Two-phase immersion cooling structure for enhancing natural convection circulation

Abstract

A two-phase immersion cooling structure that enhances natural convection circulation uses a baffle placed above the heat source in the coolant to restrict the flow direction of the coolant. The first side of the baffle forms a first flow channel with the inner wall of the housing, and the corresponding side forms a second flow channel with the inner wall of the housing. The lower surface of the baffle forms an upward sloping surface from the bottom edge of the second side to the bottom edge of the first side. By using the upward sloping shape of the lower surface of the baffle, the flow direction of the coolant containing air bubbles generated by the heat source is effectively restricted to the first flow channel. The first flow channel allows the air bubbles and coolant to flow upward, pass above the baffle, and then return through the second flow channel, forming a natural convection circulation.

Claims

1. A two-phase immersion cooling and heat dissipation structure for enhancing natural convection circulation, comprising: A box containing a coolant that can produce a gas-liquid phase change, and a heat source immersed in the coolant; A condensing device is installed in the upper region of the housing to condense the gaseous coolant inside the housing into droplets; and a baffle is disposed in the coolant above the heat source to restrict the flow direction of the coolant. The first side of the baffle forms a first flow channel with the inner wall of the housing, and the second side of the baffle, corresponding to the first side, forms a second flow channel with the other inner wall of the housing. The upper surface of the baffle forms a transverse flow channel with the gas-liquid interface of the coolant surface. The lower surface of the baffle forms an upward sloping surface from the bottom edge of the second side to the bottom edge of the first side. By having an upward sloping lower surface, the flow direction of the coolant containing bubbles generated by the heat source is effectively restricted to the first flow channel. The first flow channel allows the bubbles and coolant to flow upwards, and the coolant then flows back to the area below the baffle via the transverse and second flow channels, forming a natural convection circulation.

2. The two-phase immersion cooling structure as described in claim 1, wherein, The angle between the lower surface of the stop block and the second side surface is between 30° and 80°.

3. The two-phase immersion cooling structure as described in claim 2, wherein, The cross-section at the junction of the lower surface and the second side surface is one of the following: a sharp corner, a rounded corner, or a chamfer.

4. The two-phase immersion heat dissipation structure as described in claim 1, wherein, The length of the first flow channel is less than the length of the second flow channel.

5. The two-phase immersion heat dissipation structure as described in claim 1, wherein, The distance between the first side and the inner wall of the box is 0.5cm to 10cm.

6. The two-phase immersion heat dissipation structure as described in claim 1, wherein, The distance between the second side and the inner wall of the box is 0.5cm to 10cm.

7. The two-phase immersion heat dissipation structure as described in claim 1, wherein, Furthermore, the upper surface of the block is formed by the top side of the first side to the top side of the second side, which slopes downward from the first side to the second side, and the length of the first flow channel is less than the length of the second flow channel.

8. The two-phase immersion heat dissipation structure as described in claim 7, wherein, The angle between the upper surface and the first side surface is between 70° and 90°.

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