Heat insulation and temperature resistance structure of sensitive part

Abstract

The utility model provides a heat insulation and temperature resistance structure of a sensitive component, the heat insulation and temperature resistance structure is provided with a container cavity and comprises a shell, a bearing base and a heat insulation aerogel layer, and the shell is fixed on the bearing base and provides an isolation space for the sensitive component and the heat insulation aerogel layer; a container cavity is formed by the bearing base and the shell and used for supporting the sensitive part and the heat insulation aerogel layer. And the heat insulation aerogel layer is fixed on the bearing base, is arranged on the peripheral surface of the sensitive part and is used for carrying out heat insulation protection on the sensitive part. According to the heat insulation and temperature resistance structure, the container cavity and the heat insulation aerogel layer are arranged, so that effective heat insulation protection is provided for the sensitive part, the influence of external extreme temperature on the performance of the sensitive part is prevented, and the service life of the sensitive part is prolonged. The problem of thermal protection of core components, tiny structures and devices in a measurement system is effectively solved, and the problems caused by inconsistent thermal matching between the components are solved from the structural design level.

Description

Technical Field

[0001] This utility model relates to the field of heat insulation and temperature resistance technology, and in particular to a heat insulation and temperature resistance structure for a sensitive component. Background Technology

[0002] In extreme temperature environments (e.g., below -40°C or above 300°C), transient temperature changes can easily cause structural changes, errors, or even damage to the core components of instruments in a testing system. Reducing the impact of temperature transients caused by thermal radiation, convection, and diffusion on sensitive elements has become a major technical challenge for high-temperature microelectronic devices.

[0003] Regarding existing technologies, while patents CN215064971U and CN213812675U disclose a microelectronic device capable of operating at high temperatures, neither of them includes a thermal protection design to address the risk of failure due to rapid temperature changes. Similarly, patents CN218098144U and CN115750053A employ traditional heat sinks and water circulation cooling to prevent rapid temperature changes in the sensor. However, such thermal protection methods suffer from large thermal protection areas and structural dimensions, making them unsuitable for applications where the size of the measurement system is limited.

[0004] Meanwhile, for some tiny heat-sensitive devices (where external temperature has a great impact on their structure and device, and it is not desirable for changes in external temperature to cause changes in the temperature of the structure and device) and self-heating devices (where the structure and device itself generates heat, and it is not desirable for the generated heat to be absorbed by the external environment), traditional thermal protection methods are insufficient to provide adequate protection for tiny structures and devices.

[0005] Therefore, since traditional thermal protection methods such as heat sinks, air cooling, and water cooling are not effective in application scenarios where the size of the measurement system is limited, as well as in the thermal protection of small heat-sensitive devices and self-heating devices, there is an urgent need to design a thermal insulation and temperature-resistant structure suitable for micro electronic devices to solve the above-mentioned technical problems. Utility Model Content

[0006] To address the aforementioned technical problems, this application provides a heat-insulating and temperature-resistant structure for sensitive components.

[0007] This invention proposes a heat-insulating and temperature-resistant structure for a sensitive component. The heat-insulating and temperature-resistant structure has a container cavity and includes a shell, a supporting base, and a heat-insulating aerogel layer. The shell is fixed to the supporting base, providing an isolation space between the sensitive component and the heat-insulating aerogel layer. The supporting base and the shell form a container cavity to support the sensitive component and the heat-insulating aerogel layer. The heat-insulating aerogel layer is fixed to the supporting base and disposed on the outer peripheral surface of the sensitive component for thermal insulation protection of the sensitive component.

[0008] Furthermore, the thermal insulation aerogel layer isolates and protects sensitive components from the external environment through potting or pre-molding. Potting is relatively simple and allows the thermal insulation aerogel layer to adhere tightly to the sensitive component, improving thermal insulation performance. Pre-molding allows for more precise dimensional control and better shape adaptability, ensuring a tighter fit between the thermal insulation aerogel layer and the sensitive component and container cavity, thus enhancing thermal insulation performance.

[0009] Furthermore, the prefabricated mold of the thermal insulation aerogel layer is assembled onto the support base using one or more of the following methods: adhesive bonding, brazing, and glass sealing. These multiple assembly methods increase design flexibility, allowing for the selection of appropriate connection methods based on different application scenarios and material properties. Adhesive bonding is simple to operate and low in cost; brazing provides high connection strength and is suitable for high-temperature environments; glass sealing offers excellent sealing performance, effectively preventing gas and liquid penetration and improving the stability and reliability of thermal insulation.

[0010] Furthermore, the aerogel in the thermal insulation aerogel layer is one or more of silica aerogel, alumina aerogel, and mullite aerogel. Different types of aerogels have different thermal insulation properties and high-temperature resistance characteristics. By selecting a combination of one or more aerogels, the performance of the thermal insulation aerogel layer can be adjusted according to specific application requirements, thereby improving its ability to adapt to different working environments.

[0011] Furthermore, the thermal insulation aerogel layer is composed of aerogel and composite materials, including one or more of ceramic fibers, glass fibers, and organic materials. The addition of composite materials can enhance the mechanical strength, stability, and other properties of the aerogel layer.

[0012] Furthermore, the housing also includes a cover plate, which is disposed on the upper surface of the housing. The cover plate further enhances the sealing of the heat-insulating and heat-resistant structure, preventing heat from entering from above, and also protects the internal sensitive components and the heat-insulating aerogel layer, preventing the entry of external impurities.

[0013] Furthermore, the sensitive component is the core element in the product used to sense changes in the external environment.

[0014] Furthermore, the assembly methods for the shell and supporting base include welding, riveting, pressing, gluing, and sintering. These multiple assembly methods provide more options for design and manufacturing.

[0015] Furthermore, the assembly methods for the sensitive component and the support base include adhesive bonding, brazing, and sintering. This provides a variety of options for the connection between the sensitive component and the support base.

[0016] Furthermore, the materials of the shell and / or supporting base include one or more of metals, ceramics, organic materials, and composites. By selecting different materials or combinations of materials, the performance requirements of thermal insulation and temperature-resistant structures for different application scenarios can be met, thereby improving their adaptability and reliability.

[0017] Compared with the prior art, the beneficial results of this utility model are as follows:

[0018] 1. By setting up a container cavity and a thermal insulation aerogel layer, effective thermal isolation protection is provided for sensitive components, preventing extreme external temperatures from affecting the performance of sensitive components and extending the service life of sensitive components.

[0019] 2. The installation methods of the thermal insulation aerogel layer by potting or prefabrication, as well as the various prefabrication assembly methods and the selection of different aerogel materials, increase the design flexibility and can meet the needs of different application scenarios.

[0020] 3. The selection of shell and support base materials allows the heat-insulating and temperature-resistant structure to adapt to various complex working conditions. At the same time, the multiple assembly methods of the shell and support base, as well as the multiple connection methods between sensitive components and the support base, improve the stability and applicability of the structure. Attached Figure Description

[0021] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0022] Figure 1 This is a cross-sectional view of the heat-insulating and temperature-resistant structure according to Embodiment 1 of this utility model;

[0023] Figure 2 This is a cross-sectional view of the heat-insulating and temperature-resistant structure according to Embodiment 2 of this utility model.

[0024] The meanings of the numbers in the diagram are as follows: 101-cover plate, 102-shell, 103-thermal insulation aerogel layer, 104-sensitive component, 105-support base, 106-container cavity, 201' cover plate', 202' shell', 203' thermal insulation aerogel layer', 204' sensitive component', 205' support base', 206' container cavity'. Detailed Implementation

[0025] In the following detailed description, reference is made to the accompanying drawings, which form part of the detailed description and illustrate illustrative specific embodiments in which the present invention may be practiced. In this regard, directional terms such as “top,” “bottom,” “left,” “right,” “up,” “down,” etc., are used with reference to the orientation of the described figures. Because components of the embodiments can be positioned in several different orientations, directional terms are used for illustrative purposes and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0026] This invention proposes a heat-insulating and temperature-resistant structure for a sensitive component, which is extremely small, only about 1 cubic centimeter in size, and is manufactured using conventional potting or adhesive bonding methods. The structure has a container cavity, with a cover plate at the top and a shell below. The cover plate is connected to the shell by welding, adhesive bonding, brazing, or sintering. Inside the shell, a support base is connected to the shell by specific methods such as welding, riveting, pressing, adhesive bonding, and sintering to form the container cavity. The sensitive component is connected to the support base by specific connection methods such as organic adhesives, inorganic adhesives, brazing, and glass sealing. A heat-insulating aerogel layer is placed on the outer wall of the sensitive component and the upper surface of the support base, or the heat-insulating aerogel layer encapsulates the sensitive component for isolation and protection. This can be achieved through potting or pre-molding followed by implantation, and thermal insulation protection can be achieved using organic adhesives, inorganic adhesives, brazing, glass sealing, etc. The sensitive component is surrounded by a thermal insulation aerogel layer, which covers the outer perimeter. The entire structure forms a relatively closed thermal insulation and temperature-resistant system, providing thermal insulation and temperature-locking protection for the sensitive component.

[0027] In specific embodiments, the projected shape of the housing can be circular, but is not limited to this shape. It primarily serves to isolate the sensitive component from the external environment and provide a container structure for the product. The housing material can be metal, ceramic, organic, or composite material. The projected shape of the support base can also be circular, but is not limited to this shape; it supports the sensitive component and the thermal insulation aerogel layer. The support base material can also be metal, ceramic, organic, or composite material. The sensitive component, as the core sensing component of the product, is used to sense the external environment. The thermal insulation aerogel layer can thermally insulate the sensitive component from the external environment through potting or pre-molding.

[0028] In specific embodiments, aerogel is a material with extremely low thermal conductivity and mass density. The fine nanonetwork structure of silica aerogel effectively restricts the propagation of localized thermal excitations, and its solid-state thermal conductivity is 2 to 3 orders of magnitude lower than that of corresponding glassy materials. The nanopores suppress the contribution of gas molecules to heat conduction. Silica aerogel has a refractive index close to 1 and an annihilation coefficient ratio for infrared and visible light exceeding 100, effectively transmitting sunlight while blocking infrared thermal radiation from ambient temperature, making it an ideal transparent thermal insulation material. Furthermore, by doping, the radiative thermal conductivity of aerogel can be further reduced, making it a novel high-temperature thermal insulation material. It can also form a good geometric structure in a small space, making it suitable for microstructured thermal protection materials.

[0029] Preferably, the aerogel in the thermal insulation aerogel layer can be silica aerogel, alumina aerogel, mullite aerogel, etc., but is not limited to these three materials. To increase the strength of the thermal insulation aerogel layer, the aerogel can be composited with one or both of ceramic fibers and glass fibers. To increase the flexibility of the thermal insulation aerogel layer, the aerogel can be composited with organic materials. In this application, the thermal insulation aerogel layer can be used to encapsulate sensitive components through potting, or a prefabricated thermal insulation aerogel layer can be made first, and then the sensitive components can be encapsulated using organic adhesives, inorganic adhesives, brazing, glass sealing, etc.

[0030] In specific embodiments, the housing and the supporting base are assembled by laser welding, piezoresistive welding, brazing, and adhesive bonding.

[0031] Figure 1 A cross-sectional view of the heat-insulating and temperature-resistant structure of Embodiment 1 of this utility model is shown, as follows. Figure 1As shown, in Embodiment 1, the cover plate 101 is connected to the shell 102 by welding, and the support base 105 is connected to the shell 102 by sintering to form a container cavity 106. The sensitive component 104 and the heat-insulating aerogel layer 103 are fixed in the container cavity 106. The sensitive component 104 and the support base 105 are connected by brazing. The heat-insulating aerogel layer 103 is applied to the outer peripheral surface of the sensitive component 104 by potting glue and covers the outer wall of the sensitive component 104. The heat insulation between the sensitive component 104 and the support base 105 is achieved by glass sealing.

[0032] Continue to refer to Figure 2 , Figure 2 A cross-sectional view of the heat-insulating and temperature-resistant structure of Embodiment 2 of this utility model is shown, as follows. Figure 2 As shown, in this heat-insulating and temperature-resistant structure, the support base '205' and the shell '202' are tightly connected by welding, ensuring structural stability. The sensitive component '204' is connected to the support base '205' by brazing, a connection method that minimizes the impact of heat conduction while ensuring connection strength. The cover plate '201' is also connected to the shell '202' by welding, further enhancing the sealing of the container cavity '206'. The heat-insulating aerogel layer '203' is pre-molded and then implanted between the sensitive component '204', the support base '205', and the cover plate '201. This assembly is thermally insulated by brazing. The heat-insulating aerogel layer '203', with its excellent heat insulation properties, effectively prevents heat transfer, providing a relatively stable temperature environment for the sensitive component '204'. This design considers both structural compactness and achieves good thermal insulation, making it suitable for applications with strict dimensional requirements.

[0033] The heat-insulating and temperature-resistant structure of the sensitive component in this application provides a relatively enclosed protective space for the sensitive component through the inclusion of a container cavity. The shell is fixed to the support base, ensuring the stability of the overall structure and effectively resisting external impacts and vibrations. The support base supports the sensitive component and the heat-insulating aerogel layer, ensuring the positional stability of the sensitive component. At the same time, the heat-insulating aerogel layer provides thermal insulation protection for the sensitive component, preventing the impact of external high or low temperature environments on the performance of the sensitive component, extending the service life of the sensitive component, and achieving temperature resistance protection against temperature transients. This ensures that the performance of the sensitive component remains stable under large temperature differences, enabling the protected product to maintain stable test performance in environments with rapid temperature changes.

[0034] Obviously, those skilled in the art can make various modifications and changes to the embodiments of this utility model without departing from the spirit and scope of this utility model. In this way, this utility model is also intended to cover such modifications and changes if they fall within the scope of the claims of this utility model and their equivalents. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are described in mutually different dependent claims does not indicate that a combination of these measures cannot be used for profit. Any reference numerals in the claims should not be considered as limiting the scope.

Claims

1. A heat-insulating and temperature-resistant structure for a sensitive component, characterized in that, The heat-insulating and temperature-resistant structure is provided with a container cavity, which includes a shell, a supporting base, and a heat-insulating aerogel layer, wherein, The housing is fixed to the supporting base, providing an isolation space between the sensitive components and the thermal insulation aerogel layer; The supporting base and the shell form the container cavity, which is used to support the sensitive components and the thermal insulation aerogel layer; The thermal insulation aerogel layer is fixed to the support base and disposed on the outer peripheral surface of the sensitive component to provide thermal insulation protection for the sensitive component.

2. The heat-insulating and temperature-resistant structure for a sensitive component according to claim 1, characterized in that, The thermal insulation aerogel layer isolates and protects the sensitive components from the external environment through potting or prefabrication.

3. The heat-insulating and temperature-resistant structure for a sensitive component according to claim 2, characterized in that, The prefabricated mold of the thermal insulation aerogel layer is assembled onto the support base by one or more of the following methods: adhesive bonding, brazing, and glass sealing.

4. The heat-insulating and temperature-resistant structure for a sensitive component according to claim 1, characterized in that, The aerogel in the thermal insulation aerogel layer is one of silica aerogel, alumina aerogel, and mullite aerogel.

5. The heat-insulating and temperature-resistant structure for a sensitive component according to claim 1, characterized in that, The housing also includes a cover plate disposed on the upper surface of the housing.

6. The heat-insulating and temperature-resistant structure for a sensitive component according to claim 1, characterized in that, The sensitive component is the core element in the product used to sense changes in the external environment.

7. The heat-insulating and temperature-resistant structure for a sensitive component according to claim 1, characterized in that, The assembly methods of the shell and the supporting base include welding, riveting, pressing, gluing and sintering.

8. The heat-insulating and temperature-resistant structure for a sensitive component according to claim 1, characterized in that, The assembly methods of the sensitive component and the supporting base include adhesive bonding, brazing, and sintering.

9. The heat-insulating and temperature-resistant structure for a sensitive component according to claim 1, characterized in that, The material of the shell and / or the supporting base includes one of metals, ceramics, and organic materials.

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