Novel cold plate with honeycomb micro pin-fin channels

Abstract

The utility model belongs to the technical field of heat exchange, and particularly relates to a honeycomb micro pin-fin channel novel cold plate, the interior of the novel cold plate is hollow to form an internal flow channel, the two sides of the internal flow channel are provided with a flow channel inlet and a flow channel outlet through which a working medium enters and exits respectively, a plurality of rib columns are distributed in the internal flow channel in an array mode, and micro channels through which the working medium circulates are formed between the adjacent rib columns. The rib columns are hexagonal prisms, three adjacent hexagonal prism triangular arrays form a micro-channel unit, the micro-channel unit is provided with a Y-shaped channel, bionics design is adopted, the bee honeycomb-like micro-channel unit is adopted, flow distribution is more reasonable by building honeycomb-like hexagonal ribs, then the flowing mode of working media is changed, periodic separation and convergence are achieved, and the working media are distributed more reasonably. And a flowing boundary layer is continuously broken, so that the temperature uniformity and the heat exchange efficiency of a heating surface are improved and enhanced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat exchange, and particularly relates to a new honeycomb micro-needle rib channel cold plate. BACKGROUND

[0002] With the improvement of the integration of electronic equipment and the updating of products, high heat flux devices are increasing day by day, and the heat flux density in a limited space with a large number of components is exponentially increasing. The micro-channel liquid cooling cold plate has the advantages of small size, higher heat dissipation performance, light weight and the like, and is the current mainstream heat dissipation mode for solving the problem of high-density heat flow.

[0003] As an innovative form of micro-channels, the micro-needle rib channel has been proved to achieve good results in the thermal control of equipment, especially high heat flux equipment. Research has found that the heat exchange capacity of the micro-needle rib structure is significantly higher than that of ordinary parallel micro-channels. This is mainly because the protruding needle ribs can increase the heat exchange area in a large range, and when the fluid flows through the regularly dispersed needle ribs, periodic separation and convergence behaviors are formed. The flow boundary layer is constantly broken, and the fluid is always in the underdeveloped stage, having strong heat exchange effect.

[0004] However, the micro-needle rib array with a traditional cross-sectional shape and layout cannot well guide the fluid into the back area thereof, resulting in large flow resistance. Therefore, a new needle rib configuration based on the bionic principle has attracted more and more attention in order to improve the overall thermal hydraulic characteristics of the micro-needle rib array channel. SUMMARY

[0005] In order to solve the above problems, the application provides a new honeycomb micro-needle rib channel cold plate, which comprises:

[0006] The internal flow channel is formed in the new cold plate, and the internal flow channel has a flow channel inlet and a flow channel outlet on both sides for the working medium to enter and exit. A plurality of rib columns are arranged in the internal flow channel, and a micro-channel for the working medium to flow is formed between adjacent rib columns.

[0007] Preferably, the new cold plate comprises a cold plate base body and a cover plate covering the cold plate base body.

[0008] The cold plate base body has a water tank, and the water tank and the cover plate form the internal flow channel.

[0009] Preferably, one end surface of the rib column is in contact with the tank bottom of the water tank, and the other end surface is in contact with the inner surface of the cover plate.

[0010] Preferably, the rib column is a hexagonal prism.

[0011] Preferably, three adjacent hexagonal prisms form a triangular array to form a micro-channel unit, and the micro-channel unit has a Y-shaped channel.

[0012] Preferably, the Y-shaped channel comprises three branches with an included angle of 60 degrees, and the width of each branch is equal.

[0013] Preferably, one end surface of the rib column has a parallel gap with the surface of the water tank, and the other end surface is in contact with the inner surface of the cover plate.

[0014] Preferably, the flow channel inlet and the flow channel outlet are located on the cover plate.

[0015] Preferably, the internal flow channel has a retention space without rib columns at the positions of the flow channel inlet and the flow channel outlet, and the retention space is distributed symmetrically along the center of the internal flow channel.

[0016] The advantages of the present application include:

[0017] 1. The honeycomb micro-needle rib channel novel cold plate provided by the utility model adopts bionics design, imitates the honeycomb micro-channel unit of bees, makes the flow distribution more reasonable through the construction of the honeycomb hexagonal rib, and changes the flow mode of the working medium, periodically separates and converges, and the flow boundary layer is continuously broken, so that the uniformity of the heating surface and the heat exchange efficiency are improved and strengthened.

[0018] 2. The honeycomb micro-needle rib channel novel cold plate provided by the utility model has a certain flexibility according to the distribution change of the thermal load, and the array arrangement of the micro-channel unit can be correspondingly optimized and adjusted in density, and the number of units is appropriately set.

[0019] 3. The honeycomb micro-needle rib channel novel cold plate provided by the utility model can correspondingly optimize and adjust the included angle between the honeycomb micro-needle rib inside the micro-channel unit and the bottom of the water tank according to the flow change of the working medium, and the positional relationship and row distance between the honeycomb micro-needle ribs can also be appropriately adjusted to meet the requirements of the real environment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the honeycomb micro-needle rib channel novel cold plate of the utility model;

[0021] Figure 2 is a structural schematic view of the cold plate base body of the utility model;

[0022] Figure 3 is a structural schematic view of the cover plate of the utility model. DETAILED DESCRIPTION

[0023] In order to make the technical solutions of the present application and its advantages clearer, the technical solutions of the present application will be further clearly and completely described below in conjunction with the drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present application, and are only used to explain the present application, but not to limit the present application. It should be noted that, for the purpose of description, only parts related to the present application are shown in the drawings, and other related parts can be referred to the general design. In the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined to obtain new embodiments.

[0024] Please refer to Figures 1-3 The utility model provides technical scheme; A honeycomb microneedle rib channel novel cold plate includes: Cold plate base body 1, the outside of cold plate base body 1 is equipped with bolt hole 11, and the inside is equipped with internal flow channel, and the internal flow channel includes water tank 12 and at least one microchannel unit 13, and the working medium enters water tank 12 from flow channel entrance 22, and after passing through microchannel unit 13, flows out from flow channel exit 23;Microchannel unit 13 is formed by adjacent three hexagonal prism triangular arrays, and microchannel unit 13 has Y-shaped channel, and the three hexagonal prisms are as Figure 2 The left upper honeycomb microneedle rib 131, the right honeycomb microneedle rib 132 and the left lower honeycomb microneedle rib 133.

[0025] The cover plate 2 is fixed on the upper side of the cold plate base body 1, and the cold plate bolt hole 11 and the cover plate bolt hole 21 are connected by bolts, which is used to close the cold plate, and is provided with flow channel entrance 22 and flow channel exit 23 for the working medium to enter and leave the internal flow channel;The flow channel entrance 22 is connected with the input pipe 3 for the input of the working medium, and the flow channel exit 23 is connected with the output pipe 4 for the output of the working medium;The space left on both sides of the water tank 12 is arranged in a central symmetric manner, which is used for the working medium to enter the inside of the water tank from the flow channel entrance 22 and flow out from the flow channel exit 23.

[0026] The microchannel unit 13 is arranged in the middle region of the water tank 12. The row where the left upper honeycomb microneedle rib 131 is located and the row where the right honeycomb microneedle rib 132 is located are arranged in a forked manner, and the column where the left upper honeycomb microneedle rib 131 is located and the column where the left lower honeycomb microneedle rib 133 are arranged in a straight manner. The bottom edge line of the left upper honeycomb microneedle rib 131, the right honeycomb microneedle rib 132 and the left lower honeycomb microneedle rib 133 is parallel to the bottom edge line of the water tank 12 to improve the utilization area and ensure the heat exchange efficiency.

[0027] The working principle of the honeycomb microneedle rib channel novel cold plate of the utility model is as follows:

[0028] As Figure 1As shown, the input pipe 3 and the output pipe 4 are arranged on the cover plate 2 and connected to the flow channel inlet 22 and the flow channel outlet 23 respectively, the heat dissipation device is arranged on the back of the cold plate base body 1 and directly contacts with the cold plate base body 1, so that the heat is transmitted to the working medium through the cold plate base body 1; the working medium firstly flows into the input pipe 3, enters the water tank 12 through the flow channel inlet 22, then flows through the micro-channel unit 13, absorbs the heat in the cold plate base body 1, then enters the output pipe 4 through the flow channel outlet 23, and finally is discharged.

[0029] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A novel cold plate with honeycomb microneedle rib channels, characterized by, The new cold plate includes: The internal flow channel is formed in the hollow interior of the new cold plate, and the internal flow channel has a working fluid inlet (22) and a working fluid outlet (23) on both sides, respectively; a plurality of rib columns are arranged in the internal flow channel, and a micro channel for the working fluid to flow through is formed between adjacent rib columns.

2. The honeycomb microneedle rib channel novel cold plate of claim 1, wherein, The new cold plate includes a cold plate base (1) and a cover plate (2) covering the cold plate base (1). The cold plate base (1) has a water groove (12), and the water groove (12) and the cover plate (2) form the internal flow channel.

3. The honeycomb microneedle rib channel novel cold plate of claim 2, wherein, One end surface of the rib column is in contact with the groove bottom of the water groove (12), and the other end surface is in contact with the inner surface of the cover plate (2).

4. The honeycomb microneedle rib channel novel cold plate of claim 1, wherein, The rib column is a hexagonal column.

5. The honeycomb microneedle rib channel novel cold plate of claim 4, wherein, Three adjacent hexagonal columns form a micro channel unit (13), and the micro channel unit (13) has a Y-shaped channel.

6. The honeycomb microneedle rib channel novel cold plate of claim 4, wherein, The Y-shaped channel includes three branches with an included angle of 60 degrees, and the width of each branch is equal.

7. The honeycomb microneedle rib channel novel cold plate of claim 2, wherein, One end surface of the rib column has a parallel gap with the surface of the water groove (12), and the other end surface is in contact with the inner surface of the cover plate (2).

8. The honeycomb microneedle rib channel novel cold plate of claim 2, wherein, The working fluid inlet (22) and the working fluid outlet (23) are located on the cover plate (2).

9. The honeycomb microneedle rib channel novel cold plate of claim 2, wherein, The internal flow channel has a reserved space without rib columns at the positions of the working fluid inlet (22) and the working fluid outlet (23), and the reserved space is symmetrically distributed along the center of the internal flow channel.

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