Heat dissipation device of lamp body, lamp assembly and vehicle

Abstract

According to the heat dissipation device of the lamp body, the lamp assembly and the vehicle, heat dissipation fins are installed in the circumferential direction of a heat dissipation seat body, the distance between the circumferential direction of the heat dissipation seat body and a lampshade is relatively large, the heat dissipation fins with the larger size and the larger number can be contained, in this way, the heat dissipation area can be increased, and the heat dissipation efficiency is improved. Heat of the lamp body can be quickly dissipated to the surrounding environment, heat accumulation is avoided, and the service life of the lamp body can be prolonged. Moreover, the heat dissipation fins and the heat dissipation seat body are of a split structure, the heat dissipation fins can be plugged into the inner side of the lampshade from the dustproof mounting holes in the lampshade after the heat dissipation seat body and the lamp body are mounted in the lampshade and then assembled to the heat dissipation seat body, and the mounting problem of the heat dissipation fins is solved.

Description

Technical Field

[0001] The present application relates to the field of lighting components, and particularly to a heat dissipation device for a lamp body, a lamp assembly and a vehicle. Background Art

[0002] Most automotive headlights use LED (Light Emitting Diode) lamps. The LED lamps adopt planar cluster packaging technology, which can meet the requirements of high power and low energy consumption. Among them, the chip power density of larger power LED lamps is very high. Due to the current semiconductor manufacturing technology, more than 80% of the input power is converted into heat energy, and only less than 20% is converted into light energy. If the heat of the chip is simply dissipated by proportionally enlarging the package size, it cannot be dissipated, and it is very likely to cause the solder to melt, resulting in the failure of the chip in the light-emitting component. Therefore, fins are usually arranged on the back side of the LED heat sink to increase the heat dissipation area. However, the space on the back side of the heat sink is limited, and the size and quantity of the fins are restricted to a certain extent, thereby limiting the heat dissipation effect of the LED lamp.

[0003] How to improve the heat dissipation effect of LED lamps is one of the main issues that technicians in this field have always been concerned about. Summary of the Utility Model

[0004] The purpose of the present application is to provide a heat dissipation device for a vehicle lamp with a better heat dissipation effect on LED lamps. Another purpose of the present application is to provide a lamp assembly and a vehicle including the heat dissipation device of the above lamp body.

[0005] The present application provides a heat dissipation device for a lamp body, including:

[0006] A heat dissipation base body, provided with an installation structure for cooperating with the lamp body for installation;

[0007] A plurality of heat dissipation fins, which are a split structure with the heat dissipation base body. The heat dissipation fins are assembled on the circumference of the heat dissipation base body, and the heat dissipation fins are thermally conductively connected to the heat dissipation base body.

[0008] During operation, the heat generated by the LED lamp body is conducted to the heat dissipation base body. A part of the heat is dissipated through the heat dissipation base body, and another part of the heat is transferred to the heat dissipation fins through the heat dissipation base body and dissipated through the heat dissipation fins. Compared with the prior art in which the heat dissipation fins are installed on the back side of the heat dissipation block away from the lamp body, in the embodiment of the present application, the heat dissipation fins are installed on the circumference of the heat dissipation base body. The distance between the circumference of the heat dissipation base body and the lamp shade is relatively large, which can accommodate more heat dissipation fins in terms of volume and quantity. This is conducive to increasing the heat dissipation area, quickly dissipating the heat of the lamp body to the surrounding environment, avoiding heat accumulation, and is conducive to improving the service life of the lamp body. Moreover, in the present application, the heat dissipation fins and the heat dissipation base body are of a split structure. The heat dissipation fins can be inserted into the inner side of the lamp shade from the position of the dust-proof installation hole on the lamp shade after the heat dissipation base body and the lamp body are installed inside the lamp shade, and then assembled to the heat dissipation base body, solving the problem of installing the heat dissipation fins.

[0009] In one example, it further includes a heat conduction plate arranged along the circumference of the heat dissipation base body. At least one of the heat dissipation fins is installed on the heat conduction plate. The heat conduction plate is connected to the heat dissipation base body, and the heat dissipation fins are in thermal conduction with the heat dissipation base body through the heat conduction plate.

[0010] In one example, it further includes a limiting component arranged on the heat dissipation base body. The heat conduction plate and the heat dissipation base body are detachably installed through the limiting component.

[0011] In one example, one of the heat dissipation base body and the heat conduction plate is provided with a jack, and the other is provided with a plug. The jack and the plug are inserted and matched. When the plug is inserted into the jack, the limiting component abuts against the plug to limit the plug inside the jack.

[0012] In one example, the end of the heat dissipation base body facing away from the lamp body is provided with a slot. The opening of the slot faces away from the lamp body. The inner edge of the heat conduction plate has a bent edge. The jack is the slot, and the plug is the bent edge.

[0013] In one example, the limiting component includes a limiting block. The limiting block can reciprocate between a first position and a second position relative to the heat dissipation base body. When the limiting block is in the first position, the limiting block abuts against the heat conduction plate to prevent the heat conduction plate from coming out of the slot; when the limiting block is in the second position, the limiting block is separated from the heat conduction plate.

[0014] In one example, the limiting component further includes a spring. The spring is press-fitted between the limiting block and the heat dissipation base body and expands and contracts in the transverse direction. The limiting block reciprocates transversely relative to the heat dissipation base body. Under the elastic force of the spring, the limiting block can be maintained in the first position;

[0015] Alternatively, and / or, the limiting block further has a dialing block, the dialing block extends to the outside of the heat dissipation base body toward the side away from the lamp body, and the dialing block is used to drive the limiting block to move.

[0016] In one example, it further includes a fan, which is installed on the heat dissipation base body, and the air outlet or air inlet of the fan is communicated with the space where the heat dissipation fins are located through a duct provided on the heat dissipation base body.

[0017] In one example, the heat dissipation base body has a mounting through hole, a part of the lamp body is inserted and installed in the mounting through hole, the fan is installed in the mounting through hole and is located on the side of the lamp body away from the light emitting end, and the duct includes a hole penetrating the peripheral wall of the mounting through hole, and the air outlet of the hole on the outer surface of the heat dissipation base body faces the heat dissipation fins.

[0018] In addition, an embodiment of the present application further provides a lamp assembly, including: a lamp body;

[0019] The heat dissipation device of the lamp body according to any one of the above, and the lamp body is cooperatively installed with the installation structure.

[0020] An embodiment of the present application further provides a vehicle, including the above lamp assembly.

[0021] Both the vehicle and the lamp assembly in the embodiments of the present application have the heat dissipation device of the lamp body as described above, so the vehicle and the lamp assembly also have the above technical effects of the heat dissipation device of the lamp body. Description of the Drawings

[0022] Figure 1 It is a cross-sectional view of the heat dissipation device of the lamp body installed in an embodiment of the present application;

[0023] Figure 2 For Figure 1 It is a top view of the assembly structure of the heat dissipation fins and the heat conduction plate in

[0024] Figure 3 For Figure 1 It is an enlarged schematic view of part A in

[0025] Wherein, Figures 1 to 3 The one-to-one correspondence between the reference numerals and the component names in the drawings is as follows:

[0026] 1 Heat dissipation base body; 12 Hole; 2 Heat dissipation fins; 3 Heat conduction plate; 30 Plate body; 31 Bending edge; 4 Limiting component; 41 Limiting block; 42 Spring; 43 Dialing block; 5 Fan;

[0027] 200 Lamp body; 201 Conical surface; 202 Light emitting end. Detailed Embodiments

[0028] Please refer toFigures 1 to 3 , Figure 1 This is a cross-sectional view of a heat dissipation device with a lamp body installed in an embodiment of the present application; Figure 2 is Figure 1 a top view of the assembled structure of the heat dissipation fins and the heat conduction plate in; Figure 3 is Figure 1 an enlarged schematic view of part A in.

[0029] An embodiment of the present application provides a lamp assembly, including a lamp body 200 and a heat dissipation device for the lamp body 200. The heat dissipation device is mainly used to dissipate the heat generated when the lamp body 200 works, avoiding heat concentration. The lamp body 200 in this article can be an LED lamp, or other types of lamps such as xenon lamps or halogen lamps. The lamp body 200 has a light-emitting end 202, and light is emitted from this end. The lamp assembly can be used as a vehicle headlight, and of course, it can also be used as a lighting lamp in other environments. The use environment of the lamp assembly is not limited in this article. This article mainly continues to introduce the technical solutions and technical effects by taking the lamp assembly as a vehicle headlight as an example.

[0030] In an embodiment of the present application, the heat dissipation device of the lamp body 200 includes a heat dissipation base 1 and a plurality of heat dissipation fins 2. Both the heat dissipation base 1 and the heat dissipation fins 2 are for the rapid dissipation of the heat of the lamp body 200. They can use materials with good heat conduction, such as aluminum alloy, copper, or foam aluminum alloy, etc. Of course, materials combining a coating and a metal can also be used, and the coating can further enhance the heat dissipation effect.

[0031] The heat dissipation base 1 in the embodiment of the present application is provided with an installation structure for cooperating with the lamp body 200 for installation, Figure 1 shows that the installation structure is an installation through-hole 11. A part of the lamp body 200 is installed inside the installation through-hole 11. A conical surface 201 can be provided on the lamp body 200, and the installation through-hole 11 has a conical hole wall. The conical surface of the lamp body 200 cooperates with the conical hole wall to limit the lamp body 200 inside the installation through-hole 11. Of course, the installation structure can also be in other forms to cooperate with the lamp body 200 of a specific structure.

[0032] The heat dissipation fins 2 in the embodiment of the present application are a split structure with the heat dissipation base 1, that is to say, the heat dissipation fins 2 and the heat dissipation base 1 are independent components, processed separately, and assembled into a whole. The heat dissipation fins 2 are assembled on the circumference of the heat dissipation base 1, and the heat dissipation fins 2 are thermally conductively connected to the heat dissipation base 1, that is, heat can be transferred between the heat dissipation fins 2 and the heat dissipation base 1.

[0033] During operation, the heat generated by the LED lamp body is conducted to the heat dissipation base 1. A part of the heat is dissipated through the heat dissipation base 1, and the other part of the heat is transferred to the heat dissipation fins 2 through the heat dissipation base 1 and dissipated through the heat dissipation fins 2. Compared with the prior art where the heat dissipation fins 2 are installed on the back side of the heat dissipation block away from the lamp body 200, in the embodiment of the present application, the heat dissipation fins 2 are installed on the circumference of the heat dissipation base 1, and the distance between the circumference of the heat dissipation base 1 and the lamp shade is relatively large, which can accommodate more heat dissipation fins 2 in terms of volume and quantity. This is beneficial to increasing the heat dissipation area, quickly dissipating the heat of the lamp body 200 to the surrounding environment, avoiding heat accumulation, and is beneficial to extending the service life of the lamp body 200. Moreover, in the present application, the heat dissipation fins 2 and the heat dissipation base 1 are of a split structure. The heat dissipation fins 2 can be inserted into the inner side of the lamp shade from the position of the dust-proof installation hole on the lamp shade after the heat dissipation base 1 and the lamp body 200 are installed inside the lamp shade, and then assembled onto the heat dissipation base 1, solving the installation problem of the heat dissipation fins 2.

[0034] The more the number of the heat dissipation fins 2, the better the heat dissipation effect. However, the installation of the heat dissipation fins 2 one by one with the heat dissipation base 1 is relatively complex and time-consuming. In order to improve the installation efficiency of the heat dissipation fins 2 as much as possible, the present application also makes the following settings for the heat dissipation device.

[0035] In the embodiment of the present application, the heat dissipation device further includes at least one heat conduction plate 3. The number of the heat conduction plates 3 can be one, arranged on the circumference of the heat dissipation base 1. Of course, the number of the heat conduction plates 3 can also be two or more. The heat conduction plates 3 can be arranged along the circumference, and the heat conduction plates 3 can be arranged at intervals along the circumference. The sizes of the heat conduction plates 3 can be the same or different. The heat conduction plate 3 can be generally in a fan-shaped structure. One or two or more heat dissipation fins 2 can be installed on one side surface or both side surfaces of the heat conduction plate 3. The connection between the heat dissipation fins 2 and the heat conduction plate 3 can be realized by plugging. For example, grooves are provided on the heat conduction plate 3, and the heat dissipation fins 2 are inserted into the grooves. Or, the heat dissipation fins 2 and the heat conduction plate 3 can also be fixed by welding process.

[0036] The heat conduction plate 3 also needs to have good heat conduction ability. Its material can refer to the description of the materials of the heat dissipation fins 2 and the heat dissipation base 1. The heat conduction plate 3, the heat dissipation fins 2, and the heat dissipation base 1 can be of the same material or different materials.

[0037] In the embodiment of the present application, part of the heat transferred from the lamp body 200 to the heat dissipation base 1 is transferred to the heat dissipation fins 2 through the heat conduction plate 3. The heat of the lamp body 200 can be dissipated through the heat dissipation base 1, the heat conduction plate 3, and the heat dissipation fins 2 simultaneously, with a large heat dissipation area and high heat dissipation efficiency. And during installation, the heat dissipation fins 2 can be first assembled with the heat conduction plate 3 to form a sub-assembly, and then the sub-assembly is obliquely inserted into the inner side of the lamp shade from the position of the dust-proof installation hole, and then the heat conduction plate 3 is assembled onto the heat dissipation base 1, which can improve the assembly efficiency of the heat dissipation device.

[0038] The heat conducting plate 3 can be installed on the heat dissipation seat 1 along a plane perpendicular to the lamp body 200 inserted into the heat dissipation seat 1, that is, the heat conducting plate 3 is inserted into the peripheral wall of the heat dissipation seat 1 along the radial direction of the installation through hole 11. Of course, the heat conducting plate 3 can also be inserted into the heat dissipation seat 1 along the direction parallel to the axial direction of the installation through hole 11.

[0039] In the embodiment of the present application, the heat dissipation device further includes a limiting component 4, and the limiting component 4 is arranged on the heat dissipation seat 1. The heat conducting plate 3 and the heat dissipation seat 1 are detachably installed through the limiting component 4, that is, the heat conducting plate 3 and the heat dissipation seat 1 in this embodiment can be disassembled after being installed, so that when the heat conducting plate 3 or the heat dissipation fins 2 are damaged, the heat conducting plate 3 can be removed from the heat dissipation seat 1, replaced or repaired, which is convenient for maintenance and reduces the use cost of the lamp assembly.

[0040] The limiting component 4 may be a bolt, or a plug-in or clamping component. A specific implementation of the limiting component 4 is given below.

[0041] In a specific embodiment, one of the heat sink body 1 and the heat conducting plate 3 is provided with a socket, and the other is provided with a plug-in block. The socket and the plug-in block are plug-in matched. When the plug-in block is inserted into the socket, the limiting component 4 abuts against the plug-in block to limit the plug-in block inside the socket. The matching mode of the socket and the plug-in block plays a role in installation positioning to a certain extent, which is conducive to the rapid installation of the heat sink body 1 and the heat conducting plate 3, and the plug-in structure is simple. Figure 1 2 shows a specific embodiment in which a socket is provided on the heat sink body 1 and an insert is provided on the heat conducting plate 3. Of course, it is not excluded that a socket is provided on the heat conducting plate 3 and an insert is provided on the heat sink body 1.

[0042] In a specific embodiment, a slot is provided at the end of the heat sink body 1 away from the lamp body 200, and the opening of the slot faces the side away from the lamp body 200, that is, the opening of the slot faces the side of the dustproof mounting hole. The inner edge of the heat conducting plate 3 has a bent edge 31, the insertion hole is the slot, and the insert block is the bent edge 31. The heat conducting plate 3 is roughly an L-shaped structure, combined with Figure 1 and Figure 2 The heat conducting plate 3 includes a fan-shaped plate body 30 and a bent edge 31. The bent edge 31 is bent from the side of the fan-shaped plate body 30 close to the heat dissipation seat body 1. The fan-shaped plate body 30 is roughly flat and roughly perpendicular to the axial direction of the installation through hole 11. Of course, the fan-shaped plate body 30 can also be a curved surface structure. The bent edge 31 is inserted into the slot from the opening, and the bent edge 31 and the slot can be interference fit to improve the stability of the installation of the two.

[0043] In the embodiment of the present application, the limiting component 4 includes a limiting block 41, and the limiting block 41 can reciprocate between a first position and a second position relative to the heat sink body 1. The limiting block 41 can slide back and forth relative to the heat sink body 1, and can also reciprocate relative to the heat sink body 1. When the limiting block 41 is located at the first position, the limiting block 41 abuts against the heat conducting plate 3 to limit the heat conducting plate 3 from escaping from the slot, that is, at this time, the limiting block 41 can prevent the heat conducting plate 3 from escaping from the slot; when the limiting block 41 is located at the second position, the limiting block 41 is separated from the heat conducting plate 3, and at this time, the heat conducting plate 3 can be escaping from the slot.

[0044] This embodiment has a simple structure, the lamp assembly is light in weight, and is easy to operate.

[0045] In the embodiment of the present application, the limiting component 4 further includes a spring 42, which may be a coil spring 42, such as a cylindrical spring 42, a conical spring 42, etc. The spring 42 is pressed between the limiting block 41 and the heat sink body 1, and expands and contracts in the lateral direction. The limiting block 41 slides back and forth in the lateral direction relative to the heat sink body 1. Under the elastic force of the spring 42, the limiting block 41 can be maintained in the first position. Here, the lateral direction is the radial direction of the mounting through hole 11, which is perpendicular to the axial direction of the mounting through hole 11.

[0046] The structure of the limit block 41 sliding back and forth along the lateral direction on the heat sink body 1 is relatively simple and easy to operate.

[0047] For the convenience of operation, the limit block 41 may also have a shift block 43, which extends toward the side away from the lamp body 200 and extends outward to the outside of the heat sink body 1, and the shift block 43 is used to drive the limit block 41 to move. The operator can drive the limit block 41 to move relative to the heat sink body 1 by operating the shift block 43 extending outward to the outside of the heat sink body 1, and the operation is relatively simple.

[0048] In the embodiment of the present application, the heat dissipation device further includes a fan 5, which is mounted on the heat dissipation seat 1, and the air outlet or air inlet of the fan 5 is connected to the space where the heat dissipation fins 2 are located through the air duct provided on the heat dissipation seat 1. The fan 5 may be an axial flow fan, which is small in size and is conducive to the miniaturization of the lamp assembly. In one example, the air outlet of the fan 5 is close to one side of the heat dissipation fin 2. When the fan 5 is working, the air flow is sucked in from the external environment and blown into the air duct of the heat dissipation seat 1 from the air outlet, while carrying the heat of the heat dissipation seat to be discharged, and the air flow acts on the heat dissipation fins 2 on the outside at the same time, thereby improving the heat dissipation effect of the heat dissipation fins 2.

[0049] Of course, the fan 5 can also be installed in the reverse direction, with the air inlet side of the fan 5 installed close to the side of the heat dissipation fins 2, and the airflow flows from the side of the heat dissipation fins 2 to the external environment.

[0050] In the embodiment of the present application, the heat dissipation base body 1 has an installation through hole 11. The lamp body 200 is partially inserted and installed in the installation through hole 11. The fan 5 is installed in the installation through hole 11 and is located on the side of the lamp body 200 away from the light emitting end. The air duct further includes a duct 12 penetrating through the peripheral wall of the installation through hole 11. The air outlet of the duct 12 on the outer surface of the heat dissipation base body 1 faces the heat dissipation fins 2. Specifically, the air duct includes the duct and a partial section of the installation through hole 11. The opening of the duct 12 on the inner peripheral surface of the installation through hole 11 can be located above the fan 5. In this installation method, a part of the air volume of the fan 5 can directly contact the lamp body 200 to directly dissipate heat from the lamp body 200, and the heat dissipation effect is better. Moreover, this installation method occupies a small space and has a compact structure.

[0051] In addition, the embodiment of the present application further provides a vehicle, which has the above-mentioned lamp assembly. For other structures of the vehicle, please refer to the current technology and will not be elaborated herein.

[0052] The vehicle and the lamp assembly in the embodiment of the present application have the heat dissipation device of the above-mentioned lamp body 200, so the vehicle and the lamp assembly also have the above-mentioned technical effects of the heat dissipation device of the lamp body 200.

[0053] For other structures of the lamp assembly, please refer to the current technology and will not be elaborated in the present application.

[0054] In the description of the embodiment of the present application, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0055] In the embodiment of the present application, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0056] Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A heat dissipation device for a lamp body, characterized in that: include: A heat dissipation seat body is provided with a mounting structure for being mounted in coordination with the lamp body; A plurality of heat dissipation fins are separate structures from the heat dissipation seat body. The heat dissipation fins are assembled on the circumference of the heat dissipation seat body, and the heat dissipation fins are connected to the heat dissipation seat body by thermal conduction.

2. The heat dissipation device of the lamp body according to claim 1, characterized in that: It also includes a heat conducting plate arranged along the circumference of the heat dissipation seat body, at least one heat dissipation fin is installed on the heat conducting plate, the heat conducting plate is connected to the heat dissipation seat body, and the heat dissipation fin is thermally conductive with the heat dissipation seat body through the heat conducting plate.

3. The heat dissipation device of the lamp body according to claim 2, characterized in that: It also includes a limiting component, which is arranged on the heat dissipation seat body, and the heat conduction plate and the heat dissipation seat body are detachably installed through the limiting component.

4. The heat dissipation device of the lamp body according to claim 3, characterized in that: One of the heat sink body and the heat conducting plate is provided with a socket, and the other is provided with an insert block. The socket and the insert block are plug-fitted together. When the insert block is inserted into the socket, the limiting component abuts against the insert block to limit the insert block inside the socket.

5. The heat dissipation device of the lamp body according to claim 4, characterized in that: The end of the heat sink body away from the lamp body is provided with a slot, the opening of the slot faces the side away from the lamp body, the inner edge of the heat conduction plate has a bent edge, the insertion hole is the slot, and the insert block is the bent edge.

6. The heat dissipation device of the lamp body according to claim 5, characterized in that: The limiting component includes a limiting block, which can reciprocate between a first position and a second position relative to the heat sink body. When the limiting block is located at the first position, the limiting block abuts against the heat conducting plate to limit the heat conducting plate from falling out of the slot; when the limiting block is located at the second position, the limiting block is separated from the heat conducting plate.

7. The heat dissipation device of the lamp body according to claim 6, characterized in that: The limiting component further includes a spring, which is press-fitted between the limiting block and the heat sink body and expands and contracts in the lateral direction. The limiting block reciprocates relative to the heat sink body in the lateral direction. Under the elastic force of the spring, the limiting block can be maintained in the first position; Alternatively or / and, the limiting block further comprises a shifting block, the shifting block extends to the outside of the heat dissipation seat toward a side away from the lamp body, and the shifting block is used to drive the limiting block to move.

8. The heat dissipation device of a lamp body according to any one of claims 1 to 7, characterized in that: It also includes a fan installed on the heat dissipation seat, and the air outlet or air inlet of the fan is connected to the space where the heat dissipation fins are located through an air duct arranged on the heat dissipation seat.

9. The heat dissipation device of the lamp body according to claim 8, characterized in that: The heat sink body has a mounting through hole, the lamp body is partially inserted into and mounted in the mounting through hole, the fan is mounted in the mounting through hole and is located on the side of the lamp body away from the light-emitting end, the air duct includes a hole penetrating the peripheral wall of the mounting through hole, and the air outlet of the hole on the outer surface of the heat sink body faces the heat dissipation fins.

10. A lamp assembly, characterized in that: include: Lamp body; The heat dissipation device of a lamp body according to any one of claims 1 to 9, wherein the lamp body is installed in cooperation with the mounting structure.

11. A vehicle, characterized in that: A lamp assembly comprising the lamp assembly of claim 10.

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