Shell heat dissipation structure of high-power off-machine light-emitting diode (LED) lamp
By using a combined structure of fins, heat pipes and graphene coatings in the external LED lamps of high-power machines, the problem of insufficient natural convection heat dissipation ability is solved, significantly improving the heat dissipation performance of the lamp housing and ensuring reliability at high temperatures.
Patent Information
- Application Number
- CN202420024101.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-05
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-05
AI Technical Summary
Existing high-power external LED lamps use natural convection to dissipate heat, and the heat dissipation ability is poor, especially in harsh environments, it is difficult to meet the reliability requirements at high temperatures.
A heat dissipation structure including the bottom wall, peripheral wall and built-in space of the shell is designed, using intermediate vertical fins, left oblique fin sets and right oblique fin sets to enhance convection. , conduction and radiation heat dissipation capabilities.
It significantly improves the thermal conductivity and heat dissipation capabilities of the lamp housing, ensuring reliability at high temperatures.
Smart Images
Figure CN222142980U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an external LED lamp, in particular to a shell heat dissipation structure of a high-power external LED lamp. Background Art
[0002] As the power of LED lamps increases, the heat they generate is also increasing. The thermal design of LEDs is becoming more and more challenging, and the heat dissipation risks they face are also increasing. Especially for the military industry, the working environment conditions of high-power off-board LED lamps are more severe, and the heat dissipation risks and challenges they face are more severe. Currently, existing high-power off-board LED lamps use natural convection. The disadvantage is that the heat dissipation capacity is poor. Summary of the invention
[0003] The utility model aims to solve the problem that the high-power external LED lamp in the prior art only uses natural convection for heat dissipation, and to provide a novel shell heat dissipation structure of the high-power external LED lamp.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a technical solution: a shell heat dissipation structure of a high-power external LED lamp, comprising: a shell bottom wall, a shell peripheral wall and a shell built-in space surrounded by the shell bottom wall and the shell peripheral wall; the back of the shell bottom wall is provided with a middle vertical fin, a left oblique fin group and a right oblique fin group, the middle vertical fin is at the midline position of the shell bottom wall, the left oblique fin group is on the left side of the middle vertical fin, and the right oblique fin group is on the right side of the middle vertical fin; the front of the shell bottom wall is provided with a C-type heat pipe group, the C-type heat pipe group is composed of heat pipes evenly distributed in the circumferential direction, wherein the openings of the heat pipes face outward.
[0005] As a preferred solution for the heat dissipation structure of the shell of a high-power external LED lamp, the fins of the left oblique fin group and the fins of the right oblique fin group are symmetrical about the middle vertical fin.
[0006] As a preferred solution for the heat dissipation structure of the shell of a high-power external LED lamp, the angle formed by the fins of the left oblique fin group and the fins of the right oblique fin group is 60°.
[0007] As a preferred solution for the shell heat dissipation structure of a high-power external LED lamp, the fins of the left oblique fin group are disconnected from the middle vertical fins, and the fins of the right oblique fin group are disconnected from the middle vertical fins.
[0008] As a preferred solution for the shell heat dissipation structure of a high-power external LED lamp, the number of heat pipes in the C-type heat pipe group is not less than 3.
[0009] As a preferred solution for the heat dissipation structure of the shell of a high-power external LED lamp, the surface coating of the lamp shell is graphene nano-heat dissipation paint.
[0010] Compared with the prior art, the beneficial effects of the present invention are at least that: the lamp housing is improved by using fins (convection heat dissipation), heat pipes (conduction heat dissipation), and graphene coatings (radiation heat dissipation), thereby enhancing the thermal conductivity and heat dissipation capabilities of the lamp housing and providing a guarantee for the reliability of the lamp product at high temperatures. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a front view of the housing of the lamp of the utility model.
[0012] Figure 2 It is a side view of the housing of the lamp of the present utility model.
[0013] Figure 3 It is a rear view of the housing of the lamp of the utility model. DETAILED DESCRIPTION
[0014] The present invention is further described in detail below through specific implementations in combination with the accompanying drawings. It should be noted that the description of these implementations is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0015] A shell heat dissipation structure of a high-power external LED lamp comprises: a shell bottom wall 1, a shell peripheral wall 2, and a shell built-in space surrounded by the shell bottom wall 1 and the shell peripheral wall 2. A light source printed circuit board is built in the shell built-in space. The front side of the light source printed circuit board has the high-power LED. The back side of the light source printed circuit board is in contact with the front side of the shell bottom wall 1.
[0016] See also Figure 1 The back of the shell bottom wall 1 has a middle vertical fin 11, a left oblique fin group 12 and a right oblique fin group 13. The middle vertical fin 11 is located at the center line of the shell bottom wall 1. The left oblique fin group 12 is on the left side of the middle vertical fin 11. The right oblique fin group 13 is on the right side of the middle vertical fin 11. The fins of the left oblique fin group 12 and the fins of the right oblique fin group 13 are symmetrical about the middle vertical fin 11.
[0017] The fins of the left-slanted fin group 12 are all inclined to the left, the fin spacing is generally 8-10 mm, the fin height is determined by the thickness of the shell bottom wall 1, and the fins extend to the envelope surface of the shell peripheral wall 2. The fins of the right-slanted fin group 13 are all inclined to the right, the fin spacing is generally 8-10 mm, the wing height is determined by the thickness of the shell bottom wall 1, and the fins extend to the envelope surface of the shell peripheral wall 2.
[0018] The fins of the left oblique fin group 12 are disconnected from the middle vertical fin 11 , and the fins of the right oblique fin group 13 are disconnected from the middle vertical fin 11 , in order to facilitate airflow to flow along the middle vertical fin 11 .
[0019] Preferably, the angle formed by the fins of the left oblique fin group 12 and the fins of the right oblique fin group 13 is 60°. Through simulation calculation, it is found that at this time, the coordination between the velocity field and the temperature field vector of the shell bottom wall 1 is better, which can enhance convective heat transfer.
[0020] See also Figure 2 The envelope surface of the shell peripheral wall 2 has a large curvature. Figure 2 The dotted line portion is the envelope surface of the existing shell peripheral wall 2, and the solid line portion is the envelope surface of the shell peripheral wall 2. Compared with the envelope surface of the existing shell peripheral wall 2, the diameter of the envelope surface of the shell peripheral wall 2 is increased, so that the effective heat dissipation area of the lamp housing is increased. The above improvement does not affect the thickness space occupied by the lamp housing, and only slightly affects the volume and weight of the lamp housing.
[0021] See also Figure 3 , the front side of the bottom wall 1 of the shell is provided with a C-type heat pipe group 14. The C-type heat pipe group 14 is composed of three heat pipes. The heat pipes are embedded in the front side of the bottom wall 1 of the shell. The heat pipes are evenly distributed in the circumferential direction and open outward. The purpose of configuring the C-type heat pipe group 14 is to conduct the heat from the center of the bottom wall 1 of the shell to the edge position. Preferably, the heat pipe adopts a copper tube with a diameter of 6mm, flattened to 2mm, and the turning radius of the heat pipe is ≥25mm to avoid bending and damaging the capillary structure inside the heat pipe. There is a groove on the front side of the bottom wall 1 of the shell, and the heat pipe of the C-type heat pipe group 14 is fixed inside the groove by reflow soldering.
[0022] Preferably, the lamp housing is sprayed with graphene nano-heat dissipation paint. Graphene nano-heat dissipation paint is a commercially available material, which has a higher radiation heat transfer coefficient than other traditional heat dissipation paints and can improve the radiation heat transfer capacity of the lamp housing to a certain extent.
[0023] The above only expresses the implementation mode of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A shell heat dissipation structure of a high-power external LED lamp, characterized in that: include: A shell bottom wall, a shell peripheral wall and a shell built-in space surrounded by the shell bottom wall and the shell peripheral wall; the back of the shell bottom wall is provided with a middle vertical fin, a left oblique fin group and a right oblique fin group, the middle vertical fin is at the midline position of the shell bottom wall, the left oblique fin group is on the left side of the middle vertical fin, and the right oblique fin group is on the right side of the middle vertical fin; the front of the shell bottom wall is provided with a C-type heat pipe group, the C-type heat pipe group is composed of heat pipes evenly distributed in the circumferential direction, wherein the openings of the heat pipes face outwards.
2. The heat dissipation structure of the housing of the high-power external LED lamp according to claim 1, characterized in that: The fins of the left oblique fin group and the fins of the right oblique fin group are symmetrical about the middle vertical fin.
3. The heat dissipation structure of the housing of the high-power external LED lamp according to claim 2, characterized in that: The angle formed by the fins of the left-slanted fin group and the fins of the right-slanted fin group is 60°.
4. The heat dissipation structure of the housing of a high-power external LED lamp according to any one of claims 1 to 3, characterized in that: The fins of the left oblique fin group are disconnected from the middle vertical fin and are not connected, and the fins of the right oblique fin group are disconnected from the middle vertical fin and are not connected.
5. The heat dissipation structure of the housing of a high-power external LED lamp according to claim 1, characterized in that: The number of heat pipes in the C-type heat pipe group is not less than 3.
6. The heat dissipation structure of the housing of a high-power external LED lamp according to claim 1, characterized in that: The surface coating of the lamp housing is graphene nano heat dissipation coating.