Double-layer cooling heat sink for gas-liquid separation

Abstract

The present application belongs to the field of three-dimensional integrated circuit, high-power semiconductor heat dissipation and cooling technology, and is a double-layer cooling heat sink for gas-liquid separation. The double-layer cooling heat sink is composed of a gas-liquid separation cavity (1), a framework (2) and a heat transfer enhancement cavity (3). The present application has the advantages of using a double-layer design, so that the cooling medium is subjected to twice heat exchange inside the heat sink, and the cooling medium works more fully. The flower-shaped rib columns in the gas-liquid separation cavity (1) can improve the nucleation point density and be beneficial to the generation of bubbles. In the heat transfer enhancement cavity (3), the fan blades of the rotating rib columns can help to cause rotational flow, add fluid disturbance and improve the cooling efficiency to realize secondary heat exchange. The designed framework (2) structure connects the liquid separation cavity (1) and the heat transfer enhancement cavity (3), and can simultaneously exchange heat for two chips.

Description

Technical Field

[0001] This invention belongs to the field of three-dimensional integrated circuits and high-power semiconductor heat dissipation and cooling technology, and is a double-layer cooling heat sink for gas-liquid separation. Background Technology

[0002] As technology advances, it becomes increasingly sophisticated. Among these advancements, the development of microelectronics necessitates a continuous increase in the capacity of electronic components. Larger capacity leads to greater heat generation. For electronic devices, increased temperature translates to decreased reliability; when the temperature reaches 70-80°C, reliability decreases by 5% for every 10°C increase.

[0003] Microchannel cooling technology was developed to address this issue. However, the bubbles generated by the alternation of hot and cold temperatures cause uneven fluid distribution within the microchannels, resulting in no internal gas-liquid separation. Gas is only separated at the outlet, leading to poor heat exchange performance. Summary of the Invention

[0004] The purpose of this invention is to design a novel structure that simultaneously improves cooling efficiency, enhances heat exchange, and achieves gas-liquid separation. To achieve this objective, the solution of this invention is as follows:

[0005] A double-layer enhanced heat exchange cooling heat sink comprises a gas-liquid separation chamber (1), a frame (2), and an enhanced heat exchange chamber (3). This invention is a two-inlet and two-outlet device.

[0006] Furthermore, the gas-liquid separation chamber (1) is composed of a gas-liquid separation port (11), a jet hole (12), a flower-shaped rib (13), and a water inlet (14).

[0007] Furthermore, the upper part of the gas-liquid separation chamber (1) is an arc surface, which facilitates the accumulation of gas in the middle; and the fan-shaped distribution of the gas-liquid separation port (11) is to prevent and ensure that all bubbles break before contacting the top, so as to facilitate gas separation.

[0008] Furthermore, the jet hole (12) is connected to the skeleton (2), and the cooling working fluid can enter the enhanced heat exchange chamber (3) from here for secondary heat exchange.

[0009] Furthermore, the flower-shaped ribs (13) are arranged in a 6×8 array from both sides to the middle in the gas-liquid separation chamber (1), with the spacing increasing from sparse to dense, to achieve step-by-step heat exchange; the bottom of the flower-shaped ribs (13) is solid, which facilitates enhanced heat exchange; the top of the flower-shaped ribs (13) is porous, which can increase the nucleation point density and facilitate the generation of bubbles; the arc-shaped exterior of the flower-shaped ribs (13) is conducive to the stability of fluid flow.

[0010] Furthermore, water inlets (14) are distributed on both sides of the gas-liquid separation chamber (1), through which the cooling working fluid enters the device.

[0011] Furthermore, two chips can be placed in the skeleton (2), and the device can perform heat exchange on the two chips simultaneously.

[0012] Furthermore, the enhanced heat exchange chamber (3) is mainly composed of a water outlet (31) and a rotating rib (32).

[0013] Furthermore, the rotating rib (32) consists of a mother column with a diameter of 2d and a fan blade with a diameter of 10d; during operation, the fan blade causes the cooling medium to form turbulence.

[0014] Furthermore, the rotating ribs (32) are arranged in a uniform 6×3 pattern in the enhanced heat exchange cavity (3), with a transverse spacing of 13.5d and a longitudinal spacing of 10d.

[0015] Furthermore, the heat exchange chamber (3) has three water outlet holes (31) on each side; the water outlet holes (31) have a diameter of 4d and are spaced 13.5d apart.

[0016] The advantages of this invention are:

[0017] The double-layer design allows the cooling medium to exchange heat twice inside the heat sink; the flower-shaped ribs (13) in the gas-liquid separation chamber (1) are conducive to the generation of bubbles; the fan blades of the rotating ribs (32) in the enhanced heat exchange chamber (3) help to form turbulence and enhance heat exchange. Attached Figure Description

[0018] Figure 1 Appearance of a double-layer cooling heat sink for gas-liquid separation

[0019] Figure 2 3D schematic diagram of a gas-liquid separation chamber with double-layer cooling heat sink for gas-liquid separation

[0020] Figure 3 Schematic diagram of a double-layer cooling heat sink flower-shaped ribbed structure for gas-liquid separation

[0021] Figure 4 Schematic diagram of a double-layer cooling heat sink framework for gas-liquid separation

[0022] Figure 5 3D schematic diagram of a heat exchange chamber enhanced by a double-layer cooling heat sink for gas-liquid separation

[0023] Figure 6 Schematic diagram of a double-layer cooling heat sink rotating rib structure for gas-liquid separation Detailed Implementation

[0024] The present invention is a two-inlet, two-outlet device, a double-layer cooling heat sink for gas-liquid separation, comprising a gas-liquid separation chamber (1), a frame (2), and an enhanced heat exchange chamber (3); the cooling medium enters from the water inlet holes (14) at both ends of the gas-liquid separation chamber (1), and undergoes preliminary heat exchange in the flower-shaped rib matrix (13), while generating a large number of bubbles. The bubbles leave from the gas-liquid separation port (11), and the cooling medium enters the enhanced heat exchange chamber (3) through the frame (2) from the jet hole (12); in the enhanced heat exchange chamber (3), enhanced heat exchange is carried out through the rotating rib (32), and the cooling medium finally flows out from the water outlet hole (31).

[0025] refer to Figure 2 The gas-liquid separation chamber (1) is made of oxygen-free copper. The jet holes (12) are machined by micro-milling and polished to ensure smooth flow of the cooling medium. The diameter of the jet holes is 5d. The gas-liquid separation port (11) is cut by a cutting tool and does not require polishing. The gas flows out smoothly from the gas-liquid separation port (11). The spacing between the four rows of flower-shaped ribs (13) and the jet holes (12) is 4d, 2.5d, 1.5d, and d, respectively.

[0026] refer to Figure 3 The flower-shaped ribs (13) are made of silicon and are machined. The center of the flower-shaped ribs (13) is a circle with a diameter of 3d, and the petals are 2.5d, totaling 3 parts. The flower-shaped ribs (13) are arranged in a 6×8 array from both sides to the middle of the gas-liquid separation chamber (1), with the spacing increasing from sparse to dense. The bottom of the flower-shaped ribs (13) is thick d and is solid, which is used to enhance heat transfer. The top is 2d high and has holes to increase the nucleation point density. The arc-shaped exterior is beneficial to fluid stability.

[0027] refer to Figure 4 The skeleton (2) is cast from carbon steel and then polished smooth. Two chips can be placed in the skeleton (2), and the heating surfaces are the bottom surface of the gas-liquid separation chamber (1) and the top surface of the enhanced heat exchange chamber (3). There are jet holes in the skeleton (2) that are connected to the jet holes (12) in the gas-liquid separation chamber (1), so that the cooling working fluid can flow into the enhanced heat exchange chamber (3).

[0028] refer to Figure 5 The enhanced heat exchange cavity (3) is 69d long, 41d wide, and 2d thick. The enhanced heat exchange cavity (3) is machined from oxygen-free copper. The outlet holes (31) have a diameter of 4d and are spaced 13.5d apart.

[0029] refer to Figure 6 The rotating rib (32) has a height of 5d, an inner cylinder with a diameter of 2d, an outer fan blade with a diameter of 10d, a fan blade thickness of d, and a span of 60°.

[0030] Matters not covered in this invention are common knowledge.

[0031] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A double-layer cooling heat sink for gas-liquid separation, comprising a gas-liquid separation chamber (1), a frame (2), and an enhanced heat exchange chamber (3), characterized in that: The gas-liquid separation chamber (1) will perform preliminary heat exchange and generate a large number of bubbles, which will leave through the gas-liquid separation port (11); the cooling working fluid will enter the enhanced heat exchange chamber (3) through the jet hole (12) for secondary heat exchange, and then leave through the outlet hole.

2. A double-layer cooling heat sink for gas-liquid separation according to claim 1, characterized in that: The gas-liquid separation chamber (1) is designed with two inlets, with a water inlet (14) on each side. After the cooling medium enters the gas-liquid separation chamber (1), it flows through the flower-shaped rib (13), where it will undergo preliminary heat exchange and generate a large number of bubbles. The gas leaves from the top gas-liquid separation port (11), and there is a jet hole (12) at the bottom, which connects to the frame (2) to introduce the cooling medium into the enhanced heat exchange chamber (3).

3. A double-layer cooling heat sink for gas-liquid separation according to claim 1, characterized in that: The flower-shaped ribs (13) in the gas-liquid separation chamber (1) are arranged in a 6×8 array from both sides to the middle, with the spacing increasing from sparse to dense. The bottom of the flower-shaped ribs (13) is solid to enhance heat transfer, and the top is porous to increase the nucleation point density. The arc-shaped exterior is conducive to fluid stability.

4. A double-layer cooling heat sink for gas-liquid separation according to claim 1, characterized in that: The design of the rotating ribs (32) in the heat exchange chamber (3) will enable the kinetic energy of the cooling medium to be converted into potential energy through the arc surface, and then the kinetic energy will be offset, making the flow of the cooling medium more stable; the rotating ribs (32) are arranged from the middle to the sides from sparse to dense.

5. A double-layer cooling heat sink for gas-liquid separation according to claim 1, characterized in that: The enhanced heat exchange chamber (3) has three water outlet holes (31) on each side. This device is a two-inlet and two-outlet device.

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