Cooling fin and heat dissipation optical module

Abstract

The utility model discloses a radiating fin and a radiating optical module, and the radiating fin comprises a plate body, the plate body is provided with a main channel along the length direction of the plate body, and is provided with a plurality of branch channels communicated with the main channel along the width direction of the plate body. And the branch channels can be used for guiding the flow passing through the main channel to the side surface of the plate body and outputting the flow. The radiating fin adopts a multi-channel structure, a medium enters the plate body through the main channel and can be output from the main channel and the branch channels of the plate body, and meanwhile, by changing the sectional area of the branch channels, the medium can form eddy flow in the channels to quickly flow, so that the heat exchange process with higher efficiency is realized; according to the heat dissipation optical module, the heat dissipation fins are arranged in the cavity, and the heat dissipation effect is further enhanced through airflow acceleration of the air guide port and the air inlet while the heat dissipation optical module makes contact with the PCB and dissipates heat through airflow acceleration.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, and particularly relates to a heat sink and a heat dissipation optical module. Background Art

[0002] At present, with the rapid development of communication technology, communication devices based on AI have higher requirements for the data transmission capacity of optical modules. High-speed optical modules more often adopt highly integrated and high-power-consuming components, which bring higher power consumption and heat. However, due to the characteristics of miniaturization and standardization of the optical module itself, it is difficult to assist heat dissipation through externally connected active heat dissipation devices. At the same time, since optical modules mostly work in clusters such as switches / servers, higher requirements are put forward for the passive heat dissipation ability of the optical module itself under actual harsh working environments and space requirements.

[0003] At present, heat sinks have been arranged in the optical module to contact the PCB board, and the heat dissipation effect is enhanced through contact and air flow. However, most of the current heat sinks are plate-shaped or fin structures, which can only increase the heat dissipation area, and the heat dissipation effect is still poor. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a heat sink and a heat dissipation optical module with good heat dissipation effect.

[0005] To solve the above technical problem, the utility model adopts the following technical scheme: a heat sink includes a plate body, a main channel is opened along the length direction of the plate body, and a plurality of branch channels communicating with the main channel are opened along the width direction of the plate body, and the branch channels can drain the air passing through the main channel to the side of the plate body for output.

[0006] Further, the cross-sectional area of the branch channel gradually decreases along the air outlet direction.

[0007] A heat dissipation optical module includes a base, an upper cover covering the base, and a PCB board disposed between the base and the upper cover, and further includes the heat sink, and the heat sink is disposed between the PCB board and the base and is in contact with both;

[0008] And the base and the upper cover form a cavity through which air can pass, and the air inlet of the cavity is located at the optical port end and the air outlet is located at the electrical port end.

[0009] Further, it further includes two air guiding blocks respectively disposed on both sides of the air inlet, and a plurality of air guiding openings are respectively opened on the air guiding blocks.

[0010] Further, the cross-sectional area of the air guiding opening gradually decreases from outside to inside.

[0011] Further, a partition block that divides the air outlet into two parts is provided on the base, and arc-shaped grooves that can guide the airflow passing through the air guide opening into the cavity are respectively formed on both sides of the partition block.

[0012] Further, the cross-sectional area of the partition block gradually increases from outside to inside.

[0013] Further, it also includes a pull ring connected to the two air guide blocks.

[0014] The beneficial effects of the present utility model are embodied in:

[0015] The heat sink and heat dissipation optical module of the present utility model:

[0016] The heat sink adopts a multi-channel structure. The medium enters the plate body through the main channel and can be output through the main channel and branch channels of the plate body. At the same time, by changing the cross-sectional area of the branch channels, the medium can form eddy currents and flow rapidly in the channels, realizing a more efficient heat exchange process;

[0017] The heat dissipation optical module is equipped with a heat sink in the cavity. While dissipating heat by contacting the PCB board and increasing the airflow speed, the heat dissipation effect is further enhanced by increasing the airflow speed at the air guide opening and the air inlet. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the heat sink of the present utility model;

[0019] Figure 2 is an exploded view of the structural diagram of the heat dissipation optical module of the present utility model;

[0020] Figure 3 is a cross-sectional view of the structural diagram of the heat dissipation optical module of the present utility model;

[0021] Figure 4 is a schematic structural diagram of the base of the present utility model.

[0022] The labels of each component in the drawings are: 1, plate body; 101, main channel; 102, branch channel; 2, base; 3, upper cover; 4, PCB board; 5, air guide block; 501, air guide opening; 6, partition block; 601, arc-shaped groove; 7, pull ring; 8, diversion platform; A, cavity; A1, air inlet; A2, air outlet. Detailed Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0024] The heat sink of the present utility model is shown in Figure 1 , and includes a plate body 1. The plate body 1 is provided with a main channel 101 along its own length direction and a plurality of branch channels 102 connected to the main channel 101 along its own width direction, and the branch channels 102 can drain the medium passing through the main channel 101 to the side of the plate body 1 for output. With such a design, through the multi-channel structure, the medium enters the plate body 1 through the main channel, and can be output through the main channel 101 and the branch channels 102 of the plate body 1, increasing the heat dissipation area and increasing the path length of the medium passing through through the branch channels 102, thereby improving the heat dissipation effect.

[0025] In this embodiment, as shown in Figure 1 , the cross-sectional area of the branch channel 102 gradually decreases along the air outlet direction. With such a design, by changing the cross-sectional area of the branch channel 102, the medium can form a vortex flow in the channel for rapid flow, realizing a higher-efficiency heat exchange process. And in this embodiment, the branch channel 102 has a structure similar to the Chinese character "mountain".

[0026] The heat dissipation optical module of the present utility model is shown in Figure 2 、 3 , and includes a base 2, an upper cover 3 covering the base 2, and a PCB board 4 disposed between the base 2 and the upper cover 3. It further includes the heat sink described above, and the heat sink is disposed between the PCB board 4 and the base 2 and is in contact with both of them;

[0027] And the base 2 and the upper cover 3 form a cavity A through which air can pass, and the air inlet A1 of the cavity A is located at the optical port end and the air outlet A2 is located at the electrical port end. With such a design, by equipping the heat sink in the cavity A, a part of the air flow directly convects and exchanges heat with the surface of the PCB board 4 and the heat sink in the cavity A, and another part enters the heat sink through the main channel 101 to achieve heat dissipation, improving the heat dissipation effect of the optical module. And in this embodiment, the heat sink is made of aluminum material, and the channels 101 and branch channels 102 of the heat sink are exposed and opened. The closed surface of the heat sink is connected to the PCB board 4 through a high thermal conductivity heat dissipation gel / gasket, and the exposed surface is in contact with the base 2.

[0028] In this embodiment, as shown in Figure 2, further comprising two air guiding blocks 5 respectively disposed on both sides of the air inlet A1, and a plurality of air guiding openings 501 are respectively formed on the air guiding blocks 5. With such a design, when the optical module works, air flow can enter the cavity A from the side through the air guiding openings 501.

[0029] In this embodiment, referring to Figure 2 , the cross-sectional area of the air guiding opening 501 gradually decreases from outside to inside. With such a design, the air flow velocity of the air entering the cavity A from the external environment is accelerated, the convective effect between the air flow and the heat of the device is enhanced, and rapid heat dissipation between the heat-generating device and the cavity A is achieved.

[0030] In this embodiment, referring to Figure 2 、 3 , a partition block 6 that divides the air outlet A2 into two parts is further provided on the base 2, and arc-shaped grooves 601 that can guide the air flow passing through the air guiding openings 501 into the cavity A are respectively formed on both sides of the partition block 6. With such a design, the air entering the cavity A through the air guiding openings 501 is guided along the concave surface of the arc-shaped groove 601 into the cavity A, that is, the external wind perpendicular to the module is guided to the working direction of the module, and finally, after passing through the cavity A and the heat sink, it is output from the air outlet A2, releasing the heat to the external environment, ensuring the consistency between the wind direction and the working heat dissipation direction, and improving the heat exchange efficiency; and among them, referring to Figure 3 , a diversion platform 8 for guiding the air flow into the main channel 101 is further provided in the base 2.

[0031] In this embodiment, referring to Figure 4 , the cross-sectional area of the partition block 6 gradually increases from outside to inside. With such a design, the cross-sectional areas of the two branch openings of the air inlet A1 gradually become smaller, further accelerating the air flow velocity.

[0032] In this embodiment, referring to Figure 3 , it further comprises a pull ring 7 connected to the two air guiding blocks 5. With such a design, it is convenient for the pulling operation of the optical module.

[0033] Finally, it should be noted that the subsequent heat dissipation optical module of the present application includes but is not limited to other changes based on this requirement, for example: adding an active heat dissipation device to the existing structure to further enhance the heat dissipation capacity, etc.

[0034] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, "a plurality of" means two or more. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] It should be understood that the examples and embodiments described herein are only for illustration and are not intended to limit the present utility model. Those skilled in the art can make various modifications or changes according to it. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of protection of the present utility model.

Claims

1. A heat sink, characterized in that: The plate body (1) comprises a main channel (101) formed along its length direction and a plurality of branch channels (102) connected to the main channel (101) formed along its width direction, wherein the branch channels (102) can guide the fluid passing through the main channel (101) to the side of the plate body (1) for output.

2. The heat sink according to claim 1, characterized in that: The cross-sectional area of ​​the branch channel (102) gradually decreases along the air outlet direction.

3. A heat dissipation optical module, comprising a base (2), an upper cover (3) covering the base (2), and a PCB board (4) arranged between the base (2) and the upper cover (3), characterized in that: It also comprises a heat sink as claimed in claim 1 or 2, wherein the heat sink is arranged between the PCB board (4) and the base (2) and is in contact with both of them; The base (2) and the upper cover (3) form a cavity (A) through which air can pass, and the air inlet (A1) of the cavity (A) is located at the optical port end, and the air outlet (A2) is located at the electrical port end.

4. The heat dissipation optical module according to claim 3, characterized in that: It also comprises two air guide blocks (5) respectively arranged on both sides of the air inlet (A1), and the air guide blocks (5) are respectively provided with a plurality of air guide ports (501).

5. The heat dissipation optical module according to claim 4, characterized in that: The cross-sectional area of ​​the air guide port (501) gradually decreases from the outside to the inside.

6. The heat dissipation optical module according to claim 4 or 5, characterized in that: The base (2) is also provided with a partition block (6) for dividing the air outlet (A2) into two, and arc-shaped grooves (601) are respectively provided on both sides of the partition block (6) for guiding the airflow passing through the air guide port (501) into the cavity (A).

7. The heat dissipation optical module according to claim 6, characterized in that: The cross-sectional area of ​​the spacer (6) gradually increases from the outside to the inside.

8. The heat dissipation optical module according to claim 4, characterized in that: It also includes a pull ring (7) connected to the two air guide blocks (5).

Images