Aluminum liquid cooling plate with anti-corrosion inner flow channel

Abstract

The utility model belongs to the field of mechanical engineering technology, and particularly relates to an aluminum liquid cooling plate with internal flow channel corrosion protection. It includes a liquid cooling plate substrate, a fluid connector, a flow channel cavity and an anti-corrosion layer; the liquid cooling plate substrate includes a cover plate and a bottom plate, the fluid connector is arranged on the side of the bottom plate, the flow channel cavity is processed on the bottom plate, and the liquid inlet and outlet of the flow channel cavity correspond to the arranged fluid connector; the cover plate is processed with a flow channel shape corresponding to the bottom plate; the flow channel cavity is a serpentine flow channel structure, the anti-corrosion layer is attached to its inner wall, and a branch channel is processed at the key heat dissipation position; the anti-corrosion layer is deposited to a certain thickness to the flow channel position of the liquid cooling plate substrate by means of local chemical plating. The liquid cooling plate described in the present application can achieve good internal flow channel corrosion protection effect, with mature manufacturing process, easy operation and stable product performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical engineering, and particularly relates to an aluminum liquid cooling plate with an inner flow channel having corrosion resistance. Background Art

[0002] With the rapid development of electronic technology, the heat generated by electronic equipment is getting higher and higher. The increasing heat generation will not only affect the usability and reliability of chips or modules, but also shorten the service life. There are two main heat dissipation methods for existing electronic equipment: air cooling and liquid cooling. However, traditional air cooling can no longer meet the heat dissipation needs. Compared with traditional air cooling, liquid cooling has higher heat dissipation efficiency and does not require high component positions, but the design is more complex, the cost is high, and the sealing requirements are high. However, for complex working conditions, only liquid cooling can achieve better heat dissipation effects.

[0003] In the process of liquid cooling, the focus is on the design of the liquid cooling plate. In the past, the liquid cooling plate was made of aluminum plate and then the flow channel was directly welded to weld the cold plate and the cover plate into a whole. This resulted in the cooling water directly contacting the aluminum flow channel when the liquid cooling plate was used. Long-term use can easily lead to corrosion inside the flow channel, especially when the cooling water quality is poor, which is more likely to cause corrosion and reduce the service life of the liquid cooling plate. Utility Model Content

[0004] The utility model aims to provide an aluminum liquid cooling plate with an inner flow channel that is corrosion-resistant.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a liquid cooling plate substrate, a fluid connector, a flow channel cavity and an anti-corrosion layer;

[0006] The liquid cooling plate substrate comprises a cover plate and a bottom plate, the fluid connector is arranged on the side of the bottom plate, the flow channel cavity is processed on the bottom plate, the liquid inlet and the liquid outlet of the flow channel cavity correspond to the arranged fluid connector; the cover plate is processed with a flow channel shape corresponding to the bottom plate;

[0007] The flow channel cavity is a serpentine flow channel structure, the anti-corrosion layer is attached to the inner wall thereof, and a branch flow channel is processed at a key heat dissipation position.

[0008] Furthermore, the vertical cross-section of the serpentine flow channel is rectangular.

[0009] Furthermore, the edges of the fins of the flow divider are processed with rounded corners.

[0010] Furthermore, the anti-corrosion layer is locally chemically plated, and the plated layer is deposited to a certain thickness at the flow channel position of the liquid cooling plate substrate.

[0011] Furthermore, the local chemical plating layer of the anti-corrosion layer is nickel.

[0012] Furthermore, the thickness of the local chemical plating layer is 25-40 μm.

[0013] Furthermore, the liquid cooling plate substrate is formed by welding a cover plate and a bottom plate through friction stir welding after partial nickel plating.

[0014] Furthermore, the material selected for the cover plate and the base plate is 3A21 aluminum alloy or 6063 aluminum alloy.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) the present invention adopts the method of chemical nickel plating on the inner wall of the flow channel for corrosion protection, the chemical nickel plating layer has high stability, does not affect the thermal conductivity of the liquid cooling plate, and has strong corrosion protection ability for the liquid cooling plate; (2) the present invention adopts stir friction welding to weld the cover plate and the bottom plate, the welding process is stable and the sealing is good.

[0016] In order to more clearly illustrate the functional characteristics and structural parameters of the utility model, further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 The utility model is a schematic diagram of the structure of an aluminum liquid cooling plate with an anti-corrosion inner flow channel.

[0019] Figure 2 It is a schematic cross-sectional diagram of a flow channel cavity of an aluminum liquid cooling plate with an anti-corrosion inner flow channel according to the utility model.

[0020] The reference numerals in the figure are: 1-cover plate; 2-bottom plate; 3-fluid connector; 4-flow channel cavity; 5-anti-corrosion layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] Combination Figure 1The present invention provides an aluminum liquid cooling plate with an inner flow channel having corrosion resistance, the liquid cooling plate comprising a liquid cooling plate substrate, a fluid connector (3), a flow channel cavity (4) and an anti-corrosion layer (5), the liquid cooling plate substrate comprising a cover plate (1) and a bottom plate (2), the fluid connector (3) being arranged on the side of the bottom plate (2), the flow channel cavity (4) being processed on the bottom plate (2), the liquid inlet and the liquid outlet of the flow channel cavity (4) corresponding to the arranged fluid connector (3); the cover plate is processed to form a flow channel shape corresponding to the bottom plate; the flow channel cavity (4) is a serpentine flow channel structure, the anti-corrosion layer (5) is attached to the inner wall thereof, and a flow channel is processed at a key heat dissipation position.

[0023] Furthermore, the vertical cross-section of the serpentine flow channel is rectangular.

[0024] Furthermore, the edges of the fins of the flow divider are processed with rounded corners.

[0025] Furthermore, the anti-corrosion layer (5) is locally chemically plated, and the plated layer is deposited to a certain thickness at the flow channel position of the liquid cooling plate substrate.

[0026] Combination Figure 2 The cover plate (1) and the bottom plate (2) are chemically nickel plated at the flow channel positions by a local chemical nickel plating method, and the thickness of the nickel plating layer is 25 to 40 μm; the cover plate (1) and the bottom plate (2) are welded into one body by a stir friction welding method.

[0027] Furthermore, the material selected for the cover plate (1) and the bottom plate (2) is 3A21 aluminum alloy or 6063 aluminum alloy. The specific structural features are processed according to the requirements of the design drawing processing department.

[0028] The processing of this embodiment includes the following steps:

[0029] Step 1: Processing a serpentine flow channel cavity and a corresponding flow channel cavity step surface on the bottom plate. The vertical cross-section of the flow channel cavity is preferably rectangular, with a processing depth of 7 mm and a width of 12 mm. A branch flow channel is processed at a key heat dissipation position to increase the heat dissipation area. The fin edges of the branch flow channel are processed with rounded corners to reduce liquid flow resistance.

[0030] Step 2, processing a cover plate according to the shape of the flow channel cavity, wherein the thickness of the cover plate is consistent with the size of the step surface of the flow channel cavity, preferably 5 mm;

[0031] Step 3, chemically nickel-plating the flow channel position of the bottom plate, performing protection treatment on the remaining positions except the flow channel position, chemically nickel-plating the entire cover plate, the thickness of the chemical nickel plating layer is 25 to 40 μm, and removing the protection after the nickel plating is completed;

[0032] Step 4, using stir friction welding to weld the cover plate and the bottom plate into a whole, with a weld depth of >5mm;

[0033] Step 5: According to the design drawings, remove the process allowance of 2mm from the friction stir welding surface, process the corresponding boss and other structural features on the reverse side, and perform subsequent surface treatment according to the processing requirements;

[0034] Step 6: Install the fluid connector corresponding to the flow channel cavity.

[0035] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aluminum liquid cooling plate with an anti-corrosion inner channel, characterized in that: It includes a liquid cooling plate substrate, a fluid connector, a flow channel cavity and an anti-corrosion layer; The liquid cooling plate substrate comprises a cover plate and a bottom plate, the fluid connector is arranged on the side of the bottom plate, the flow channel cavity is processed on the bottom plate, the liquid inlet and the liquid outlet of the flow channel cavity correspond to the arranged fluid connector; the cover plate is processed with a flow channel shape corresponding to the bottom plate; The flow channel cavity is a serpentine flow channel structure, the anti-corrosion layer is attached to the inner wall thereof, and a branch flow channel is processed at a key heat dissipation position.

2. The aluminum liquid cooling plate with inner flow channel corrosion resistance according to claim 1, characterized in that: The vertical cross section of the serpentine flow channel is a rectangle.

3. The aluminum liquid cooling plate with anti-corrosion inner flow channel according to claim 1, characterized in that: The fin edges of the flow divider are processed with rounded corners.

4. The aluminum liquid cooling plate with anti-corrosion inner flow channel according to claim 1, characterized in that: The anti-corrosion layer is locally chemically plated, and the plated layer is deposited to a certain thickness at the flow channel position of the liquid cooling plate substrate.

5. The aluminum liquid cooling plate with anti-corrosion inner flow channel according to claim 4, characterized in that: The local chemical plating layer of the anti-corrosion layer is nickel.

6. The aluminum liquid cooling plate with inner flow channel corrosion resistance according to claim 5, characterized in that: The thickness of the local chemical plating layer is 25-40 μm.

7. The aluminum liquid cooling plate with anti-corrosion inner flow channel according to claim 6, characterized in that: The liquid cooling plate substrate is formed by welding a cover plate and a bottom plate through friction stir welding after partial nickel plating.

8. The aluminum liquid cooling plate with anti-corrosion inner flow channel according to claim 1, characterized in that: The material used for the cover plate and the bottom plate is 3A21 aluminum alloy or 6063 aluminum alloy.

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