Heat dissipation structure of down lamp

Abstract

An upper end and a lower end of an outer shell are open, the upper end of the outer shell is connected with a heat dissipation plate with heat dissipation fins through a connecting block, a gap is arranged between the edge of the heat dissipation plate and the inner wall of the outer shell in the circumferential direction and serves as a ventilation channel, and air in the outer shell circulates with external air through the ventilation channel to form air convection. The shell and the light guide plate are respectively provided with a vent hole and an air hole so as to form better air convection efficiency, and convection air blows through the heat dissipation plate, so that the heat dissipation efficiency can be further improved, the working stability of the down lamp can be ensured, more diversified LED lamp beads with higher power can be conveniently installed, and the illumination brightness and the illumination effect are improved.

Description

Technical Field

[0001] This utility model relates to lighting fixtures, and in particular to a heat dissipation structure for a downlight. Background Technology

[0002] A downlight is a type of light fixture that is fixed to the ceiling using a clip. The housing for mounting the LED chips is hollow and open at one end. To ensure efficient heat dissipation, the housing is made of heat-dissipating aluminum, and the end of the housing may have several parallel heat dissipation fins. Heat generated during operation is transferred to the housing, and then dissipated through heat exchange between the housing and its heat dissipation fins and the air. However, this structure has relatively low heat dissipation efficiency, which is detrimental to the stability of the LED light and makes it difficult to install higher-power LED chips. Utility Model Content

[0003] The purpose of this invention is to provide a downlight heat dissipation structure with a ventilation channel to improve the heat dissipation efficiency of the downlight.

[0004] The downlight heat dissipation structure of this utility model includes a cylindrical outer shell with openings at both ends. A heat dissipation plate is connected to the top of the outer shell. The heat dissipation plate is fixedly connected to the inner wall of the outer shell by a connecting block. A circumferential gap is provided between the edge of the heat dissipation plate and the inner wall of the outer shell. A lamp plate with LED beads is connected to the inner side of the heat dissipation plate. Several heat dissipation fins are arranged in parallel on the outer side of the heat dissipation plate.

[0005] The downlight heat dissipation structure of this utility model features open ends on both sides of the outer casing, allowing convection between the gas inside the casing and the outside air. A gap is left between the edge of the heat sink and the inner wall of the casing as a ventilation channel, allowing the gas inside the casing to circulate with the outside air. Simultaneously, the heat sink is connected to the outer casing via connecting blocks, ensuring both mutual fixation and airflow. During operation, the LED beads emit light and generate heat. This heat is transferred not only to the outer casing and heat sink but also heats the gas inside the downlight. On one hand, the heat sink rapidly dissipates heat through its fins; on the other hand, due to the upward movement of hot air, the gas inside the downlight is expelled through the airflow channel, and fresh air re-enters, creating air convection. This convection air then blows across the heat sink, further accelerating its heat dissipation. This simple yet ingenious downlight heat dissipation structure effectively accelerates heat dissipation, ensuring the stability of the downlight's operation and facilitating the installation of higher-power and more diverse LED beads, thus improving brightness and lighting effect.

[0006] Preferably, the outer casing, heat sink, and connecting block are integrated into one unit.

[0007] Preferably, the middle part of the outer casing has a wire passage hole and a vent hole that connect the outer wall to the interior.

[0008] Preferably, the wire hole and the vent hole are set in the same hole.

[0009] Preferably, the bottom of the outer casing is also equipped with a light guide plate, and the light guide plate has ventilation holes.

[0010] Preferably, a light guide cup is installed inside the housing, with one end of the light guide cup facing the LED lamp bead and the other end facing downwards.

[0011] Preferably, the two ends of the light guide cup are respectively recessed, and the diameter of the recessed part gradually decreases from the outside to the inside.

[0012] By designing the aforementioned heat dissipation structure for the downlight, heat dissipation efficiency can be further improved. Attached Figure Description

[0013] Figure 1 , 2 This is a schematic diagram of the heat dissipation structure of a downlight.

[0014] Figure 3 This is a top view schematic diagram of the heat dissipation structure of the downlight.

[0015] Figure 4 This is a cross-sectional view of the heat dissipation structure of the downlight. Detailed Implementation

[0016] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0017] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0018] If the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] This utility model proposes a heat dissipation structure for downlights.

[0020] The downlight heat dissipation structure of this embodiment includes a cylindrical outer shell 1 with openings at both ends. A heat dissipation plate 2 is connected to the top of the outer shell. The heat dissipation plate is fixedly connected to the inner wall of the outer shell by a connecting block 3. A circumferential gap 4 is provided between the edge of the heat dissipation plate and the inner wall of the outer shell. A lamp board (not shown) with LED beads is connected to the inner side of the heat dissipation plate. Several heat dissipation fins are arranged in parallel on the outer side of the heat dissipation plate.

[0021] like Figure 1-4 As shown, both ends of the outer casing are designed as open structures, allowing the gas inside the casing to convect with the outside air. A gap is left between the edge of the heat sink and the inner wall of the casing as a ventilation channel, through which the gas inside the casing can circulate with the outside air. Simultaneously, the heat sink is connected to the casing via connecting blocks to achieve both mutual fixation and airflow. During operation, the LED beads emit light and generate heat. This heat is transferred not only to the casing and heat sink but also to the gas inside the downlight. On one hand, the heat sink rapidly dissipates heat through its cooling fins; on the other hand, due to the upward movement of hot air, the gas inside the downlight is expelled through the airflow channel, and fresh air re-enters the downlight, thus creating air convection. This convection air then blows across the heat sink, further accelerating its heat dissipation. This downlight heat dissipation structure is simple yet ingenious, effectively accelerating heat dissipation. It not only ensures the stability of the downlight's operation but also facilitates the installation of higher-power and more diverse LED beads, improving lighting brightness and effect.

[0022] like Figure 4As shown, the outer shell 1, heat sink 2, and connecting block 3 are integrated, resulting in faster heat transfer, easier manufacturing, and reduced assembly requirements. The outer shell 1 has a wire hole 5 and a vent hole in its center, connecting the outer wall to the interior. The wire hole can be used for wiring, while the vent hole allows fresh air to enter the downlight more quickly. Its position relative to the airflow also helps improve air convection speed. Furthermore, the wire hole 5 and vent hole can be co-located, meaning the wire hole also functions as a vent hole, reducing the need for additional openings, lowering manufacturing difficulty, and improving production efficiency. Additionally, a light guide cup 6 is installed inside the outer shell 1. One end of the light guide cup faces the LED bead, while the other end faces downwards. Both ends of the light guide cup 6 are concave, forming a light guiding surface. The diameter of the concave portion gradually decreases from the outside to the inside, creating a trumpet-shaped structure for better light focusing. A light guide plate 7 is also installed at the bottom of the outer shell 1, with ventilation holes 71 to further accelerate air convection and heat dissipation.

[0023] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A heat dissipation structure for a downlight, characterized in that: It includes a cylindrical shell (1) with openings at both ends, a heat sink (2) connected to the top of the shell, a connecting block (3) connecting the heat sink to the inner wall of the shell, a circumferential gap (4) between the edge of the heat sink and the inner wall of the shell, a lamp board with LED beads connected to the inner side of the heat sink, and several heat sink fins arranged in parallel on the outer side of the heat sink.

2. The downlight heat dissipation structure according to claim 1, characterized in that: The outer shell (1), heat sink (2) and connecting block (3) are integrated into one unit.

3. The downlight heat dissipation structure according to claim 1, characterized in that: The outer casing (1) has a wire hole (5) and a vent hole in the middle that connect the outer wall to the interior.

4. The downlight heat dissipation structure according to claim 3, characterized in that: The wire hole (5) and the vent hole are set in the same hole.

5. The downlight heat dissipation structure according to any one of claims 1-4, characterized in that: The bottom of the outer casing (1) is also equipped with a light guide plate (7), and the light guide plate has ventilation holes (71).

6. The downlight heat dissipation structure according to any one of claims 1-4, characterized in that: The light guide cup (6) is installed inside the outer shell (1), with one end of the light guide cup facing the LED lamp bead and the other end facing downward.

7. The downlight heat dissipation structure according to claim 6, characterized in that: The two ends of the light guide cup (6) are respectively recessed, and the diameter of the recessed part gradually decreases from the outside to the inside.

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