Heat sink with high cleanability inner surface

Abstract

The utility model relates to a heat sink with high cleanliness inner surface, which solves the technical problem of complex inner surface structure and high cleaning difficulty of the existing heat sink, and is provided with upper liquid outlet collecting pipes and lower liquid inlet collecting pipes arranged in parallel, half-round branch pipes are arranged symmetrically and spaced apart along the length direction between the upper liquid outlet collecting pipes and the lower liquid inlet collecting pipes, the upper liquid outlet collecting pipes and the lower liquid inlet collecting pipes are surrounded by the branch pipes on both sides to form a cylinder, the branch pipes are provided with fin plates on one side close to the center of the cylinder, each fin plate is integrally coiled into a half-round plate. The utility model can be widely applied to the heat sink that needs to be cleaned.

Description

Technical Field

[0001] This utility model relates to space environment simulation equipment, and in particular to a heat sink with a highly clean inner surface. Background Technology

[0002] Conducting thorough space environment simulation tests on the ground, and fully exposing various potential defects in spacecraft products before launch, is of great significance for improving the reliability of spacecraft. Heat sinks are an important component of space environment simulation equipment; their function is to simulate the cold, dark environment of space on the ground, playing a crucial role in verifying the thermal design and thermal performance of spacecraft.

[0003] Currently, most heat sinks in domestic space environment simulation equipment are tube-fin type heat sinks. Furthermore, to shorten processing cycles and save costs, they are often designed with the heat sink branch pipes facing into the vacuum chamber and the heat sink fins facing the vacuum chamber wall (e.g., Figure 1 As shown in the figure, after long-term use of space environment simulation equipment, the inner surface of the heat sink is difficult to clean due to its complex structure, resulting in high maintenance costs and long maintenance cycles. Summary of the Invention

[0004] In order to solve the technical problem of complex inner surface structure and difficult cleaning of existing heat sinks, this utility model provides a heat sink with a highly cleanable inner surface.

[0005] This utility model provides a heat sink with a highly clean inner surface, which is provided with an upper liquid outlet collection pipe and a lower liquid inlet collection pipe arranged in parallel with each other. The upper liquid outlet collection pipe and the lower liquid inlet collection pipe are connected by semi-circular branch pipes arranged symmetrically at intervals along the length direction. The branch pipes on both sides of the upper liquid outlet collection pipe and the lower liquid inlet collection pipe form a cylinder. A finned plate is provided on the side of the branch pipe near the center of the cylinder. The finned plate has two pieces, and each finned plate is rolled into a semi-circular plate.

[0006] Preferably, the branch pipes are of the same length and the pipe resistance within each branch pipe is the same.

[0007] Preferably, the branch pipe and the finned plate are welded together as a whole.

[0008] Preferably, the front end of the lower liquid inlet manifold is connected to the liquid nitrogen storage tank via a pipeline and an inlet assembly.

[0009] Preferably, an inlet bellows is provided between the lower liquid inlet manifold and the liquid nitrogen storage tank, and an outlet bellows and an outlet assembly are provided at the rear end of the upper liquid outlet manifold.

[0010] Preferably, a roller assembly is installed at the bottom of the heat sink, the roller assembly is in close contact with the heat sink guide rail, the top of the heat sink guide rail has three guide rail surfaces arranged in an inverted triangular shape, the roller assembly has two pairs of rollers, each pair of rollers is connected by a U-shaped semi-circular groove; each roller has three sets of guide wheels, the three sets of guide wheels are in contact with the three guide rail surfaces of the heat sink guide rail respectively, and a spring is provided inside the roller, the spring pressing the guide wheel against the guide rail surface.

[0011] Preferably, a PTFE heat insulation plate is provided between the heat sink and the roller assembly.

[0012] Preferably, an anti-radiation screen is installed on the outside of the heat sink.

[0013] Preferably, the surfaces of the upper liquid outlet manifold, lower liquid inlet manifold, branch pipe, and finned plate are sprayed with black paint.

[0014] The beneficial effects of this utility model are:

[0015] This invention optimizes and improves the original heat sink wall form of "branch pipe facing inward and fins facing outward" to form a structure of "branch pipe facing outward and fins facing inward". This not only increases the effective test space inside the heat sink and reduces the difficulty of cleaning, but also greatly improves the aesthetics of the inner surface of the heat sink.

[0016] This utility model also includes a roller assembly to prevent the trolley from tipping over, and the roller assembly is stably fixed on the heat sink guide rail by a spring. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a traditional heat sink.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model.

[0019] Explanation of symbols in the attached drawings:

[0020] 1. Upper liquid outlet manifold; 2. Branch pipe; 3. Finned plate; 4. Outlet bellows; 5. Lower liquid inlet manifold; 6. Liquid nitrogen storage tank; 7. Inlet bellows; 8. Outlet flange assembly; 9. Roller assembly; 10. Heat sink guide rail; 11. Inlet flange assembly. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, so that those skilled in the art to which the present invention pertains can easily implement the present invention.

[0022] Example: Figure 2As shown, the main body of this utility model comprises an upper liquid outlet manifold 1 and a lower liquid inlet manifold 5 arranged parallel to each other. Multiple branch pipes 2 connect the upper liquid outlet manifold 1 and the lower liquid inlet manifold 5, and the branch pipes 2 are symmetrically arranged at intervals along the length of both sides of the upper liquid outlet manifold 1 and the lower liquid inlet manifold 5, forming a cylinder. Two finned plates 3 are provided on the side of each branch pipe 2 near the center of the cylinder. Each finned plate 3 is a single sheet rolled into a semi-circular plate. After the branch pipe 2 is bent and pressed into a semi-circle, it is welded to the finned plate 3 to form a whole. The two ends of the branch pipe 2 are welded to the upper liquid outlet manifold 1 and the lower liquid inlet manifold 5 respectively. The branch pipes 2 are of the same length and maintain a specific spacing, ensuring that the pipe resistance of each branch pipe is the same and guaranteeing the uniformity of fluid flow between the branch pipes.

[0023] The upper liquid outlet manifold 1 is equipped with an outlet bellows 4 at its rear end, and an outlet assembly 8 at its rear end; the lower liquid inlet manifold 5 is equipped with an inlet bellows 7 at its front end, and the inlet bellows 7 is connected to the liquid nitrogen storage tank 6 through a pipeline and an inlet flange assembly 11 and other structures.

[0024] This utility model features a bottom-mounted roller assembly 9, which moves along the heat sink guide rail 10 into the container. The heat sink guide rail 10 has three guide surfaces arranged in an inverted triangular shape at its top. The roller assembly 9 contacts the heat sink guide rail 10 and has two pairs of rollers. Each pair of rollers is connected by a U-shaped semi-circular groove. The size of the U-shaped semi-circular groove matches the size of the branch pipe 2. The U-shaped semi-circular groove also has a limiting groove for the lower liquid inlet manifold 5, restricting the slide of the heat sink body and supporting the entire heat sink body. Each roller has three sets of guide wheels, which contact the three guide surfaces of the heat sink guide rail. Springs inside the rollers support them and press them tightly against the three guide surfaces of the heat sink guide rail 10, thus stably fixing the roller assembly 9 to the heat sink guide rail 10. A PTFE heat insulation plate is placed between the roller assembly 9 and the heat sink body to reduce heat leakage from the heat sink itself.

[0025] A radiation shield (mirror panel) is installed on the outside of the heat sink body to reduce radiative heat leakage from the outer wall of the heat sink. After the entire heat sink body is welded, it is cleaned and leak-tested, then subjected to three thermal shock tests and leak testing again. Finally, it is painted black to complete the manufacturing process.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the claims of the present invention should be within the protection scope of the present invention.

Claims

1. A heat sink with a highly clean inner surface, comprising an upper liquid outlet manifold and a lower liquid inlet manifold arranged parallel to each other, wherein the upper liquid outlet manifold and the lower liquid inlet manifold are connected by semi-circular branch pipes arranged symmetrically at intervals along the length direction, and the branch pipes on both sides of the upper liquid outlet manifold and the lower liquid inlet manifold form a cylinder, characterized in that, The branch pipe has a finned plate on the side near the center of the cylinder. There are two finned plates, and each finned plate is rolled into a semi-circular plate.

2. The heat sink with a highly clean inner surface according to claim 1, characterized in that, The branch pipes are all the same length, and the pipe resistance in each branch pipe is the same.

3. The heat sink with a highly clean inner surface according to claim 1, characterized in that, The branch pipe is welded to the finned plate to form a whole.

4. The heat sink with a highly clean inner surface according to claim 1, characterized in that, The front end of the lower liquid inlet manifold is connected to the liquid nitrogen storage tank via pipelines and inlet components.

5. The heat sink with a highly clean inner surface according to claim 4, characterized in that, An inlet bellows is provided between the lower liquid inlet manifold and the liquid nitrogen storage tank, and an outlet bellows and an outlet assembly are provided at the rear end of the upper liquid outlet manifold.

6. The heat sink with a highly clean inner surface according to claim 1, characterized in that, The bottom of the heat sink is equipped with a roller assembly, which is in close contact with the heat sink guide rail. The top of the heat sink guide rail has three guide rail surfaces arranged in an inverted triangular shape. The roller assembly has two pairs of rollers, each pair of rollers being connected by a U-shaped semi-circular groove. Each roller has three sets of guide wheels, which respectively contact the three guide rail surfaces of the heat sink guide rail. A spring is installed inside the roller, and the spring presses the guide wheel tightly against the guide rail surface.

7. The heat sink with a highly clean inner surface according to claim 6, characterized in that, A PTFE heat insulation plate is provided between the heat sink and the roller assembly.

8. The heat sink with a highly clean inner surface according to claim 1, characterized in that, The heat sink is externally equipped with a radiation shield.

9. The heat sink with a highly clean inner surface according to claim 1, characterized in that, The surfaces of the upper liquid outlet manifold, lower liquid inlet manifold, branch pipes, and finned plates are sprayed with black paint.

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