Water-cooling heat dissipation device for high-power optical module

Abstract

The utility model discloses a high-power optical module water-cooling heat radiation device, which relates to the technical field of switch heat radiators, comprises a water-cooling module which is arranged on an optical cage of a PCB (Printed Circuit Board), and is characterized in that the water-cooling module consists of a water-cooling box and a plurality of water-cooling pipes connected to the water-cooling box; an independent water inlet tank and an independent water outlet tank are arranged in the water cooling tank, a water inlet end and a water outlet end which are communicated with the water inlet tank and the water outlet tank are respectively arranged at two ends of the water cooling tank, a plurality of water inlets are formed in the water inlet tank, and a plurality of water outlets are formed in the water outlet tank; a long-strip-shaped opening is formed in the position, located at each channel, of the optical cage, an optical module water-cooling plate is fixed to each opening, a water-cooling pipe is fixed to the optical module water-cooling plate in the length direction, one end of the water-cooling pipe is connected with a water inlet, and the other end of the water-cooling pipe is connected with a water outlet. According to the utility model, the heat dissipation problem of the high-power optical module can be effectively solved, the heat dissipation efficiency of the water-cooling module is improved, and the working performance of the high-power optical module is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch radiators, and particularly relates to a water-cooling heat dissipation device for high-power optical modules. Background Art

[0002] With the upgrading of switch devices, the demand for high-speed communication optical modules in switches is increasing day by day. Currently, 400G / 800G high-power optical modules have been widely used, and the power consumption of a single module has even exceeded 20W. Its heat dissipation has gradually become the bottleneck of the overall heat dissipation of the switch.

[0003] Regarding the heat dissipation of high-power optical modules, the common measures are to increase the size of the radiator and use high-performance fans. However, for some application scenarios of switches with space limitations and noise requirements, it is impossible to infinitely increase the size of the radiator and the rotation speed of the fan. The heat dissipation capacity is limited by increasing the size of the radiator or the rotation speed of the fan. For example, Figure 1 In the scheme of increasing the size of the radiator shown, the size has been increased to the limit, but the heat dissipation requirement still cannot be met; as Figure 2 In the scheme of using ordinary heat pipe heat conduction and water cooling shown, the heat is conducted to the water-cooling plate through the heat pipe for heat dissipation. Due to the too long heat conduction path, the heat dissipation problem cannot be effectively solved. Therefore, a new heat dissipation scheme is urgently needed to meet this heat dissipation requirement scenario with space limitations and noise requirements. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the shortcoming of insufficient heat dissipation of high-power optical modules in the prior art, and to propose a water-cooling heat dissipation device for high-power optical modules. The water-cooling heat dissipation device for high-power optical modules has good heat dissipation effect and can effectively solve the heat dissipation problem of the downstream optical module.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] Design a water-cooling heat dissipation device for high-power optical modules, including a water-cooling module. The water-cooling module is arranged on the optical cage of the PCB board. Its characteristics are that the water-cooling module is composed of a water-cooling box and a plurality of water-cooling pipes connected to the water-cooling box; an independent water inlet tank and a water outlet tank are arranged in the water-cooling box. Water inlet ends and water outlet ends communicated with the water inlet tank and the water outlet tank are respectively arranged at both ends of the water-cooling box. A plurality of water inlets are arranged on the water inlet tank, and a plurality of water outlets are arranged on the water outlet tank; strip-shaped openings are arranged at each channel position of the optical cage, and an optical module water-cooling plate is fixed on the openings. The water-cooling pipes are fixed on the optical module water-cooling plate along the length direction. One end of the water-cooling pipe is connected to the water inlet, and the other end is connected to the water outlet.

[0007] Further, it also includes a shrapnel fastener which fixes the water-cooling pipe on the optical cage. The shrapnel fastener is provided with fixing points on both sides of the water-cooling pipe and is fixed on the optical cage in a snap-fastening manner.

[0008] Further, the water-cooling pipe is a copper pipe.

[0009] Further, the top of the optical module water-cooling plate is provided with upward protruding upper bosses. The upper bosses are distributed on both sides and in the middle of the top of the optical module water-cooling plate and enclose a card slot, and the water-cooling pipe is clamped in the card slot.

[0010] Further, the bottom of the optical module water-cooling plate is provided with downward protruding lower bosses. The lower bosses are clamped on the opening and are in contact with the optical module.

[0011] A high-power optical module water-cooling and heat-dissipating device proposed by the present utility model has the following beneficial effects: The present utility model can effectively solve the heat-dissipation problem of high-power optical modules, improve the heat-dissipation efficiency of the water-cooling module, and ensure the working performance of high-power optical modules. Specifically:

[0012] (1) The heat conduction path of the present utility model is short and the heat-dissipation effect is good.

[0013] (2) The water-cooling module flow channels of the optical module of the present utility model are in parallel, which can well solve the heat-dissipation problem of the downstream optical module.

[0014] (3) The present utility model has strong environmental adaptability and can be flexibly adjusted according to the internal layout of the device.

[0015] (4) The present utility model has low noise and does not require a fan to separately dissipate heat from the optical module.

[0016] (5) The structure of the present utility model is simple and easy to implement. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the existing heat-dissipation structure by increasing the size of the radiator;

[0019] Figure 2 is a schematic structural diagram of the existing heat conduction by heat pipe plus water-cooling heat dissipation;

[0020] Figure 3 is a three-dimensional structural diagram of the present utility model;

[0021] Figure 4 is an exploded structural diagram of the present utility model;

[0022] Figure 5 It is a side view of the assembly of the optical module water-cooling plate and the water-cooling pipe in the present utility model;

[0023] Figure 6 It is a schematic diagram of the internal structure of the water-cooling box in the present utility model;

[0024] The markings in the figure are: 1, optical cage; 11, opening; 2, water-cooling box; 21, water inlet end; 22, water outlet end; 23, water inlet groove; 24, water outlet groove; 25, water inlet; 26, water outlet; 3, optical module water-cooling plate; 31, upper convex platform; 32, lower convex platform; 4, water-cooling pipe; 5, elastic piece fastener. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] Now, in combination with the accompanying drawings of the specification, the structural features of the present utility model will be described in detail.

[0029] See Figures 3 - 6, A high-power optical module water-cooled heat dissipation device, including a water-cooling module. The water-cooling module is arranged on the optical cage 1 of the PCB board. The optical cage 1 is a 1X4 optical cage, which can plug in 4 optical modules at the same time. It is crimped on the PCB board. The water-cooling module is composed of a water-cooling box 2 and a plurality of water-cooling pipes 4 connected to the water-cooling box 2. In order to ensure the heat conduction ability of the water-cooling pipe 4, the water-cooling pipe 4 is made of a φ4mm copper pipe. An independent water inlet groove 23 and a water outlet groove 24 are arranged in the water-cooling box 2. The two ends of the water-cooling box 2 are respectively provided with a water inlet end 21 and a water outlet end 22 communicated with the water inlet groove 23 and the water outlet groove 24. A plurality of water inlets 25 are arranged on the water inlet groove 23, and a plurality of water outlets 26 are arranged on the water outlet groove 24.

[0030] The optical cage 1 is provided with strip-shaped openings 11 at each channel position. An optical module water-cooling plate 3 is fixed on the opening 11. The optical module water-cooling plate 3 is fixed on the PCB board by screws. The optical module water-cooling plate 3 is made of an aluminum block. The water-cooling pipe 4 is fixed on the optical module water-cooling plate 3 along the length direction and is connected by welding. One end of the water-cooling pipe 4 is connected to the water inlet 25, and the other end is connected to the water outlet 26. The two ends of the water-cooling pipe 4 are connected to the internal water circuit of the water-cooling box 2. The top of the optical module water-cooling plate 3 is provided with upward protrusions 31. The upward protrusions 31 are distributed on both sides and the middle of the top of the optical module water-cooling plate 3 and enclose a card slot. The water-cooling pipe 4 is clamped in the card slot. The setting of the upward protrusions 31 can increase the contact area between the optical module water-cooling plate 3 and the water-cooling pipe 4, which is beneficial to heat conduction. The bottom of the optical module water-cooling plate 3 is provided with downward protrusions 32. The downward protrusions 32 are clamped on the opening 11 and are in contact with the optical module. Heat is introduced into the water-cooling pipe 4 through the downward protrusions 32, and then the heat is carried away by the water flow in the water-cooling pipe 4. The flow channel design in the optical module water-cooling plate 3 makes the flow channels of each optical module water-cooling module in parallel, ensuring that cold water flows into each water-cooling pipe 4, achieving a better heat dissipation effect.

[0031] It also includes a spring clip fastener 5. The spring clip fastener 5 fixes the water-cooling pipe 4 on the optical cage 1. The spring clip fastener 5 is provided with fixing points on both sides of the water-cooling pipe 4 and is fixed on the optical cage 1 by a snap-fastening method. The spring clip fastener 5 has a certain elasticity, which can ensure that after the optical module is inserted into the optical cage 1, it can be in close contact with the downward protrusion 32 of the optical module water-cooling plate 3.

[0032] The high-power optical module water-cooled heat dissipation device of the present utility model can effectively solve the heat dissipation problem of high-power optical modules, improve the heat dissipation efficiency of the water-cooling module, and ensure the working performance of high-power optical modules. Specifically: The water inlet end 21 and the water outlet end 22 of the water-cooling box 2 are respectively connected to water pipes and are connected to the water circuit of the system. When working, water will flow into the water-cooling box 2, and then flow through the water-cooling pipes 4 of each optical module water-cooling plate 3 through the internal flow channel of the water-cooling box 2, and heat is exchanged with the optical module through the optical module water-cooling plate 3 to carry away the heat.

[0033] During use, after the 800G optical module is inserted into the optical cage 1, the optical module contacts the lower boss 32 of the optical module water-cooling plate 3, and the elastic piece fastener 5 will ensure the close contact between the optical module and the lower boss 32 due to its elasticity. When the system is working, the optical module will generate 21W of heat, and the heat will first be conducted to the water-cooling pipe 4 through the lower boss 32 of the optical module water-cooling plate 3; due to the waterway connection between the water-cooling module and the system, the cold water flow enters the water-cooling box 2 through the water inlet end 21, and then flows through the water-cooling pipes 4 of each optical module water-cooling plate 3 through the water inlet groove 23 and the water outlet groove 24 in the internal flow path of the water-cooling box 2; the heat conducted to the water-cooling pipe 4 through the lower boss 32 of the optical module water-cooling plate 3 will exchange heat with the internal water flow, and the heat will be taken away by the water flow; finally, the hot water flow flows out of the water-cooling module through the water outlet end 22, and finally the effective heat dissipation of the 800G optical module is realized.

[0034] The following describes the specific implementation of the effective heat dissipation of the optical module by this water-cooling heat dissipation mechanism through heat dissipation calculation and analysis:

[0035] We assume a conventional application scenario: an 800G optical module is inserted into the optical cage 1, the system is powered on and running normally, the actual power consumption Q of the optical module is 21W, and the water-cooling system is running normally; the temperature specification of the optical module Tc ≤ 70°C, and the water inlet temperature of the water-cooling box 2 is Tin = 45°C.

[0036] Next, the temperature difference between the water-cooling box 2 and the optical module will be calculated to verify whether the surface temperature of the optical module can meet the specification requirements.

[0037] 1. The temperature difference between the optical module and the lower boss 32: △T1 = Q * R1 = 21 x 0.71 = 14.9°C. Here, R1 is the thermal resistance between the optical module and the lower boss 32. According to its contact area and contact situation, R1 = 0.71°C / W is calculated; Q is the heat flux through the contact surface, and the power consumption of the optical module 21W is taken.

[0038] 2. The temperature difference △T2 between the optical module water-cooling plate 3 and the water-cooling pipe 4 = Q * R2 = 21 x 0.1 = 2.1°C

[0039] Here, R2 is the thermal resistance between the optical module water-cooling plate 3 and the water-cooling pipe 4. According to its contact area and contact situation, R1 = 0.1°C / W is calculated; Q is the heat flux through the contact surface, and the power consumption of the optical module 21W is taken.

[0040] 3. The surface temperature of the optical module Tc = Tin + △T1 + △T2 = 45 + 14.9 + 2.1 = 62°C.

[0041] Through thermal calculation, it is deduced that the surface temperature of the optical module Tc = 62°C, which is less than its specification temperature of 70°C, meeting the heat dissipation requirements.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A water-cooling heat dissipation device for a high-power optical module, comprising a water-cooling module, wherein the water-cooling module is arranged on an optical cage (1) of a PCB board, and is characterized in that: The water cooling module is composed of a water cooling box (2) and a plurality of water cooling pipes (4) connected to the water cooling box (2); The water cooling box (2) is provided with an independent water inlet trough (23) and a water outlet trough (24); two ends of the water cooling box (2) are respectively provided with a water inlet end (21) and a water outlet end (22) which are connected to the water inlet trough (23) and the water outlet trough (24); the water inlet trough (23) is provided with a plurality of water inlets (25); and the water outlet trough (24) is provided with a plurality of water outlets (26); The light cage (1) is provided with a long strip opening (11) at each channel position, a light module water cooling plate (3) is fixed on the opening (11), the water cooling pipe (4) is fixed on the light module water cooling plate (3) along the length direction, one end of the water cooling pipe (4) is connected to the water inlet (25), and the other end is connected to the water outlet (26).

2. A water-cooling device for a high-power optical module according to claim 1, characterized in that: It also includes a spring clip fastener (5), which fixes the water cooling pipe (4) on the light cage (1). The spring clip fastener (5) is provided with fixing points on both sides of the water cooling pipe (4) and is fixed to the light cage (1) in a snap-fit ​​manner.

3. A water-cooling device for a high-power optical module according to claim 1, characterized in that: The water cooling tube (4) is a copper tube.

4. A water-cooling device for a high-power optical module according to claim 1, characterized in that: An upper boss (31) protruding upward is provided on the top of the optical module water cooling plate (3); the upper boss (31) is distributed on both sides and the middle of the top of the optical module water cooling plate (3) and forms a slot, and the water cooling pipe (4) is mounted in the slot.

5. The water-cooling device for high-power optical module according to claim 1, characterized in that: A lower boss (32) protruding downward is provided at the bottom of the optical module water cooling plate (3); the lower boss (32) is snap-fitted onto the opening (11) and in contact with the optical module.

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