CN217241224U

CN217241224U - Radiator and LED display module

Info

Publication number: CN217241224U
Application number: CN202220685991.1U
Authority: CN
Inventors: 李以华; 陈焕庭; 窦磊; 陈耀庭; 方森滨
Original assignee: Strait Cailiang Zhangzhou Photoelectric Co ltd
Current assignee: Strait Cailiang Zhangzhou Photoelectric Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-19
Anticipated expiration: 2032-03-28

Abstract

The utility model relates to the technical field of a heat dissipation structure of a light-emitting diode (LED) display module, and discloses a heat radiator, which comprises a base and a plurality of fins arranged side by side, wherein a gap is formed between any two adjacent fins, and a plurality of nail columns are distributed in each gap along the length direction; each nail column and each fin are fixedly connected with the base; the height of any fin along the length direction of the fin is constant, and at least two nail columns in at least one gap have different heights; the utility model also provides a LED module including above-mentioned radiator. The utility model provides a radiator and LED module, the radiating effect is better.

Description

Radiator and LED display module

Technical Field

The utility model belongs to the technical field of the LED display module heat radiation structure technique and specifically relates to a radiator and LED module are related to.

Background

The LED display industry, which is centered on green ecological lighting, is now accelerated in domestic development. With the development of miniaturization, miniaturization and integration of the LED display module, the LED display module tends to arrange more LED light sources in a smaller space, and meanwhile, the problem that the heat flux density in the LED display module is increased continuously is brought; the PN junction temperature in the LED display module is very sensitive to the change of the heat flow density, the display performance and the service life of the LED display module are further influenced, and efficient heat management is performed on the LED display module to effectively control the PN junction temperature at a light source.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a radiator and LED module to solve the problem that above-mentioned prior art exists, promote LED display module's radiating effect.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a radiator, which comprises a base and a plurality of fins arranged side by side, wherein a gap is formed between any two adjacent fins, and a plurality of nail posts are distributed in each gap along the length direction; each nail column and each fin are fixedly connected with the base; the height of any fin along the length direction of the fin is constant, and at least two nail columns in at least one gap have different heights.

Preferably, the base and/or each fin and/or each pin column are made of magnesium alloy.

Preferably, the base, the fins and the studs are made of magnesium alloy materials.

Preferably, at least two of said studs within each said gap have different heights.

Preferably, at least two of the posts within each of the gaps have different heights, and the heights between the fins are the same.

Preferably, at least two of the studs in each of the gaps have different heights and at least two of the fins have different heights.

Preferably, the number of the fins is ten, four nail columns are uniformly distributed in each gap, and the two middle nail columns in each gap have the same height and are higher than the heights of the rest nail columns in the gap; and the middle two of the nail columns in any gap have the same height as the middle two of the nail columns in other gaps.

Preferably, the two outermost posts in each gap have the same height, and the two outermost posts in any gap have the same height as the two outermost posts in other gaps.

Preferably, the stud is provided in a rectangular shape.

The utility model also provides a LED display module assembly, include as above the radiator.

The utility model discloses for prior art gain following technological effect:

the utility model provides a radiator, through set up a plurality of nail posts in the clearance between each fin, can destroy the air laminar flow state in the heat transfer process between the fin, strengthen the fluid disturbance, and then strengthen the heat transfer effect; and through set up the nail post of co-altitude not in the clearance, make and have the difference in height between the nail post of co-altitude not and with adjacent fin, can further strengthen the fluid disturbance, the torrent condition is more violent, and the heat transfer effect is better.

The utility model provides a LED display module assembly, including foretell radiator, possess better radiating effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an axial view of a heat sink according to an embodiment;

FIG. 2 is a schematic top view of the heat sink provided in FIG. 1;

FIG. 3 is a graph of thermal conductivity versus junction temperature for different materials;

figure 4 shows the weight of the heat sink for different materials.

Icon: 1-a radiator; 10-a base; 20-a fin; 30-clearance; 40-nail column.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the following detailed description.

Example one

The present embodiment provides a heat sink 1, please refer to fig. 1 and fig. 2, including a base 10 and a plurality of fins 20 arranged side by side, a gap 30 is formed between any two adjacent fins 20, and a plurality of studs 40 are arranged in each gap 30 along the length direction; each pin column 40 and each fin 20 are fixedly connected with the base 10; any of the fins 20 is of constant height along its length, with at least two of the posts 40 in at least one of the gaps 30 having different heights.

By arranging the plurality of pin columns 40 in the gaps 30 between the fins 20, the laminar flow state of air in the heat exchange process between the fins 20 can be damaged, the fluid disturbance is enhanced, and the heat exchange effect is further enhanced; and through set up the spike post 40 of different height in clearance 30, make the difference in height exist between the spike post 40 of different height and with adjacent fin 20, can further strengthen the fluid disturbance, the torrent condition is more violent, and the heat transfer effect is better.

Further, the studs 40 are provided as rectangular studs.

In an alternative to this embodiment, it is preferred that at least two of the posts 40 in each gap 30 have different heights; further enhancing the fluid disturbance, more violent turbulence condition and better heat exchange effect.

In the alternative to this embodiment, it is preferred that at least two of the studs 40 in each gap 30 have different heights, the same height between the fins 20, or different heights between at least two of the fins 20.

It should be noted that the number, height, and other dimensions of the studs 40 and the fins 20 need to be specifically determined according to the actual heat dissipation situation; the comparison can be simulated by different data combinations, for example:

when the radiator 1 comprises thirteen rows of fins 20, the length and the thickness of the fins are respectively 180mm and 2mm, the width of the gap 30 is 18mm, each gap 30 is provided with six rectangular nail posts 40, the side length is 8mm, and the distance between every two adjacent rectangular nail posts is 20 mm; by adjusting the heights of the studs 40 and the fins 20, the heat dissipation effect is analyzed:

1. when the height of each row of fins of the radiator 1 is 20mm and the height of each row of pin columns is 20mm, the average junction temperature of the LED display module is 66.40 ℃, and the highest junction temperature is 67.90 ℃;

2. when the height of each row of fins of the radiator 1 is 20mm, the height of the middle two nail columns in each gap is 20mm, the heights of the nail columns towards the outside are 25mm and 20mm in sequence, the average junction temperature of the LED display module is 67.50 ℃, and the highest junction temperature is 68.90 ℃;

3. when seven rows of fins in the center of the radiator 1 are 30mm high, the other six rows of fins are 20mm high, the heights of two nail columns in the middle of each gap are 20mm, the heights of the nail columns towards the outside are 15mm and 20mm in sequence, the average junction temperature of the LED display module is 63.50 ℃, the highest junction temperature is 65.90 ℃, and the like;

the size with the best heat dissipation effect is sought for different LED display modules by continuously adjusting the parameters; specifically, aiming at a display module model P2.5, a lamp bead model 1515 and an LED display module with a rated input of 220V-50HZ-2A, through the adjustment and optimization, a group of radiator parameters with a good radiating effect can be determined, and the method specifically comprises the following steps:

the number of the fins 20 is ten rows, four nail columns 40 are uniformly distributed in each gap 30, and two middle nail columns 40 in each gap 30 are the same in height and higher than the rest nail columns 40 in the gap 30; and the middle two studs 40 in any gap 30 have the same height as the middle two studs 40 in other gaps 30; further, the two outer studs 40 in each gap 30 have the same height, and the two outer studs 40 in any gap 30 have the same height as the two outer studs 40 in other gaps 30; the two outer studs 40 in each gap 30 are of the same height, and the two outer studs 40 in any gap 30 are of the same height as the two outer studs 40 in the other gaps 30.

Specifically, the length × thickness × width dimensions of the base 10 are 120mm × 2mm × 100mm in order, the length × thickness × height dimensions of each fin 20 are 100mm × 2mm × 40mm in order, the width of the gap 30 is 9.5mm, the side length of each rectangular stud 40 with a square cross section is 5mm, the distance between the studs is 12mm, the height of 40mm in the middle two studs is 40mm, the remaining studs 40 are 35mm, and the average temperature of the LED display module with the above parameters is 51.3 ℃ and the maximum temperature is 55.2 ℃.

Further, in order to analyze the influence of the heat conductivity of the material of the heat radiator 1 on the heat dissipation performance, the material of the heat radiator is respectively pure nickel, aluminum alloy, magnesium alloy, pure aluminum and pure copper, the heat conductivity and the junction temperature of the material of the heat radiator 1 are shown in fig. 3, as can be seen from fig. 3, the junction temperature of the chip of the LED display module decreases with the increase of the heat conductivity of the material of the heat radiator, and when the heat conductivity increases by 200W/mK, the decrease is very slow; however, referring to fig. 4, although the pure copper has the strongest heat dissipation effect, the weight of the heat sink is greatly increased, which does not meet the requirements of small volume and light weight of the heat dissipation system, and the magnesium alloy material has the lightest weight and also has the advantage of heat dissipation effect; therefore, magnesium alloy materials are considered comprehensively.

In the alternative of this embodiment, it is preferable that the base 10 and/or each fin 20 and/or each stud 40 be made of a magnesium alloy material.

Further, magnesium alloy materials are adopted for the base 10, the fins 20 and the studs 40.

Example two

The embodiment provides an LED display module, which includes the heat sink 1 provided in the first embodiment.

The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present description should not be construed as a limitation of the present invention.

Claims

1. A heat sink, comprising: the fin fixing structure comprises a base (10) and a plurality of fins (20) arranged side by side, wherein a gap (30) is formed between any two adjacent fins (20), and a plurality of studs (40) are distributed in each gap (30) along the length direction; each nail column (40) and each fin (20) are fixedly connected with the base (10); the height of any fin (20) along the length direction of the fin is constant, and at least two nail columns (40) in at least one gap (30) have different heights.

2. The heat sink of claim 1, wherein: the base (10) and/or each fin (20) and/or each nail column (40) are made of magnesium alloy materials.

3. The heat sink of claim 2, wherein: the base (10), the fins (20) and the studs (40) are made of magnesium alloy materials.

4. The heat sink of claim 1, wherein: at least two of the studs (40) within each of the gaps (30) have different heights.

5. The heat sink of claim 4, wherein: at least two of the studs (40) within each of the gaps (30) have different heights, and the fins (20) are of the same height.

6. The heat sink of claim 4, wherein: at least two of the studs (40) within each of the gaps (30) have different heights and at least two of the fins (20) have different heights.

7. The heat sink according to any one of claims 4-6, wherein: the number of the fins (20) is ten, and four nail columns (40) are uniformly distributed in each gap (30); the middle two studs (40) in each gap (30) have the same height and are higher than the rest studs (40) in the gap (30); and the middle two nail columns (40) in any gap (30) have the same height with the middle two nail columns (40) in other gaps (30).

8. The heat sink of claim 7, wherein: the two outermost studs (40) in each gap (30) are the same in height, and the two outermost studs (40) in any gap (30) are the same in height as the two outermost studs (40) in other gaps (30).

9. The heat sink of claim 1, wherein: the nail post (40) is rectangular.

10. The utility model provides a LED display module assembly which characterized in that: comprising a heat sink (1) according to any of claims 1-9.