WO2021104121A1

WO2021104121A1 - Led heat dissipation device and lamp

Info

Publication number: WO2021104121A1
Application number: PCT/CN2020/129726
Authority: WO
Inventors: 于冬京; 王国平; 卫庆军
Original assignee: 苏州欧普照明有限公司; 欧普照明股份有限公司
Priority date: 2019-11-26
Filing date: 2020-11-18
Publication date: 2021-06-03
Also published as: CN210831898U

Abstract

An LED heat dissipation device, comprising a heat collection side (2) attached to an LED light source (68), and a heat dissipation side (1) away from the heat collection side (2). The direction from the heat collection side (2) to the heat dissipation side (1) is a first direction (a), the heat dissipation side (1) is formed with heat dissipation grooves (10), the heat dissipation groove (10) is provided with an opening (100) and a bottom (102), and the opening (100) is opposite to the bottom (102); the bottom (102) is provided with a protrusion (1026) protruding along the first direction (a), the protrusion (1026) penetrates through the bottom (102), and the bottom (102) smoothly extends from the protrusion (1026) in a direction opposite to the first direction (a). The protrusion (1026) is provided at the bottom (102) of the heat dissipation groove (10) of the LED heat dissipation device, and the bottom (102) is gradually lowered from the protrusion (1026) to form a smooth drainage channel, so that accumulated water can be drained by means of structures such as drainage holes (1028) or sidewalls (106), and dirt at the bottom of the heat dissipation groove can be removed to achieve the technical effect of automatic drainage and dirt removal.

Description

LED heat dissipation device and lamp

Technical field

The present invention relates to the technical field of lighting equipment, in particular to an LED heat dissipation device and a lamp.

Background technique

Due to the advantages of long life, environmental protection and cleanliness, low power consumption, and controllable light color, LED light sources are gradually being promoted to street lamps and other public lighting settings that need to work for a long time. In order to facilitate the heat dissipation of the LED light source, the LED light source and the LED heat sink are often used. Used in conjunction to facilitate its heat dissipation.

At present, because the light projection direction of the LED street lamp faces downward, the upwardly arranged LED heat sink is prone to water and dirt, which may affect normal operation.

Summary of the invention

The embodiment of the present application provides an LED heat dissipation device to solve the above-mentioned problem.

The embodiments of this application adopt the following technical solutions:

The embodiment of the present application provides an LED heat dissipation device, which includes a heat collection side that is used for bonding with the LED light source and a heat dissipation side that faces away from the heat collection side. The first heat dissipation side is directed from the heat collection side to the heat dissipation side. In one direction, the heat dissipation side is provided with a heat dissipation groove, the heat dissipation groove is provided with a notch and a groove bottom, and the notch is opposite to the groove bottom; and the groove bottom is provided with a protrusion protruding in the first direction The protruding portion penetrates the groove bottom, and the groove bottom smoothly extends from the protruding portion to the opposite direction of the first direction.

Preferably, the heat dissipation groove further has opposite side walls, a pair of the side walls and the groove bottom form a pair of opposite side ports, and the protruding portion penetrates the groove bottom and connects a pair of the side ports. wall.

Preferably, the bottom of the groove is provided with a drain hole penetrating the heat dissipation side and the heat collection side, and the drain hole is opened at the intersection of the side wall and the bottom of the groove.

Preferably, the heat dissipation groove further includes heat dissipation fins, and the structure that the heat dissipation fin structure protrudes from the bottom of the groove and does not exceed the notch in the first direction

Preferably, it further includes a connecting ear, the heat dissipating side is further provided with a heat dissipating side outer edge, the connecting ear extends from the outer edge of the heat dissipating side in a direction away from the notch, and the connecting ear is provided with For the connecting piece connected to the outside, the notch does not exceed the connecting ear in the first direction.

Preferably, there are two connecting ears, and the two connecting ears are symmetrically arranged with respect to the heat dissipation groove.

Preferably, the connecting ear portion has a pressure bearing surface facing in the first direction and a reinforcing surface facing away from the pressure bearing surface, and the connecting ear portion has a reinforcing rib protruding from the reinforcing surface.

Preferably, it further includes a side surface of a heat sink, the heat collection side is connected to the heat dissipation side through the side surface of the heat sink, the side surface of the heat sink is adjacent to the connecting ear, and the reinforcing ribs dissipate heat from the The side of the device extends through the reinforcing surface.

Preferably, the heat dissipation fin structure extends from the bottom of the groove along the first direction to a position flush with the groove.

Preferably, the heat dissipation fin structure is arranged in an array.

Preferably, the heat dissipation fin structure includes a first fin group and a second fin group, the groove bottom has a groove bottom center, and the first fin group and the second fin group are opposite to the The groove bottom center is arranged symmetrically.

Preferably, the shapes of the cross section of the first fin group and the second fin group perpendicular to the first direction are both V-shaped, and the top of the V-shaped shape points to the center of the groove bottom.

Preferably, the protruding part is connected to the top end of the V-shape.

Preferably, it further includes a through hole waterproof structure, the heat collection side is provided with a power through hole for passing through the LED power cord, the power through hole penetrates the heat dissipation side and the heat collection side, and the through hole is waterproof The structure is arranged in the power supply through hole and fills the space between the LED power line and the power supply through hole.

The embodiment of the present application also provides a lamp, comprising a lamp body, an LED light source, and the LED heat sink according to any one of claims 1 to 13, wherein the lamp body is provided with a penetrating installation cavity, and the installation cavity has mutually deviated A first opening and a second opening, the LED heat sink is fixed in the installation cavity with the heat collection side facing the first opening and the heat dissipation side facing the second opening. The LED light source Fixed on the heat collection side.

In this application, a protrusion is provided at the bottom of the heat dissipation groove on the LED heat sink, and the groove bottom is gradually lowered from the protrusion to form a smooth drainage channel. The water can be drained through structures such as drainage holes or side walls. At the same time, the dirt at the bottom of the tank can be removed, and the technical effect of automatic drainage and sewage discharge is realized.

Description of the drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

FIG. 1 is a schematic diagram of a side of the heat dissipation side of an LED heat dissipation device disclosed in an embodiment of the application;

2 is a schematic diagram of a side of the heat collection side of an LED heat sink disclosed in an embodiment of the application;

3 is a schematic cross-sectional view of an LED heat sink disclosed in an embodiment of the application;

4 is a schematic diagram of a side of a first opening of a lamp disclosed in an embodiment of the application;

Fig. 5 is a schematic diagram of a side view of a lamp disclosed in an embodiment of the application;

Fig. 6 is a schematic diagram of a side of a second opening of a lamp disclosed in an embodiment of the application.

Description of reference signs:

1- heat dissipation side, 2- heat collection side, 3- connection ears, 4- heat sink side, 5- through-hole waterproof structure, 6-lamps, 10- heat sink, 12- outer edge of heat-dissipating side, 20- power supply Hole, 30-connector, 32-pressure surface, 34-reinforced surface, 60-lamp body, 62-mounting cavity, 64-first opening, 66-second opening, 68-LED light source, 100-notch, 102-slot bottom, 104-heat dissipation fin structure, 106-side wall, 108-side port, 200-opening, 340-stiffener, 1040-first fin group, 1042-second fin group, 1020-slot Bottom center, 1022-first heat dissipation surface, 1024-second heat dissipation surface, 1026-protrusions, 1028-drain hole, a-first direction.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

An embodiment of the present application provides an LED heat sink. As shown in FIG. 1, the LED heat sink has a heat dissipation side 1, a heat collection side 2, and a connecting ear 3, wherein the heat collection side 2 is used for bonding the LED light source and the LED light source The emitted heat is transferred to the heat dissipation side 1 opposite to the heat collection side 2 to improve the heat dissipation efficiency. To facilitate the description of the positional relationship between the components, the direction of the heat collection side 2 pointing to the heat dissipation side 1 is the first direction a.

The LED heat sink described in the embodiments of this application is generally used in an environment where the heat collecting side 2 faces downwards, and the heat dissipation side 1 faces upwards, and is installed on a frame or other carrier through the connecting ears 3, that is, it is suitable for the light emitting direction downwards. The use environment, of course, can also be installed in other directions as needed.

As shown in Figures 1 and 3, the groove bottom 102 is provided with a protruding portion 1026 protruding along the first direction a. The protruding portion 1026 can be connected to the top of the V-shape as shown in Figure 1, or can be set as the groove bottom 102 An edge, as shown in FIG. 3, the groove bottom 102 gradually and smoothly extends from the protrusion 1026 to the opposite direction of the first direction a, so that when there is water in the groove, due to the raised protrusion 1026, it can be free from the groove The middle drain hole 1028 or the side port 108 flows out, and at the same time, due to the existence of the protrusion 1026, the groove bottom 102 is equivalent to having a reinforcing rib penetrating the groove bottom, which increases the resistance to torsion force.

As shown in FIG. 1, the heat dissipation side 1 is provided with a heat dissipation groove 10. As shown in FIG. 1, the heat dissipation groove 10 described in the present application is a recess formed by the heat dissipation side 1 in a direction opposite to the first direction a, and the heat dissipation groove 10 It is provided with a notch 100, a groove bottom 102 and a heat dissipation fin structure 104. The notch 100 is opposite to the groove bottom 102. The notch 100 can have the same shape as the groove bottom 102 as shown in FIG. 104 protrudes from the groove bottom 102. The heat dissipation fin structure 104 may be arranged in an array as shown in FIG. 1, or may be arranged randomly without a certain arrangement sequence, as long as it does not exceed the notch 100 in the first direction a. That is, in this way, the notch 100 can provide a certain blocking effect for the heat dissipation fin structure 104.

In order to further increase the degree of protection of the heat dissipation fin structure 104, the heat dissipation side 1 is also provided with a heat dissipation side outer edge 12, and the connecting ear 3 extends from the heat dissipation side outer edge 12 in a direction away from the notch 100. The connecting ear 3 can be shown in the figure The number shown in 1 is two and symmetrical with respect to the heat dissipation groove, or it can be multiple and evenly arranged along the circumferential direction of the slot 100. The connecting ear 3 is provided with a connecting piece 30 for connecting with the outside. The connecting piece 30 may be a connecting hole as shown in FIG. 1 or a hook or other structure. The notch 100 does not exceed the connecting hole in the first direction a. The ear 3 may be connected to the ear 3 beyond the notch 100, or the two may be flush with each other as shown in FIG. 1. Through the above configuration, the probability of damage to the heat dissipation fin structure 104 directly under pressure can be effectively reduced, thereby ensuring the heat dissipation efficiency.

In order to enhance the mechanical strength of the connecting ear 3, in this embodiment, the connecting ear 3 has a pressure-bearing surface 32 facing the first direction a and a reinforcing surface 34 facing away from the pressure-bearing surface 32, as shown in FIG. 1, The pressure-bearing surface 32 and the heat-dissipating side 1 are flush with each other, or they can be arranged such that the pressure-bearing surface 32 exceeds the heat-dissipating side 1 in the first direction a. The reinforcing surface 34 is provided with a protruding rib 340, which is increased by using the rib 340 The mechanical strength of the connecting ear 3 is improved. In this embodiment, as shown in FIG. 1, it also has a side surface 4 of the heat sink. The heat collection side 2 is connected to the side surface 1 of the heat sink through the side surface 4 of the heat sink device. The connecting ear 3 is adjacent to the side surface 4 of the heat sink device. As shown in FIG. 1, it extends from the side surface 4 of the heat sink and penetrates the reinforcing surface 34, so that one end of the reinforcing rib 340 can be fixed, and the reinforcing effect is better.

In order to increase the heat dissipation effect, in this embodiment, the heat dissipation fin structure 104 extends from the groove bottom 102 in the first direction a and extends to the groove bottom 102, so that a relatively smooth air flow can be formed between the heat dissipation fin structures 104 Channel and increase the surface area of the heat dissipation fin structure 104 to the maximum.

In order to increase the mechanical strength of the heat dissipation fin structure 104, in this embodiment, the heat dissipation fin structure 104 includes a first fin group 1040 and a second fin group 1042. The groove bottom 102 has a groove bottom center 1020, and the first fin The fin group 1040 and the second fin group 1042 are arranged symmetrically with respect to the groove bottom center 1020. As shown in FIG. 1, a plurality of symmetrically arranged first fin groups 1040 and second fin groups can be arranged in the heat dissipation groove 10 Group 1042, in this way, a more uniform force-bearing structure can be formed and the mechanical strength can be increased. In order to further increase the mechanical strength of the heat dissipation fin structure 104, the cross-sectional shape of the first fin group 1040 and the second fin group 1042 perpendicular to the first direction a can be set as a V-shaped, V-shaped as shown in FIG. The top end points to the center of the groove bottom 1020, so that ribs are formed at the top end of the V shape to increase the mechanical strength.

During the use of the LED heat sink, it will not only be subjected to external pressure, but may also be subjected to torsion. In order to enhance the resistance of the LED heat sink in the embodiments of the present application to torsion, as shown in FIG. 1, the groove bottom 102 It includes a first heat dissipation surface 1022 and a second heat dissipation surface 1024. The first heat dissipation surface 1022 and the second heat dissipation surface 1024 are adjacent to each other and form a protrusion 1026 protruding from the groove bottom 102 in the first direction a. The protrusion 1026 Connecting to the top of the V shape further increases the resistance to torsion.

As shown in FIG. 1, in order to increase the heat dissipation efficiency, the heat dissipation groove 10 described in the embodiment of the present application is a U-shaped groove. The U-shaped groove has opposite side walls 106. The opposite side walls 106 and the groove bottom 102 form a pair of opposite The heat dissipation fin structure 104 penetrates through the two side ports 108, so that air can flow in from one side port 108, pass through the heat dissipation fin structure and flow out from the other side port 108, which improves the heat dissipation efficiency.

In order to improve the drainage performance, the groove bottom 102 is provided with drainage holes 1028 penetrating through the heat dissipation side 1 and the heat collection side 2, so that when the heat dissipation side 1 is set up, the rainwater and other accumulated water therein can be effectively discharged. At the same time, the heat collection side 2 is provided with a power supply through hole 20 penetrating the heat dissipation side 1 and the heat collection side 2. The power supply through hole 20 is used to pass through the LED power cord for powering the LED, and a through hole waterproof structure is provided in the power through hole 20 5. The through-hole waterproof structure 5 can be made of rubber or styrofoam, which can fill the gap between the LED power cord and the power through hole 20 and prevent moisture from passing through the power through hole 20. In order to ensure the overall mechanical strength of the LED heat dissipation device, the opening 200 of the power supply through hole 20 on the heat dissipation side 1 is located at the center 1020 of the groove bottom, and the power supply through hole 20 extends along the first direction a.

The embodiment of the present application also provides a lamp 6 using the above-mentioned LED heat sink. As shown in FIGS. 4 and 5, the lamp 6 has a lamp body 60. The lamp body 60 shown in FIGS. 4, 5, and 6 is designed as The lamp shape suitable for street lamps can also be designed as lamp shapes suitable for other purposes. The lamp body 60 is provided with a through installation cavity 62. As shown in FIG. 5, the installation cavity 62 has a first opening 64 and a first opening 64 that are away from each other. Two openings 66 are used to facilitate the installation of the internal structure and the light emission.

As shown in Figure 4, when it is designed as a street lamp, Figure 4 shows the upward side of the lamp 6, the LED heat sinks are installed side by side in the mounting cavity 62, and the heat dissipation side 1 faces upwards, so that the fixed LED light source 68 is fixed. The heat-collecting side faces downwards. According to the above-mentioned LED heat dissipation device structure, the heat-dissipating side 1 facing upward at this time can effectively drain the accumulated water and dirt therein.

FIG. 6 shows the side of the second opening 66 of the lamp 6, and a plurality of LED light sources 68 are fixed on the heat collecting side 2, and can emit light downward when it is set as a street lamp.

The above embodiments of this application focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the conciseness of the text, here is No longer.

The above descriptions are only examples of the present application, and are not used to limit the present application. For those skilled in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims

An LED heat dissipating device, comprising a heat collecting side for bonding with the LED light source and a heat dissipating side facing away from the heat collecting side, and a first direction is from the heat collecting side to the heat dissipating side, The heat dissipation side is provided with a heat dissipation groove, the heat dissipation groove is provided with a notch and a groove bottom, and the notch is opposite to the groove bottom;

The groove bottom is provided with a protruding portion protruding in the first direction, the protruding portion penetrates the groove bottom, and the groove bottom smoothly extends from the protruding portion in a direction opposite to the first direction .
The LED heat dissipation device of claim 1, wherein the heat dissipation groove further has opposite side walls, a pair of the side walls and the groove bottom form a pair of opposite side ports, and the protruding portion penetrates the The groove bottom is connected to the pair of side walls.
The LED heat sink of claim 2, wherein the bottom of the groove is provided with a drain hole penetrating through the heat dissipation side and the heat collection side, and the drain hole is opened at the intersection of the side wall and the bottom of the groove Place.
The LED heat dissipation device of claim 1, wherein the heat dissipation groove further includes heat dissipation fins, and the structure that the heat dissipation fin structure protrudes from the bottom of the groove and does not exceed the groove in the first direction mouth.
The LED heat sink of claim 4, further comprising a connecting ear, the heat dissipating side is further provided with a heat dissipating side outer edge, and the connecting ear is directed away from the notch from the outer edge of the heat dissipating side Extending, the connecting ear portion is provided with a connecting piece for connecting with the outside, and the notch does not exceed the connecting ear portion in the first direction.
5. The LED heat dissipation device according to claim 5, wherein the connecting ears are provided in two, and the two connecting ears are symmetrically arranged with respect to the heat dissipation groove.
The LED heat sink according to claim 6, wherein the connecting ear has a pressure-receiving surface facing the first direction and a reinforcing surface facing away from the pressure-receiving surface, and the connecting ear has a self-supporting surface. The raised reinforcing ribs on the reinforcing surface.
The LED heat sink of claim 7, further comprising a heat sink side surface, the heat collection side is connected to the heat dissipation side through the heat sink side surface, and the heat sink side surface is adjacent to the connecting ear Then, the reinforcing rib extends from the side surface of the heat dissipation device and penetrates the reinforcing surface.
5. The LED heat dissipation device of claim 4, wherein the heat dissipation fin structure extends from the bottom of the groove along the first direction to a position flush with the groove.
5. The LED heat dissipation device of claim 4, wherein the heat dissipation fin structures are arranged in an array.
The LED heat dissipation device of claim 10, wherein the heat dissipation fin structure includes a first fin group and a second fin group, the groove bottom has a groove bottom center, and the first fin group and the The second fin group is arranged symmetrically with respect to the center of the groove bottom.
11. The LED heat sink of claim 11, wherein the shape of the cross section of the first fin group and the second fin group perpendicular to the first direction are both V-shaped, and the V-shaped The top end points to the center of the groove bottom.
The LED heat sink of claim 12, wherein the protruding part is connected to the top end of the V-shape.
The LED heat dissipating device according to any one of claims 1 to 13, further comprising a through-hole waterproof structure, the heat collecting side is provided with a power through hole for passing through the LED power cord, and the power through hole penetrates On the heat dissipation side and the heat collection side, the through hole waterproof structure is arranged in the power through hole and fills the space between the LED power cord and the power through hole.
A lamp, comprising a lamp body, an LED light source, and the LED heat sink according to any one of claims 1 to 13, wherein the lamp body is provided with a penetrating installation cavity, and the installation cavity has a first opening and a distance away from each other. A second opening, the LED heat sink is fixed in the installation cavity with the heat collection side facing the first opening and the heat dissipation side facing the second opening, and the LED light source is fixed on the Collecting side.