that, The light source board has several LED beads.

8. A heat-dissipating R7S lamp according to claim 5, characterized in that, Both ends of the convection cooling cavity are equipped with heat conduction holes.

9. A heat-dissipating R7S lamp according to claim 2, characterized in that, The two ends of the radiator are in contact with the inner wall of the heat-conducting cover.

10. A heat-dissipating R7S lamp according to claim 8, characterized in that, The LED beads are placed inside the convection heat dissipation cavity.

Images