Optical module liquid cooling heat dissipation module

Abstract

The utility model discloses a liquid-cooling heat dissipation module of an optical module. The liquid-cooling heat dissipation module comprises a liquid-cooling liquid separator and a liquid-cooling cold head, the liquid-cooling liquid separator is arranged on a printed circuit board in the switch, a liquid separator water inlet and a liquid separator water outlet are formed in one side of a liquid-cooling liquid separator body, a plurality of liquid separator sockets used for being connected with a liquid-cooling cold head are formed in the other side of the liquid-cooling liquid separator body in parallel, and the liquid separator sockets comprise the first liquid separator socket and the second liquid separator socket; one side of the liquid cooling head is provided with a liquid cooling plug, and the liquid cooling plug comprises a first liquid cooling plug connected with the first liquid separator jack and a second liquid cooling plug connected with the second liquid separator jack; the liquid-cooling cold head is arranged between the mounting intervals of the adjacent optical fiber cages; and a third cooling liquid pipeline communicated with the first liquid cooling plug and the second liquid cooling plug is arranged in the liquid cooling head. The temperature of the optical fiber module is effectively reduced by using the liquid cooling technology on the premise of not changing the form architecture of the existing switch, energy is saved, noise is reduced, and stable operation of the switch is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of switch cooling, in particular to a liquid cooling heat dissipation module for optical modules. BACKGROUND

[0002] In recent years, with the rapid development of cloud computing, big data, AIGC and other technologies, the horizontal data transmission volume in the data center has shown explosive growth. Corresponding to the increasingly fast transmission rate is the continuously rising power consumption of optical modules. In order to achieve higher transmission performance, the power consumption of high-speed optical modules continues to rise, and the power consumption of an 800G optical module is usually more than 25W. The high-density port layout of the high-speed optical interface on the front panel of the switch further aggravates the focusing of power consumption inside the switch. Excessive power density will cause heat to accumulate rapidly, and if effective heat dissipation is not achieved, the temperature of the chip will rise sharply, seriously affecting the performance and service life of the optical module. High temperature will cause the characteristics of optoelectronic devices to drift, such as changes in laser threshold current and decreases in detector responsivity, resulting in degradation of optical signal quality and increases in bit error rate.

[0003] The front panel of the switch is resource-constrained, and it is difficult to have enough space for laying out heat dissipation holes under the high-density port layout. The traditional air-cooled heat dissipation is gradually pushed to the limit in the narrow space, and the existing switch usually adopts a riding type optical module liquid cooling heat dissipation module, as shown in FIG. 1, which can only adopt a 1*n single-layer optical fiber cage due to structural interference, and other structural members such as light guide columns and air-cooled fins cannot be installed on the upper part of the optical fiber cage. Figure 1 The utility model discloses a liquid cooling heat dissipation module for optical modules. The utility model discloses a liquid cooling heat dissipation module for optical modules.

[0004] In order to solve the above problems, the present application provides a liquid cooling heat dissipation module for optical modules, which comprises: a liquid cooling distributor and a liquid cooling cold head; the liquid cooling distributor is arranged on a printed circuit board in the switch, one side of the liquid cooling distributor body is provided with a distributor water inlet and a distributor water outlet, and the other side is provided in parallel with a plurality of distributor sockets connected with the liquid cooling cold head; the distributor socket comprises a first distributor socket connected with the distributor water inlet through a first cooling liquid pipeline and a second distributor socket connected with the distributor water inlet through a second cooling liquid pipeline; one side of the liquid cooling cold head is provided with a liquid cooling plug, the liquid cooling plug comprises a first liquid cooling plug connected with the first distributor socket and a second liquid cooling plug connected with the second distributor socket; the liquid cooling cold head is arranged between adjacent optical fiber cage installation intervals; the liquid cooling cold head is internally provided with a third cooling liquid pipeline communicating the first liquid cooling plug and the second liquid cooling plug.

[0005] In one example, a heat-conducting pad is arranged between the optical fiber cage and the liquid cooling cold head.

[0006] In one example, the heat-conducting pad is made of at least one of silicone rubber material or polyurethane material.

[0007] In one example, the liquid-cooled plug is a liquid-cooled floating blind-mole connector.

[0008] In one example, the liquid-cooled distributor has nine distributor ports arranged in parallel.

[0009] In one example, the optical module liquid cooling heat dissipation module is used to cool the 2*2 fiber optic cage under the 400G port or 800G port.

[0010] The method proposed in this application can bring the following beneficial effects:

[0011] 1. Interval-mounted liquid cooling heads avoid interference with the light guides, air-cooled heat sinks, and other structures on top of the fiber optic cage, facilitating the use of fiber optic cage materials with indicator lights and enhanced heat dissipation. Liquid cooling technology can effectively reduce the temperature of fiber optic modules, saving energy and reducing noise, and ensuring stable switch operation without altering the existing switch architecture.

[0012] 2. By setting up thermal pads, the thermal resistance between the fiber optic cage and the liquid cooling head is reduced.

[0013] 3. Setting the liquid cooling plug as a liquid cooling floating blind plug allows the liquid cooling plug to move slightly left, right, up, and down within a certain range, making it easier for the liquid cooling head to connect with it, reducing installation difficulty and improving the overall assembly convenience. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the installation of a riding-type optical module liquid cooling heat dissipation module in the prior art according to an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the installation of a liquid-cooled heat dissipation module for an optical module in an embodiment of this application;

[0017] Figure 3 This is a schematic diagram of a liquid-cooled heat dissipation module for an optical module according to an embodiment of this application;

[0018] Figure 4 This is a schematic diagram showing the disassembly of a liquid-cooled heat dissipation module for an optical module in an embodiment of this application.

[0019] Among them, 1. Printed circuit board, 2. Fiber optic cage, 3. Liquid-cooled distributor, 4. Liquid-cooled cold head, 5. Distributor inlet, 6. Distributor outlet, 7. Distributor socket, 8. Liquid-cooled plug. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the overall concept of the present application, the following detailed description will be made with reference to the accompanying drawings.

[0021] The terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the order thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0022] In order to clearly illustrate the technical features of the present application, the following will be described in detail through specific embodiments, and in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific embodiments of the present application will be described with reference to the accompanying drawings, and the same reference numerals in the drawings represent the same or similar parts with the same function.

[0026] In order to make the drawing simple, only the parts related to the present application are schematically represented in the drawings, which do not represent the actual structure of the product.

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] Figure 1For the prior art riding type optical module liquid cooling heat dissipation module, as shown in Figure 1 , Figure 1 The left copper bar is used for cooling the optical fiber cage. Due to structural interference, only a single-layer optical fiber cage of 1*n can be used, and other structural components such as light guide columns and air-cooled fins cannot be installed on the upper part of the optical fiber cage.

[0029] As shown in Figure 2 , Figure 3 and Figure 4 , the embodiment of the present application provides a liquid cooling heat dissipation module for an optical module, comprising a liquid cooling distributor 3 and a liquid cooling cold head 4. The liquid cooling distributor 3 is arranged on a printed circuit board 1 in the switch, one side of the body of the liquid cooling distributor 3 is provided with a distributor water inlet 5 and a distributor water outlet 6, and the other side is provided in parallel with a plurality of distributor sockets 7 connected to the liquid cooling cold head 4. The distributor socket 7 includes a first distributor socket 7 connected to the distributor water inlet 5 through a first cooling liquid pipeline, and a second distributor socket 7 connected to the distributor water inlet 5 through a second cooling liquid pipeline; one side of the liquid cooling cold head 4 is provided with a liquid cooling plug 8, which includes a first liquid cooling plug 8 connected to the first distributor socket 7, and a second liquid cooling plug 8 connected to the second distributor socket 7; the liquid cooling cold head 4 is arranged between the installation intervals of adjacent optical fiber cages 2; the liquid cooling cold head 4 is provided with a third cooling liquid pipeline communicating the first liquid cooling plug 8 and the second liquid cooling plug 8. Unlike the conventional riding type liquid cooling plate installation method, the interval installation type liquid cooling head can avoid interference with the light guide column, air-cooled heat dissipation fin and other structures on the top of the optical fiber cage 2, and facilitate the use of optical fiber cage 2 materials with indicator lights and enhanced heat dissipation.

[0030] The liquid cooling cold head 4 is provided as a blind plug type detachable structure, which is convenient for later maintenance and replacement. In the prior art, the copper pipe series connection method is commonly used in the conventional riding type liquid cooling plate of the optical module. Since the intelligent computing center switch often needs to be fully inserted into the port, the series type water cooling liquid path will cause the heat dissipation capacity to be strong near the water inlet, the water temperature to be high near the water outlet, and the heat dissipation to be poor, which may cause thermal failure of the fixed area optical module on the switch. The present application adopts a parallel type liquid cooling distributor 3, which uniformly arranges liquid cooling quick plug interfaces at the front end of the distributor. After being connected to the liquid cooling cold head 4, the optical module heat absorbed by the cold head can be quickly and effectively uniformly discharged.

[0031] The liquid cooling cold head 4 is composed of a supporting aluminum plate and an internal copper pipe water path. For the current 400G / 800G optical module product, a simple U-shaped copper pipe water path can meet the heat dissipation requirements. In the future, when higher power optical modules are applied, the liquid cooling cold head 4 can be upgraded to a fin type or a cylindrical type and other high cooling efficiency cold plate forms.

[0032] In one embodiment, a heat-conducting pad is arranged between the optical fiber cage 2 and the liquid cooling cold head 4 to reduce the thermal resistance between the optical fiber cage 2 and the liquid cooling cold head 4.

[0033] In one embodiment, the heat-conducting pad is made of silicone rubber or polyurethane material, and the specific thermal conductivity is selected according to the specific thermal design, and the main purpose is to reduce the thermal resistance between the outer wall of the optical fiber cage 2 and the liquid cooling head 4, and improve the heat dissipation effect.

[0034] In one embodiment, the liquid cooling plug 8 is a liquid cooling floating blind plug connection plug. The liquid cooling plug 8 can be slightly moved up and down within a certain range, so as to facilitate the liquid cooling head to be connected, reduce the installation difficulty, and improve the assembly convenience of the whole machine.

[0035] In one embodiment, the liquid cooling distributor 3 is provided with 9 groups of distributor sockets 7 in parallel, and can be combined with 8 groups of 2*2 optical fiber cages 2 to complete the heat dissipation requirement of 32 high-speed optical modules. It is consistent with the current commonly used 64*800G (2U device) and 128*400G (4U device) single row maximum 32 ports. The device with less port arrangement can reduce the number of liquid cooling quick plug interfaces at the front end of the liquid cooling distributor 3.

[0036] The above specific embodiments cannot be regarded as a limitation on the protection scope of the utility model, and any alternative improvement or change made by the person skilled in the art to the embodiments of the utility model falls within the protection scope of the utility model.

[0037] The parts not described in the utility model are the known technology of the person skilled in the art.

Claims

1. A liquid-cooled heat dissipation module for optical modules, characterized in that, include: Liquid-cooled distributor and liquid-cooled cold head; The liquid-cooled distributor is mounted on a printed circuit board inside the switch. One side of the liquid-cooled distributor body is provided with a distributor inlet and a distributor outlet, and the other side is provided with multiple distributor ports for connecting to the liquid-cooled cold head. The distributor ports include a first distributor port connected to the distributor inlet through a first coolant pipe, and a second distributor port connected to the distributor inlet through a second coolant pipe. A liquid cooling plug is provided on one side of the liquid cooling head. The liquid cooling plug includes a first liquid cooling plug connected to the first liquid distributor socket and a second liquid cooling plug connected to the second liquid distributor socket. The liquid cooling head is disposed between the installation intervals of adjacent fiber optic cages. A third coolant pipeline connecting the first liquid cooling plug and the second liquid cooling plug is provided inside the liquid cooling head.

2. The optical module liquid cooling heat dissipation module according to claim 1, characterized in that, A thermal pad is provided between the fiber optic cage and the liquid cooling head.

3. The optical module liquid cooling heat dissipation module according to claim 1, characterized in that, The thermal pad is made of at least one of silicone rubber or polyurethane materials.

4. The optical module liquid cooling heat dissipation module according to claim 1, characterized in that, The liquid-cooled plug is a liquid-cooled floating blind-plug connector.

5. The optical module liquid cooling heat dissipation module according to claim 1, characterized in that, The liquid-cooled separator is provided with nine separator ports in parallel.

6. The optical module liquid cooling heat dissipation module according to claim 1, characterized in that, The liquid cooling heat dissipation module of the optical module is used to cool the 2*2 fiber cage under the 400G port or 800G port.

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