WO2018171082A1

WO2018171082A1 - Heat dissipation apparatus and electronic device applying same

Info

Publication number: WO2018171082A1
Application number: PCT/CN2017/091657
Authority: WO
Inventors: 谭亮; 李屹
Original assignee: 深圳市光峰光电技术有限公司
Priority date: 2017-03-20
Filing date: 2017-07-04
Publication date: 2018-09-27
Also published as: CN207124834U

Abstract

Disclosed is a heat dissipation apparatus comprising a housing and a heat dissipation component, wherein the heat dissipation component is mounted inside the housing, and the housing is provided with an air inlet and an air outlet thereon; the heat dissipation component comprises multiple sequentially arranged fins, and the heights of the ends of the multiple fins sequentially decrease in a direction towards the air outlet. During operation of the heat dissipation apparatus, air flows between two adjacent fins from the air inlet and then is discharged from the air outlet after flowing through the ends of the fins. Since the heights of the ends of the multiple fins sequentially decrease in a direction towards the air outlet, fins of non-uniform heights are adjacent to each other; when cold air enters from the air inlet, hot air located near the shorter fins is quickly driven out of the heat dissipation apparatus due to the non-uniform height of the fins, thus forming multiple air flows above the fins, speeding up the cooling of the heat dissipation apparatus and increasing heat dissipation efficiency. An electronic device comprising the described heat dissipation apparatus is further disclosed.

Description

Radiator and its applied electronic equipment

Technical field

The utility model relates to the technical field of component heat dissipation, in particular to a heat sink. The utility model also discloses an electronic device comprising the above heat sink.

Background technique

Some devices generate a lot of heat when they work. In order to dissipate excess heat as quickly as possible, heat is usually set by setting a heat sink.

As shown in FIG. 1 and FIG. 2, the conventional heat sink includes a casing 06, an air extracting device 04, and a heat dissipating component installed in the casing 06. The casing 06 is provided with an air inlet 01 and an air outlet 05, and the air extracting device 04 is mounted on the casing 06. Above, the gas passing through the heat dissipating member is pumped to the air outlet 05 for discharge. The heat dissipating component comprises a plurality of fins 02 arranged in sequence, and the free ends of the fins 02 are flush, that is, the heights of the fins 02 are the same, the heat dissipation channels are formed between the adjacent two fins 02, and the air outlets 05 are located on the side of the fins 02. . When the heat sink is in operation, the heat source 03 flows in the fins 02, and the cold air enters through the air inlet 01 by the air blower 05. After passing through the heat radiating member, the gas passes through the free end of the fin 02 and is discharged through the air outlet 05.

technical problem

However, since the free ends of the fins 02 are flush, the fins 02 in the direction in which the airflow flows from the outlet of the fins 02 to the fan and the height thereof extend in a substantially right angle, so that the airflow is easily unobstructed, and the air extracting device 04 The formed airflow generates a large wind resistance, which in turn makes the heat dissipation efficiency of the heat sink low.

Therefore, how to improve the heat dissipation efficiency of the heat sink is a technical problem to be solved by those skilled in the art.

Technical solution

The purpose of the utility model is to provide a heat sink whose heat dissipation efficiency is improved. Another object of the present invention is to provide an electronic device including the above heat sink.

To achieve the above object, the present invention provides a heat sink including a housing and a heat dissipating component, wherein the heat dissipating component is mounted in the housing, the housing is provided with an air inlet and an air outlet, and the heat dissipating component includes a plurality of The fins arranged in sequence, the free ends of the plurality of fins are sequentially lowered in height in the direction of the air outlet.

Preferably, a heat source thermally coupled to the heat dissipating member is further included.

Preferably, the difference in height between adjacent two of the fins is equal, and the spacing between adjacent two of the fins is equal.

Preferably, the air inlet is opposite to the air inlet end of the fin.

Preferably, further comprising a drafting device installed in the outer casing, the air extracting device is located between the heat dissipating member and the air outlet.

Preferably, the air extraction device is a fan.

Preferably, the plurality of fins have the same width, the plurality of fins are arranged in parallel, and the side ends of the plurality of fins are flush.

Preferably, the fins are secured by threaded fasteners.

Preferably, the end faces of at least two of said fins are thermally coupled to said heat source.

An electronic device comprising a heat sink, the heat sink being the heat sink of any of the above.

In the above technical solution, the heat sink provided by the utility model comprises a casing and a heat dissipating component, wherein the heat dissipating component is installed in the casing, the casing is provided with an air inlet and an air outlet, and the heat dissipating component comprises a plurality of fins arranged in sequence, and a plurality of The free ends of the fins are sequentially lowered in height in the direction of the air outlet. When the heat sink is working, the airflow enters between the adjacent two fins through the air inlet, and then passes through the free end of the fin and is discharged through the air outlet.

Beneficial effect

It can be seen from the above description that in the heat sink provided by the present invention, the free ends of the plurality of fins are sequentially lowered in height in the direction of the air outlet, forming fins of different heights, and the cold airflow enters from the air inlet due to the fin height. In addition, the hot air at the short fins is quickly taken out of the radiator, and multiple air flows are formed above the fins to accelerate the cooling of the radiator and improve the heat dissipation efficiency.

DRAWINGS

1 is a schematic structural view of a conventional heat sink;

Figure 2 is a gas flow diagram of a conventional heat sink;

3 is a schematic structural view of a heat sink according to an embodiment of the present invention;

4 is a gas flow diagram of a heat sink according to an embodiment of the present invention.

In Figure 1-4: 01-air inlet, 02-fin, 03-heat source, 04-exhaust device, 05-air outlet, 06-shell;

1-air inlet, 2-fin, 3-heat source, 4-exhaust device, 5-outlet, 6-shell.

BEST MODE FOR CARRYING OUT THE INVENTION

The core of the utility model provides a heat sink, and the heat dissipation efficiency of the heat sink is improved. Another core of the present invention is to provide an electronic device including the above heat sink.

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to FIG. 3 and FIG. 4 , in a specific embodiment, the heat sink provided by the embodiment of the present invention includes a housing 6 and a heat dissipating component mounted in the housing 6 . Specifically, the heat sink further includes The heat source 3 is thermally connected to the heat source 3, and the heat source 3 is disposed in the casing 6. Of course, the heat source may be disposed independently of the heat sink, disposed in the casing 6 in use, and thermally connected to the heat sink member. The outer casing 6 is provided with an air inlet 1 and an air outlet 5, and the heat dissipating member comprises a plurality of fins 2 arranged in sequence, and the free ends of the plurality of fins 2 are sequentially lowered in height in the direction of the air outlet 5, and the radiator is in the top fin 2 A portion is chamfered (i.e., the free ends of the fins 2 are integrally disposed to be inclined toward the airflow direction). The heat source 3 and the heat dissipating component are filled with a thermal pad, and the heat source 3 can be thermally connected to one of the fins 2. In order to improve the working efficiency, preferably, the end faces of the at least two fins 2 are thermally connected to the heat source 3, and more preferably The flow direction in the heat source 3 is perpendicular to the direction in which the fins 2 are arranged. Specifically, the outer casing 6 may be a separate housing of the heat sink or a housing on a specific application machine, such as a projector housing. In order to improve the working efficiency of the heat sink, it is preferable that the air inlet 1 is located at the bottom of the outer casing 6.

When the heat sink is working, the heat generated by the heat source 3 is transmitted to the heat sink by conduction. In the present invention, the heat source 3 adopts DMD, and the airflow enters between the adjacent two fins 2 through the air inlet 1 Then, it passes through the free end of the fin 2 and is discharged through the air outlet 5.

As can be seen from the above description, in the heat sink provided by the embodiment of the present invention, the free ends of the plurality of fins 2 are sequentially lowered in height in the direction of the air outlet 5, and the fins 2 having inconsistent heights are formed, and the cold airflow is advanced. The tuyere 1 enters, because the height of the fins 2 is different, the hot airflow at the short fins is quickly taken out of the radiator, and a plurality of air flows are formed above the fins 2 to accelerate the cooling of the radiator and improve the heat dissipation efficiency.

On the other hand, it can slow down the aging process of components and improve the life of the product. At the same time, due to more integration, the overall size of the heat sink is reduced and the competitiveness of the product is improved.

In order to make the flow rate of the exhaust gas from the heat dissipation passages substantially the same, it is preferable that the difference in height between the adjacent two fins 2 is equal. More preferably, the spacing of adjacent two fins 2 is equal.

Preferably, the air inlet 1 is opposite to the air inlet end of the fin 2. When the radiator is working, the cold air can enter the position of the fin 2 for the first time, further improving the working efficiency.

Further, the heat sink further includes a draft device 4 installed in the outer casing 6, and the air extracting device 4 is located between the heat radiating member and the air outlet 5 in the flow direction of the airflow. More preferably, the air extracting device 4 is a fan. Under the driving of the air extracting device 4, the hot air flow at the short fins is quickly taken out of the system, and a plurality of air flows are formed above the fins 2 to accelerate the cooling of the heat sink and improve the heat dissipation efficiency. The fan draws a cold airflow from the air inlet 1 at the bottom of the system casing 6, and the cold airflow absorbs the heat through the radiator, and then the fan exhausts the system air outlet 5, thereby achieving the purpose of reducing the temperature of the heat source 3.

In order to facilitate the stable movement of the airflow, preferably, the plurality of fins 2 have the same width, the plurality of fins 2 are arranged in parallel, and the side ends of the fins 2 are flush, that is, the plurality of fins 2 are arranged in a row, and the fins are arranged. The sides of the sheet 2 are on the same plane.

In addition to the above aspects, in order to facilitate the disassembly and assembly of the fins 2 by the worker, it is preferable that the fins 2 are fixed by screw fasteners.

An electronic device provided by the present application includes a heat sink, wherein the heat sink is any one of the above heat sinks, and the electronic device may be a projector, a physical experiment instrument, etc., of course, in actual use, it may be other device.

+

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the scope of the invention.

Claims

A heat sink comprising a casing (6) and a heat dissipating component mounted in the casing (6), the casing (6) being provided with an air inlet (1) and an air outlet (5) The heat dissipating member includes a plurality of fins (2) arranged in sequence, wherein the free ends of the plurality of fins (2) are sequentially lowered in height in the direction of the air outlet (5).

2. A heat sink according to claim 1 further comprising a heat source (3) thermally coupled to said heat dissipating component.

3. A heat sink according to claim 1, characterized in that the height difference between two adjacent fins (2) is equal and the spacing between two adjacent fins (2) is equal.

4. Radiator according to claim 1, characterized in that the air inlet (1) is facing the air inlet end of the fin (2).

The heat sink according to claim 1, further comprising a drafting device (4) mounted in the outer casing (6), the air extracting device (4) being located in the heat dissipating member Between the air outlet (5) and the air outlet (5).

6. Radiator according to claim 5, characterized in that the drafting device (4) is a fan.

The heat sink according to claim 1, wherein the plurality of fins (2) have the same width, the plurality of fins (2) are arranged in parallel, and the plurality of fins (2) The side ends are flush.

8. A heat sink according to claim 1 wherein the fins (2) are secured by threaded fasteners.

A heat sink according to any of claims 1-8, characterized in that the end faces of at least two of said fins (2) are thermally connected to said heat source (3).

An electronic device comprising a heat sink, characterized in that the heat sink is the heat sink according to any one of claims 1-9.