A heat pipe cooling system for a coronagraph loop
By combining the main and backup dual evaporator design with the uniform temperature heat pipe module, the problem of heat accumulation difficulties caused by uneven distribution of heating devices in the corona ray irradiator is solved, thereby improving the reliability and heat dissipation efficiency of the corona ray irradiator loop heat pipe system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-30
AI Technical Summary
In the existing technology, the discrete distribution of heating devices in the star corona instrument makes it difficult for heat to be efficiently concentrated to the evaporator. The single evaporator design has the risk of failure, and the thermal conductivity between the dispersed heat source and the evaporator is prone to uneven temperature distribution and large temperature difference at the mounting surface, which reduces heat dissipation efficiency and system reliability.
The design adopts a dual evaporator system with main and backup evaporators. The heat-generating equipment is connected to the heat collection plate and the heat pipe module to form a redundant heat dissipation channel. The heat pipe module and the channel heat pipe are used to achieve uniform heat transfer. Combined with thermally conductive filler and screw fixing, the heat is effectively introduced into the evaporator.
The on-orbit reliability of the coronagraph loop heat pipe system has been improved. Redundancy configuration is used to deal with potential failures, resulting in good thermal conductivity and high temperature uniformity of the evaporator mounting surface, reducing temperature difference, and improving heat dissipation efficiency and system reliability.
Smart Images
Figure CN224439493U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of space thermal control in aerospace technology, specifically to a heat pipe cooling system for a coronagraph loop. Background Technology
[0002] Loop heat pipes (LHPs) are key components in space thermal control within the aerospace field. They provide stable temperature control for satellite electronic equipment (such as communication modules and power systems) and sensitive devices (such as infrared detectors), ensuring their normal operation in extreme space environments (-270°C to +120°C). The evaporator of an LHP is one of the core components of the entire system. Connected to the heat dissipation equipment, the evaporator's function is to absorb and transfer heat through a phase change of the working fluid, driving the working fluid to circulate within the loop, ultimately achieving the goal of dissipating heat from the heat source.
[0003] However, in precision instruments such as coronagraphs, heat-generating devices are typically distributed in multiple locations within the internal space and are physically separated from the LHP evaporator, making it difficult for heat to be efficiently concentrated in the evaporator's main exhaust channel. In existing technologies, single-evaporator designs face the risk of on-orbit failure and lack sufficient redundancy; simultaneously, the thermal conductivity between dispersed heat sources and the evaporator relies on traditional heat conduction structures, which easily leads to uneven temperature distribution and large temperature differences at the mounting surfaces, significantly reducing heat dissipation efficiency and system reliability. Utility Model Content
[0004] To address the aforementioned problems in the existing technology, this utility model provides a heat pipe cooling system for a star coronagraph loop.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A heat pipe cooling system for a coronagraph loop includes an equipment mounting plate, a heat collection plate, a main loop heat pipe evaporator, and a backup loop heat pipe evaporator. The equipment mounting plate and the heat collection plate are connected by channeled heat pipes. Several discrete heating devices are mounted on the equipment mounting plate. The outer surface of the heat collection plate is provided with a main evaporator mounting surface and a backup evaporator mounting surface. The main loop heat pipe evaporator is heat-conducted and mounted on the heat collection plate through the main evaporator mounting surface, and the backup loop heat pipe evaporator is heat-conducted and mounted on the heat collection plate through the backup evaporator mounting surface.
[0007] Furthermore, a uniform heat pipe module is arranged on the heat collection plate.
[0008] Furthermore, the heat pipe module uses two heat pipes arranged in an I-shape.
[0009] Furthermore, the heating device is directly mounted on the equipment mounting plate by means of heat-conducting filler and screws.
[0010] Furthermore, a uniform heat pipe mounting groove is formed on the outer surface of the mounting surfaces of the two loop heat pipe evaporators, and the uniform heat pipe module is installed in the uniform heat pipe mounting groove. Furthermore, the surface of the uniform heat pipe mounting groove is provided with a uniform heat pipe cover plate that is flush with the mounting surfaces of the two evaporators.
[0011] Furthermore, the heat collection plate, the main evaporator mounting surface, the backup evaporator mounting surface, and the heat pipe mounting groove adopt an integrated structure.
[0012] Furthermore, the main loop heat pipe evaporator and the backup loop heat pipe evaporator are arranged side by side, and the length direction of the uniform temperature heat pipe is perpendicular to the length direction of the two loop heat pipe evaporators.
[0013] Furthermore, the main evaporator mounting surface and the backup evaporator mounting surface are thermally connected.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] This utility model proposes a loop heat pipe cooling system for a coronagraph. The evaporator adopts a backup design to improve the on-orbit reliability of the loop heat pipe system. The redundant configuration addresses potential failure risks. It is equipped with two loop heat pipe evaporators connected to the heat source mounting surface, meeting special requirements such as good thermal conductivity of the evaporator mounting surface, temperature uniformity, and small temperature difference between the main and backup mounting surfaces. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the heat dissipation system in the embodiment;
[0017] Figure 2 This is a schematic diagram of the installation of the heat pipe in the embodiment;
[0018] Figure 3 This is a schematic diagram of the structure of an evaporator without main and backup loop heat pipes installed;
[0019] Figure 4 Is Figure 3 A schematic diagram of a structure with a uniform heat pipe cover installed on the basis.
[0020] The diagram is labeled as follows: 1-Loop heat pipe evaporator, 101-Main loop heat pipe evaporator, 102-Backup loop heat pipe evaporator, 2-Heat collector plate, 201-Main and backup evaporator mounting surface, 202-Popular temperature heat pipe mounting groove, 203-Popular temperature heat pipe cover plate, 3-Aluminum ammonia channel heat pipe, 4-Heating equipment, 5-Equipment mounting plate, 6-Popular temperature heat pipe. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings.
[0022] The loop heat pipe evaporator of the corona radiator is the main heat dissipation channel for the electronic products inside the corona radiator. Since the heating devices of the corona radiator are distributed in multiple locations in the internal space and are all at a certain distance from the loop heat pipe evaporator, the heat conduction between each heat source and the heat pipe evaporator is established through the loop heat pipe heat dissipation system for the corona radiator provided by this utility model.
[0023] This embodiment describes a heat pipe cooling system for a coronagraph loop, such as... Figure 1 As shown, it mainly includes equipment mounting plate 5, heat collection plate 2, and loop heat pipe evaporator 1.
[0024] The equipment mounting plate 5 is mainly used to fix the discretely distributed heating devices 4 inside the coronagraph. In this embodiment, the heating devices 4 are preferably fixed directly on the equipment mounting plate 5 by means of thermally conductive filler and screws, and the heat is directly transferred to the heat collection plate 2.
[0025] The heat collection plate 2 and the equipment mounting plate 5 are connected by a channel heat pipe (such as an aluminum ammonia channel heat pipe 3) so that the dispersed heat of the heating device 4 is gathered to the heat collection plate 2.
[0026] In this embodiment, the evaporator adopts a main and backup dual evaporator design, such as... Figure 2 As shown, it includes a main loop heat pipe evaporator 101 and a backup loop heat pipe evaporator 102. The backup loop heat pipe evaporator 102 is a key means to improve the on-orbit reliability of the loop heat pipe system.
[0027] This embodiment is equipped with a dual-loop heat pipe evaporator connected to the heat source mounting surface. Specifically, the outer surface of the heat collector plate 2 is provided with a main evaporator mounting surface and a backup evaporator mounting surface, such as... Figure 3-4 In this embodiment, the main and backup evaporator mounting surfaces 201 are thermally connected by pre-installed aluminum-ammonia channel heat pipes, which reduces the temperature difference between the two mounting surfaces, improves heat dissipation efficiency, and enhances the overall heat dissipation capacity and reliability of the equipment. The main loop heat pipe evaporator 101 is thermally connected to the heat collector plate 2 via the main evaporator mounting surface, and the backup loop heat pipe evaporator 102 is thermally connected to the heat collector plate 2 via the backup evaporator mounting surface. This structure forms redundant heat dissipation channels, which can significantly improve on-orbit reliability. In this embodiment, the main frame of the module thermally connected to the evaporator is preferably designed and manufactured as an integrated unit to reduce thermal resistance.
[0028] To minimize the impact on the external environment of the coronagraph, this embodiment employs a design where a groove is cut into the evaporator mounting surface, and two heat pipes are installed within the groove. For example... Figure 3As shown, a heat pipe mounting groove 202 is provided on the heat collector plate 2, and two φ15*30 I-shaped heat pipes 6 are arranged in parallel within the groove to provide better heat sink temperature for each unit. To ensure heat dissipation effect, the heat pipes need to be close to the evaporator; therefore, this embodiment adopts a groove-cutting scheme from the outside. The length direction of the heat pipes 6 is perpendicular to the length direction of the main and standby evaporators to maximize the temperature uniformity. The surface of the heat pipe mounting groove 202 is covered with a heat pipe cover plate 203, making the cover plate flush with the evaporator mounting surface. Figure 4 This reduces external thermal interference and improves structural strength. The uniform heat pipe 6 evenly transfers heat to the mounting surfaces of the main and backup evaporators. Combined with the direct thermal connection between the two, it ensures that the temperature difference between the mounting surfaces is minimized, thereby improving heat dissipation efficiency.
[0029] During operation, the heat generated by the heating device 4 is bidirectionally conducted to the main loop heat pipe evaporator 101 and the backup loop heat pipe evaporator 102 via the equipment mounting plate 5, the aluminum-ammonia channel heat pipe 3, the heat collection plate 2, and the uniform temperature heat pipe 6. The evaporators drive the heat circulation and dissipation through the phase change of the working fluid, thereby achieving a uniform and stable internal temperature of the coronagraph.
[0030] The above embodiments are merely typical implementations of this utility model and are not intended to limit the scope of this utility model. All equivalent substitutions or improvements made within the scope of the claims of this utility model are protected by this utility model.
Claims
1. A loop heat pipe heat dissipation system for a star-crown instrument, characterized in that, It includes an equipment mounting plate, a heat collection plate, a main loop heat pipe evaporator, and a backup loop heat pipe evaporator. The equipment mounting plate and the heat collection plate are connected by channeled heat pipes. Several discrete heating devices are mounted on the equipment mounting plate. The outer surface of the heat collection plate is provided with a main evaporator mounting surface and a backup evaporator mounting surface. The main loop heat pipe evaporator is heat-conducted and mounted on the heat collection plate through the main evaporator mounting surface, and the backup loop heat pipe evaporator is heat-conducted and mounted on the heat collection plate through the backup evaporator mounting surface.
2. A loop heat pipe heat dissipation system for a star veil instrument according to claim 1, wherein, The heat collection plate is equipped with a uniform temperature heat pipe module.
3. A loop heat pipe heat dissipation system for a star veil instrument according to claim 2, wherein, The heat pipe module uses two heat pipes arranged in an I-shape.
4. The heat pipe cooling system for a coronagraph loop as described in claim 1, characterized in that, The heating device is directly mounted on the equipment mounting plate by means of heat-conducting filler and screws.
5. A heat pipe cooling system for a coronagraph loop according to claim 2, characterized in that, A uniform temperature heat pipe mounting groove is provided on the outer side of the mounting surface of the two loop heat pipe evaporators, and the uniform temperature heat pipe module is installed in the uniform temperature heat pipe mounting groove.
6. A heat pipe cooling system for a coronagraph loop according to claim 5, characterized in that, The surface of the uniform temperature heat pipe mounting groove is provided with a uniform temperature heat pipe cover plate that is flush with the mounting surfaces of the two evaporators.
7. A heat pipe cooling system for a coronagraph loop according to claim 5, characterized in that, The heat collection plate, the main evaporator mounting surface, the backup evaporator mounting surface, and the heat pipe mounting groove adopt an integrated structure.
8. A heat pipe cooling system for a coronagraph loop according to claim 3, characterized in that, The main loop heat pipe evaporator and the backup loop heat pipe evaporator are arranged side by side, and the length direction of the uniform temperature heat pipe is perpendicular to the length direction of the two loop heat pipe evaporators.
9. A heat pipe cooling system for a coronagraph loop according to claim 3, characterized in that, The mounting surfaces of the main evaporator and the backup evaporator are thermally connected.