A lightweight radiator and control method for space remote sensors based on embedded heat pipes

Abstract

This invention belongs to the field of aerospace thermal control technology and discloses a lightweight radiator for space remote sensors based on an embedded heat pipe and a control method. A heat distribution layer is bonded to the upper side of the radiating plate; a honeycomb layer is disposed in the middle of the radiating plate, with a non-radiating surface bonded to the upper side of the honeycomb layer and a radiating surface bonded to the lower side; an embedded heat pipe is inserted through the middle of the honeycomb layer; an external heat pipe is disposed in the heat distribution layer, and a flexible high thermal conductivity material layer is disposed on the outside of the external heat pipe. This invention conducts heat from the remote sensor to the space radiator through the external heat pipe. The high thermal conductivity material is laid on the external heat pipe and the non-radiating surface, allowing heat to be evenly distributed on the non-radiating surface. The embedded heat pipe isotherms the radiating surface, improving the temperature uniformity of the radiating surface and further increasing the heat dissipation efficiency of the space radiator. This effectively solves the contradiction between heat dissipation and radiator size under resource-constrained conditions in space remote sensors. Furthermore, it is lightweight, has good structural strength, and strong earthquake resistance.

Description

Technical Field

[0001] This invention belongs to the field of aerospace thermal control technology, and in particular relates to a lightweight radiator and control method for a space remote sensor based on an embedded heat pipe. Background Technology

[0002] Currently, unlike the terrestrial environment, the cosmic background is considered a 4K cold black heat sink. The only heat exchange between remote sensing instruments operating in outer space and outer space is thermal radiation. Space radiators are the terminal components for heat dissipation by these instruments. The heat dissipation capacity of a space radiator is directly proportional to the surface characteristics and heat dissipation area of ​​its radiating surface, and is also affected by factors such as the distribution of the heat load and the temperature uniformity of the radiating surface. Once the coating and dimensions of the radiating surface are determined, how to evenly distribute the heat load on the space radiator and improve the temperature uniformity of the radiating surface becomes a pressing problem to solve in order to improve the heat dissipation efficiency of the space radiator.

[0003] Based on the above analysis, the problems and shortcomings of the existing technology are as follows:

[0004] Existing space radiators suffer from uneven heat distribution and low temperature uniformity on the radiating surface, resulting in low heat dissipation efficiency.

[0005] To increase the heat dissipation of space radiators, the method of increasing the heat dissipation surface area is usually adopted. However, increasing the radiating surface area introduces requirements for the external size and weight, which conflicts with the limited on-board resources.

[0006] Given the constraints of weight and size, improving the heat dissipation capacity and efficiency of space radiators is crucial. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides a lightweight radiator and control method for a space remote sensor based on an embedded heat pipe.

[0008] The present invention is implemented as follows: a lightweight radiator for a space remote sensor based on an embedded heat pipe includes two parts: a radiating plate and a heat distribution layer.

[0009] The radiant plate has a honeycomb layer in the middle, a non-radiant surface is bonded to the upper side of the honeycomb layer, a radiant surface is bonded to the lower side of the honeycomb layer, and an embedded heat pipe is inserted in the middle of the honeycomb layer.

[0010] The heat distribution layer is provided with an external heat pipe, and a flexible, highly thermally conductive material layer is provided on the outside of the external heat pipe.

[0011] Furthermore, the cold end of the external heat pipe is fixed to the radiant plate with screws.

[0012] Furthermore, the flexible high thermal conductivity material layer is bonded and covered on the surface of the non-radiative surface and the external heat pipe.

[0013] Furthermore, the embedded heat pipe is arranged perpendicularly to the external heat pipe.

[0014] Furthermore, the flexible high thermal conductivity material layer is bonded with a multi-layer thermal insulation component on the outside. The multi-layer thermal insulation component is provided with multiple unit-layer thermal insulation components, and each unit-layer thermal insulation component is a layer of double-sided aluminized film covered with a layer of polyester mesh.

[0015] Another objective of this invention is to provide a control method for implementing the aforementioned lightweight radiator for a space remote sensor based on an embedded heat pipe. The control method includes: the remote sensor conducts the heat to be dissipated to a non-radiative surface through an externally attached heat pipe; a high thermal conductivity material layer evenly distributes the heat on the non-radiative surface; and the embedded heat pipe enhances the heat conduction from the non-radiative surface to the radiative surface.

[0016] Another object of the present invention is to provide a remote sensor equipped with the aforementioned lightweight radiator for a space remote sensor based on an embedded heat pipe.

[0017] Combining all the above technical solutions, the advantages and positive effects of this invention are as follows: the external heat pipes and internal heat pipes of this invention are orthogonally distributed. The external heat pipes conduct heat from the remote sensor to the space radiator. High thermal conductivity material is laid on the external heat pipes and non-radiative surfaces, allowing heat to be evenly distributed on the non-radiative surfaces. The internal heat pipes are used to isothermize the radiative surfaces, improving the temperature uniformity of the radiative surfaces and further increasing the heat dissipation efficiency of the space radiator. The table below shows a simulation comparison of the heat dissipation of a 0.5m × 0.5m space radiator in a vacuum environment at 20℃, whether or not this invention is used.

[0018] Heat source distribution method Heat source temperature conventional radiators Embedded heat pipes only This invention Centralized 36.5℃ 31W 38W 71W Distributed 36.5℃ 60W 66W 85W

[0019] The present invention provides a lightweight radiator for space remote sensors based on an embedded heat pipe, which can improve the heat dissipation efficiency of space radiators, effectively solve the contradiction between heat dissipation and radiator size under resource-constrained conditions, and is lightweight, structurally strong, and earthquake-resistant. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a schematic diagram of a lightweight radiator structure for a space remote sensor based on an embedded heat pipe, provided in an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the honeycomb layer structure provided in an embodiment of the present invention.

[0023] In the diagram: 1. Multi-layer thermal insulation component; 2. Flexible high thermal conductivity material layer; 3. External heat pipe; 4. Non-radiative surface; 5. Internal heat pipe; 6. Honeycomb layer; 7. Radiative surface. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] To address the problems existing in the prior art, the present invention provides a lightweight radiator and control method for a space remote sensor based on an embedded heat pipe. The present invention will be described in detail below with reference to the accompanying drawings.

[0026] like Figure 1 and Figure 2 As shown, the lightweight radiator for space remote sensors based on embedded heat pipes provided in this embodiment of the invention consists of a multi-layer heat insulation component 1, a flexible high thermal conductivity material layer 2, an external heat pipe 3, a non-radiating surface 4, an embedded heat pipe 5, a honeycomb layer 6, and a radiating surface 7.

[0027] The non-radiative surface 4, the embedded heat pipe 5, the honeycomb layer 6, and the radiative surface 7 form a closed honeycomb panel structure, which is self-contained and bonded together. The honeycomb layer 6 is made of aluminum honeycomb, and both the radiative surface 7 and the non-radiative surface 4 are made of thermally conductive material. The cold end of the external heat pipe 3 is installed on the non-radiative surface and fixed to the radiative plate with screws. Flexible, high thermal conductivity material is bonded to the surfaces of the non-radiative surface and the external heat pipe, achieving a fixed connection with the radiative plate. The embedded heat pipe and the external heat pipe form an orthogonal heat pipe network.

[0028] In this embodiment, the lightweight radiator has dimensions of 950mm × 740mm:

[0029] The multi-layer thermal insulation component 1 is a 15-unit thermal insulation component, and each unit layer thermal insulation component consists of a double-sided aluminum-coated film and a polyester mesh.

[0030] The flexible high thermal conductivity material layer 2 is a thermally conductive graphite layer with a thickness of 0.5 mm.

[0031] The external heat pipe 3 is an Ω-shaped channel heat pipe with a diameter of Φ10×30.

[0032] The non-radiative surface 4 is an aluminum skin with a thickness of 0.3 mm.

[0033] The embedded heat pipe 5 is a rectangular channel heat pipe with a diameter of 19.4 × 9.1 mm.

[0034] The honeycomb 6 is an aluminum honeycomb, LF12 series.

[0035] The radiating surface 7 is an aluminum skin with OSR glued to its surface, and the thickness of the aluminum skin is 0.3 mm.

[0036] When in use, the remote sensor conducts the heat that needs to be dissipated to the non-radiative surface through the external heat pipe 3. The high thermal conductivity material layer distributes the heat evenly on the non-radiative surface. The internal heat pipe 5 enhances the heat conduction from the non-radiative surface to the radiative surface, improves the temperature uniformity of the radiative surface, reduces the temperature gradient within the radiative surface, and improves the heat dissipation efficiency of the radiative surface to the external space.

[0037] The test results under room temperature conditions are as follows.

[0038] Heat source distribution method Heat source temperature This invention Centralized 39℃ 263W

[0039] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lightweight radiator for space remote sensing based on an embedded heat pipe, characterized in that, The lightweight radiator of the space remote sensor based on the embedded heat pipe is equipped with: Radiant panel; A heat distribution layer is bonded to the upper side of the radiant plate; The radiant plate has a honeycomb layer in the middle, a non-radiant surface is bonded to the upper side of the honeycomb layer, a radiant surface is bonded to the lower side of the honeycomb layer, and an embedded heat pipe is inserted in the middle of the honeycomb layer. The heat distribution layer is provided with an external heat pipe, and a flexible high thermal conductivity material layer is provided on the outside of the external heat pipe; The flexible, highly thermally conductive material layer is bonded and covered on the surface of the non-radiative surface and the externally attached heat pipe; The external heat pipe is fixed to the radiant plate; The flexible, highly thermally conductive material layer is a thermally conductive graphite layer with a thickness of 0.5 mm; The flexible high thermal conductivity material layer is bonded with a multi-layer thermal insulation component on the outside. The multi-layer thermal insulation component is provided with multiple unit thermal insulation components. Each unit thermal insulation component is provided with a double-sided aluminum-coated film and a polyester mesh.

2. The lightweight radiator for space remote sensing based on an embedded heat pipe as described in claim 1, characterized in that, The cold end of the external heat pipe is fixed to the radiant plate with screws.

3. The lightweight radiator for space remote sensing based on an embedded heat pipe as described in claim 1, characterized in that, The embedded heat pipe is arranged perpendicularly to the external heat pipe.

4. The lightweight radiator for space remote sensing based on an embedded heat pipe as described in claim 1, characterized in that, The external heat pipe is a Φ10×50 Ω-shaped channel heat pipe.

5. The lightweight radiator for space remote sensing based on an embedded heat pipe as described in claim 1, characterized in that, The non-radiative surface is an aluminum skin with a thickness of 0.3 mm; The embedded heat pipe is a rectangular channel heat pipe with dimensions of 19.4 × 9.1 mm.

6. The lightweight radiator for space remote sensing based on an embedded heat pipe as described in claim 1, characterized in that, The honeycomb is an aluminum honeycomb, LF12 series; The radiating surface is an aluminum skin with OSR glued to its surface, and the thickness of the aluminum skin is 0.3 mm.

7. A control method for a lightweight radiator for a space remote sensor based on an embedded heat pipe, as described in any one of claims 1 to 6, characterized in that, The control method includes: a remote sensor conducts the heat to be dissipated to the non-radiative surface through an external heat pipe; a high thermal conductivity material layer distributes the heat evenly on the non-radiative surface; and an internal heat pipe enhances the heat conduction from the non-radiative surface to the radiative surface.

8. A remote sensor, characterized in that, The remote sensor is equipped with a lightweight radiator for a space remote sensor based on an embedded heat pipe, as described in any one of claims 1 to 6.

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