Stacked heat dissipation and supporting structure of expansion machine of mechanical refrigerating machine

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By adopting a stacked heat dissipation structure and a high-thermal resistance connection structure in the mechanical refrigerator expander, the problems of low heat dissipation efficiency, unstable structure and insufficient thermal isolation performance in the space environment are solved, and efficient heat dissipation and stable support performance are achieved.

CN119594651APending Publication Date: 2025-03-11BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH

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Patent Information

Application Number: CN202411831591.7
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-12-12
Publication Date: 2025-03-11

AI Technical Summary

Technical Problem

In the spatial environment, traditional air-cooled and water-cooled heat dissipation methods cannot work effectively, resulting in low heat dissipation efficiency, unstable structure and insufficient thermal isolation performance.

Method used

The stacked heat dissipation and support structure of mechanical refrigerator expander, including heat sinks and heat dissipation plates made of metal materials with high thermal conductivity, form a stacked heat dissipation structure and is fixed by a high thermal resistance connecting structure to ensure structural stability and thermal isolation performance.

Benefits of technology

It realizes efficient heat dissipation, simplifies the spatial radiant cooling structure design, is suitable for the application of compact space loads, and improves the stability and thermal isolation performance of the structure.

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Abstract

The invention discloses a mechanical refrigerator expansion machine laminated heat dissipation and support structure which comprises a laminated heat dissipation structure and a high thermal resistance connecting structure, the laminated heat dissipation structure is composed of two layers of heat dissipation materials, the open loop position is clamped and fixed to the heat source position of the expansion machine, and it is ensured that the heat dissipation materials can be tightly attached and conduct heat in a full contact mode. One end of the high-thermal-resistance connecting structure is fixedly connected with the laminated heat dissipation structure, and the other end is connected with the adjacent supporting structure, so that the overall stability and thermal isolation performance of the structure are ensured. The efficient heat dissipation and support device is suitable for efficient heat dissipation and support requirements in a space environment, and can also be applied to other occasions needing efficient heat dissipation and stable support, such as a ground high-performance computing center, precise medical equipment and the like.

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Description

Technical Field

[0001] The present invention relates to the technical field of space cryogenic refrigeration, and in particular to a mechanical refrigerator expander laminated heat dissipation and support structure. Background Art

[0002] The expander of the refrigerator consumes a lot of heat, and it needs to be assisted in cooling during use. Currently, most of the invention patents for cooling refrigerators are aimed at ground use environments, and most of them are air-cooled designs that effectively increase the convection area of the radiator, and water-cooled designs that increase the flow rate of the heat exchange medium; there is no description of the heat dissipation of the expander of the refrigerator for space use. In the vacuum environment of space, the air-cooled heat dissipation system loses its function, and the water-cooled heat dissipation system is not feasible.

[0003] Under space environment conditions, the heat dissipation of the expander needs to be conducted through the heat conduction of the structural materials to export the heat and radiate it to the cold space. In engineering practice, the heat of the expander is first conducted to the heat dissipation structure, and then the heat of the heat dissipation structure is exported and radiated to the cold space through radial cooling designs such as slotted heat pipes and radial cooling plates. The traditional heat dissipation structure in the expander space environment generally adopts the form of a pair of symmetrical structures docked. The space radiative cooling design of this heat dissipation structure must ensure that both docking structures are covered at the same time; under the development trend of compact space payloads and the existing space radiative cooling process conditions, this requirement is becoming increasingly difficult to achieve. Specifically, thermal management in space environments faces the following challenges:

[0004] (1) Low heat dissipation efficiency: There is a lack of air flow in the space environment, and traditional air cooling and water cooling methods cannot work effectively;

[0005] (2) Poor structural stability: Traditional heat dissipation structures are often unstable due to improper material selection or unreasonable design, which affects the long-term operating performance of the equipment.

[0006] (3) Inadequate thermal isolation performance: In a space environment, heat transfer between different temperature zones needs to be strictly controlled to avoid thermal interference affecting the normal operation of the equipment. Summary of the invention

[0007] The present invention provides a mechanical refrigerator expander laminated heat dissipation and support structure, aiming to solve the problems of low heat dissipation efficiency and unstable structure in the prior art and realize high-efficiency heat dissipation of the mechanical refrigerator expander.

[0008] In a first aspect, a mechanical refrigerator expander laminated heat dissipation and support structure is provided, including a heat sink and a heat sink plate, the heat sink and the heat sink plate are both made of metal materials with high thermal conductivity, and the heat sink and the heat sink plate constitute a laminated heat dissipation structure;

[0009] The heat sink includes a first heat sink area and a second heat sink area. The heat sink is formed with a groove platform in the first heat sink area. The heat sink is butt-jointed with the groove platform in the first heat sink area so that the total thickness of the first heat sink area and the heat sink is equal to the thickness of the second heat sink area. When projected in a direction perpendicular to the heat sink, the projection area of the heat sink is mirror-symmetrical to the projection area of the second heat sink area.

[0010] The heat sink is provided with a first half-open ring at a side close to the second heat dissipation area of the heat sink and at a middle position; the second heat dissipation area of the heat sink is provided with a second half-open ring at a side close to the heat sink and at a middle position; the opening of the first half-open ring and the opening of the second half-open ring are relatively butted against each other, so that the first half-open ring and the second half-open ring form a cylindrical hole groove; a clamping structure is provided at the cylindrical hole groove to fix it at the heat source position of the expander;

[0011] The mechanical refrigerator expander stack heat dissipation and support structure also includes four high thermal resistance connection structures, which are fixed corresponding to the four corners of the heat sink and are located on the side of the heat sink away from the heat sink; the high thermal resistance connection structure adopts a metal material with a low thermal conductivity coefficient, and the high thermal resistance connection structure includes a platform part and a cylindrical part; the platform part is in contact with the heat sink, and the cylindrical part is connected to the adjacent support structure.

[0012] In combination with the first aspect, in some implementations of the first aspect, the heat sink and the heat dissipation plate are tightly fitted with the aid of thermal grease or thermal pads.

[0013] In combination with the first aspect, in some implementations of the first aspect, the thickness of the heat sink is 2-3 mm, the thickness of the groove platform of the first heat dissipation area of the heat sink is 2-3 mm, and the thickness of the second heat dissipation area of the heat sink is 4-6 mm.

[0014] In combination with the first aspect, in some implementations of the first aspect, the heat sink and the heat sink plate are made of copper or aluminum.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the heat sink and the heat sink plate are both anodized or nickel-plated.

[0016] In conjunction with the first aspect, in certain implementations of the first aspect, the processing technology of the heat sink and the heat sink plate includes:

[0017] Precision casting: Use precision casting technology to make blanks of heat dissipation materials;

[0018] Machining: Use CNC machine tools for finishing to ensure surface flatness and parallelism;

[0019] Surface treatment: Surface treatment of the processed heat dissipation materials, including polishing and grinding.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the high thermal resistance connection structure uses titanium alloy TC4.

[0021] In combination with the first aspect, in certain implementations of the first aspect, the high thermal resistance connection structure is anodized or passivated.

[0022] In conjunction with the first aspect, in certain implementations of the first aspect, the processing technology of the thermal resistance connection structure includes:

[0023] Precision casting or laser cutting: Use precision casting technology to make blanks of connecting structures;

[0024] Machining: Use CNC machine tools for finishing to ensure the flatness and parallelism of the surface, and to ensure the position and dimensional accuracy of the mounting holes or threaded holes;

[0025] Surface treatment: Surface treatment of the completed connection structure, including polishing and grinding.

[0026] In conjunction with the first aspect, in certain implementations of the first aspect, the maintenance and care of the stack heat dissipation and support junction of the mechanical refrigerator expander includes:

[0027] Regularly check the tightness of the connection structure to ensure long-term operational reliability;

[0028] Clean regularly with a soft cloth and detergent to prevent dust and impurities from affecting heat dissipation performance, and avoid using highly corrosive solvents;

[0029] If any abnormal conditions are found, troubleshoot promptly; abnormal conditions include loose connections and poor thermal conductivity.

[0030] Compared with the prior art, the solution provided by the present invention includes at least the following beneficial technical effects:

[0031] (1) Efficient heat dissipation: The double-layer heat dissipation structure design improves the heat dissipation efficiency and simplifies the design of the space radiation cooling structure, which is particularly suitable for the application of compact space loads.

[0032] (2) Stable structure: The high thermal resistance connection structure not only provides sufficient rigidity to ensure the stable fixation of the heat dissipation structure, but also ensures dimensional stability due to its metal material, making it suitable for highly sensitive space loads;

[0033] (3) Thermal isolation performance: The structural form realizes the high thermal resistance characteristics of the connection structure, effectively isolates the heat transfer between different temperature areas, and adapts to the large temperature difference connection requirements in the space environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1It is a schematic diagram of the laminated heat dissipation and support structure of a mechanical refrigerator expander of the present invention.

[0035] Figure 2 It is a schematic diagram of a laminated heat dissipation structure 1 of the present invention.

[0036] Figure 3 It is a schematic diagram of a laminated heat dissipation structure 2 of the present invention.

[0037] Figure 4 This is a diagram of the high thermal resistance connection structure of the present invention.

[0038] Explanation of the reference numerals: 1. heat sink; 2. heat sink; 3. high thermal resistance connection structure; 4. screw. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1 As shown, the present invention provides a mechanical refrigerator expander laminated heat dissipation and support structure, including a heat sink 1 and a heat sink plate 2, and the heat sink 1 and the heat sink plate 2 constitute a laminated heat dissipation structure.

[0041] The heat sink 2 includes a first heat sink area and a second heat sink area. The heat sink 2 is formed with a groove platform in the first heat sink area. The heat sink 1 is docked and installed corresponding to the groove platform in the first heat sink area, so that the total thickness of the first heat sink area of the heat sink 2 and the heat sink 1 is equal to the thickness of the second heat sink area of the heat sink 2. When projected in a direction perpendicular to the heat sink 1, the projection area of the heat sink 1 can be mirror-symmetrical with the projection area of the second heat sink area of the heat sink 2.

[0042] The heat sink 1 is provided with a first half open loop at a side close to the second heat dissipation area of the heat sink 2 and at a middle position. The second heat dissipation area of the heat sink 2 is provided with a second half open loop at a side close to the heat sink 1 and at a middle position. The opening of the first half open loop and the opening of the second half open loop are relatively butted against each other so that the first half open loop and the second half open loop form a cylindrical hole groove. A locking structure is provided at the cylindrical hole groove so as to be fixed at the heat source position of the expander. The locking structure is used to ensure firm fixation, and screws 4 are used for fixing. The diameter and depth of the open loop structure should be precisely designed according to the structural dimensions of the internal heat source.

[0043] The mechanical refrigerator expander stack heat dissipation and support structure also includes four high thermal resistance connection structures 3, which are fixed corresponding to the four corners of the heat dissipation plate 2 and are located on the side of the heat dissipation plate 2 away from the heat sink 1 or the groove platform of the first heat dissipation area. Figure 4Schematic diagram of high thermal resistance connection structure 3. High thermal resistance connection structure 3 includes a platform portion and a cylindrical portion. The platform portion contacts the heat sink 2, and the cylindrical portion is connected to the adjacent support structure. The specific length of the cylindrical portion can be adjusted and designed according to the actual heat load and space limitations. The high thermal resistance connection structure 3 also includes mounting holes or threaded holes so that it can be fixed by connecting with screws 4.

[0044] In some embodiments, the heat sink 1 and the heat sink plate 2 are both made of metal materials with high thermal conductivity, such as copper or aluminum. These materials have good thermal conductivity and can effectively dissipate heat. Furthermore, the material selection of the heat sink 1 and the heat sink plate 2 is not limited to copper and aluminum, and other metal materials with high thermal conductivity may also be applicable.

[0045] In some embodiments, in order to improve the corrosion resistance and surface finish of the material, the heat sink 1 and the heat sink plate 2 may be anodized or nickel-plated.

[0046] In some embodiments, the thickness of the heat sink 1 is 2-3 mm, the thickness of the groove platform of the first heat dissipation area of the heat dissipation plate 2 is 2-3 mm, and the thickness of the second heat dissipation area of the heat dissipation plate 2 is 4-6 mm. The specific thickness can be adjusted according to the actual heat load and space limitations.

[0047] In some embodiments, the processing technology of the heat sink 1 and the heat sink plate 2 includes: precision casting: using precision casting technology to make the blank of the heat sink material to ensure the accuracy of shape and size; machining: using CNC machine tools for fine machining to ensure the flatness and parallelism of the surface. During the machining process, care should be taken to avoid material deformation; surface treatment: surface treatment of the processed heat sink material, such as polishing, grinding, etc., to improve the surface finish and thermal conductivity.

[0048] In some embodiments, the heat sink 1 and the heat sink plate 2 are closely attached, and a special tool is used to ensure the flatness and tightness of the contact surface. The heat sink 1 and the heat sink plate 2 can also be attached with thermal grease or thermal pads to improve the heat conduction efficiency.

[0049] In some embodiments, the high thermal resistance connection structure 3 is made of metal material and has sufficient dimensional stability. The high thermal resistance connection structure 3 has sufficient rigidity to ensure stable fixation of the heat dissipation structure.

[0050] Furthermore, the metal material of the high thermal resistance connection structure 3 is titanium alloy. The high thermal resistance connection structure 3 can be made of a metal material with low thermal conductivity, such as titanium alloy TC4. These materials have a low thermal conductivity and can effectively reduce the conduction of heat. In order to improve the corrosion resistance and surface finish of the material, anodizing or passivation treatment can be selected.

[0051] In some embodiments, the processing technology of the high thermal resistance connection structure 3 includes: precision casting or laser cutting: using precision casting technology to make the blank of the connection structure to ensure the accuracy of shape and size; machining: using CNC machine tools for fine machining to ensure the flatness and parallelism of the surface, and to ensure the position and size accuracy of the mounting holes or threaded holes. During the machining process, care should be taken to avoid material deformation; surface treatment: surface treatment of the finished connection structure, such as polishing, grinding, etc., to improve the surface finish and corrosion resistance.

[0052] In some embodiments, the maintenance and care of the mechanical refrigerator expander stack heat dissipation and support nodes include: regular inspection: regularly check the tightness of the connection structure to ensure the reliability of long-term operation; especially in high vibration or high and low temperature environments, the inspection frequency should be increased; cleaning and maintenance: regularly clean the heat dissipation structure and the connection structure to prevent dust and impurities from affecting the heat dissipation performance; use a soft cloth and detergent for cleaning, and avoid using highly corrosive solvents; troubleshooting: if any abnormal situation is found, troubleshoot in time; common faults include loose connections, poor thermal conductivity, etc., and damaged parts should be repaired or replaced in time.

[0053] In some embodiments, the mechanical refrigerator expander stacked heat dissipation and support structure provided by the present invention is suitable for large temperature difference connection requirements in space environments.

[0054] In some embodiments, the mechanical refrigerator expander laminated heat dissipation and support structure provided by the present invention can be integrated with other heat dissipation systems and support structures to improve overall performance.

[0055] To sum up, through the above detailed implementation methods, the efficient heat dissipation and stable support performance of the stacked heat dissipation and support structure of the mechanical refrigerator expander provided by the present invention can be ensured, which is suitable for various complex spatial environments and other scenarios requiring efficient heat dissipation and stable support.

[0056] Although the present invention is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. A mechanical refrigerator expander stack heat dissipation and support structure, characterized in that: The device comprises a heat sink (1) and a heat sink plate (2), wherein the heat sink (1) and the heat sink plate (2) are both made of metal materials with high thermal conductivity, and the heat sink (1) and the heat sink plate (2) form a laminated heat dissipation structure; The heat dissipation plate (2) comprises a first heat dissipation area and a second heat dissipation area, the heat dissipation plate (2) is formed with a groove platform in the first heat dissipation area, and the heat dissipation fin (1) is butt-jointed and installed corresponding to the groove platform in the first heat dissipation area, so that the total thickness of the first heat dissipation area of the heat dissipation plate (2) and the heat dissipation fin (1) is equal to the thickness of the second heat dissipation area of the heat dissipation plate (2); When projected in a direction perpendicular to the heat sink (1), the projected area of the heat sink (1) and the projected area of the second heat sink area of the heat sink (2) are mirror-symmetrical; The heat sink (1) is provided with a first half-open loop at a middle position on a side close to the second heat sink area of the heat sink (2); the second heat sink area of the heat sink (2) is provided with a second half-open loop at a middle position on a side close to the heat sink (1); The opening of the first half open ring and the opening of the second half open ring are relatively connected to each other, so that the first half open ring and the second half open ring form a cylindrical hole groove; a clamping structure is provided at the cylindrical hole groove to fix it at the heat source position of the expander; The mechanical refrigerator expander stack heat dissipation and support structure also includes four high thermal resistance connection structures (3), which are fixed corresponding to the four corners of the heat dissipation plate (2) and are located on the side of the heat dissipation plate (2) away from the heat sink (1); the high thermal resistance connection structure (3) is made of a metal material with a low thermal conductivity coefficient, and the high thermal resistance connection structure (3) includes a platform portion and a cylindrical portion; the platform portion is in contact with the heat dissipation plate (2), and the cylindrical portion is connected to the adjacent support structure.

2. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The heat sink (1) and the heat sink plate (2) are tightly fitted together using thermal grease or a thermal pad.

3. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The thickness of the heat sink (1) is 2 to 3 mm, the thickness of the groove platform in the first heat dissipation area of the heat dissipation plate (2) is 2 to 3 mm; and the thickness of the second heat dissipation area of the heat dissipation plate (2) is 4 to 6 mm.

4. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The heat sink (1) and the heat sink plate (2) are made of copper or aluminum.

5. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The heat sink (1) and the heat sink plate (2) are both subjected to anodizing or nickel plating.

6. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The processing technology of the heat sink (1) and the heat sink plate (2) includes: Precision casting: Use precision casting technology to make blanks of heat dissipation materials; Machining: Use CNC machine tools for finishing to ensure surface flatness and parallelism; Surface treatment: Surface treatment of the processed heat dissipation materials, including polishing and grinding.

7. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The high thermal resistance connection structure (3) is made of titanium alloy TC4.

8. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The high thermal resistance connection structure (3) is anodized or passivated.

9. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The processing technology of the thermal resistance connection structure (3) includes: Precision casting or laser cutting: Use precision casting technology to make blanks of connecting structures; Machining: Use CNC machine tools for finishing to ensure the flatness and parallelism of the surface, and to ensure the position and dimensional accuracy of the mounting holes or threaded holes; Surface treatment: Surface treatment of the completed connection structure, including polishing and grinding.

10. The mechanical refrigerator expander stack heat dissipation and support structure according to claim 1, characterized in that: The maintenance and care of the mechanical refrigerator expander stack heat dissipation and support junction includes: Regularly check the tightness of the connection structure to ensure long-term operational reliability; Clean regularly with a soft cloth and detergent to prevent dust and impurities from affecting heat dissipation performance, and avoid using highly corrosive solvents; If any abnormal conditions are found, troubleshoot promptly; abnormal conditions include loose connections and poor thermal conductivity.