A multi-layer composite insulation layer structure with low heat transmission

Abstract

This utility model discloses a multi-layer composite thermal insulation layer structure with low heat transfer rate, including a thermal insulation mechanism comprising an inner buffer layer, a middle thermal insulation main functional layer, and an outer protective layer. The inner buffer layer is bonded and fixed to the surface of the test chamber. The inner buffer layer, the middle thermal insulation main functional layer, and the outer protective layer are bonded together using a gradient interface bonding process. The inner buffer layer is made of closed-cell EPDM rubber, the middle thermal insulation main functional layer is made of porous vacuum silicone material, and the outer protective layer is made of high-strength polyimide fiber reinforced composite material. The total thickness of the thermal insulation mechanism is 20-30 mm. This structure has excellent thermal insulation performance, strong environmental adaptability, and structural stability, reducing the energy consumption of the test chamber. It is suitable for environmental test chambers. Sealing the junction between the top of the thermal insulation mechanism and the top of the test chamber further improves the sealing performance and enhances the thermal insulation effect.

Description

Technical Field

[0001] This utility model relates to the field of environmental testing equipment technology, specifically to a multi-layer composite insulation layer structure with low heat transfer rate. Background Technology

[0002] Environmental test chambers are experimental devices used to simulate different environmental conditions (such as high and low temperatures, humidity, etc.) and are widely used in electronics, automotive, aerospace, materials and other fields. To ensure the stability and accuracy of the internal environmental conditions of the test chamber, the thermal insulation performance of its chamber is crucial.

[0003] Traditional environmental test chambers often use a single insulation material, such as polyurethane foam or rock wool. However, these single materials have limited insulation effects and high heat transfer rates, making the internal temperature of the test chamber easily affected by the external environment. This not only affects the accuracy of experimental data but also increases the energy consumption of the equipment and raises the operating costs. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer composite insulation layer structure with low heat transfer rate to solve the problems mentioned in the background art. To solve the above technical problems, this invention is achieved through the following technical solution:

[0005] This utility model relates to a multi-layer composite thermal insulation layer structure with low heat transfer rate, comprising:

[0006] A heat insulation mechanism is bonded and fixed to the surface of the test chamber.

[0007] The heat insulation mechanism includes an inner buffer layer, a middle heat insulation main functional layer, and an outer protective layer;

[0008] The inner buffer layer is bonded and fixed to the surface of the test chamber. The inner buffer layer, the middle thermal insulation main functional layer, and the outer protective layer are bonded together using a gradient interface bonding process. The inner buffer layer is made of closed-cell EPDM rubber, the middle thermal insulation main functional layer is made of porous vacuum silicone material, and the outer protective layer is made of high-strength polyimide fiber reinforced composite material. The total thickness of the inner buffer layer, the middle thermal insulation main functional layer, and the outer protective layer is 20-30 mm.

[0009] Furthermore, the inner buffer layer is fixedly connected to a first ladder column, and there are multiple first ladder columns. The bottom surface of the middle heat insulation main functional layer is provided with a first ladder groove, and there are multiple first ladder grooves. After the multiple first ladder columns are embedded in the first ladder grooves, they are bonded and fixed together by nano-modified adhesive.

[0010] Furthermore, the bottom surface of the outer protective layer is fixedly connected with a second ladder column, and there are multiple second ladder columns. The top surface of the middle heat insulation main functional layer is provided with a second ladder groove, and there are multiple second ladder grooves. After the multiple second ladder columns are embedded in the second ladder grooves, they are bonded and fixed together by nano-modified adhesive.

[0011] Furthermore, the bottom surface of the inner buffer layer is fixedly connected with a boss, and there are multiple bosses. After the bosses are attached to the surface of the test chamber, they are fixed with adhesive.

[0012] Furthermore, it also includes an edge banding mechanism, which includes a straight sealing plate and a corner sealing plate;

[0013] There are four straight sealing plates, which are respectively inserted into the four corners of the heat insulation mechanism and the test chamber. There are four corner sealing plates, which are respectively inserted into the four sides of the heat insulation mechanism and the test chamber. The two ends of the straight sealing plates are respectively inserted into the ends of the corner sealing plates.

[0014] Furthermore, the corner sealing plate has a second fitting groove at both ends, and a second through hole is formed on the surface of the second fitting groove. The inner wall of the straight sealing plate has a first fitting groove, and a first through hole is formed in the middle of the first fitting groove. The side wall of the heat insulation mechanism has a third through hole. The first fitting groove and the second fitting groove fit together. A screw rod passes through the first through hole, the second through hole, and the third through hole. A nut is threaded onto the screw rod.

[0015] Furthermore, the screw is fitted with a rubber ring, the size of which is consistent with the size of the first through hole, the second through hole, and the third through hole.

[0016] This utility model has the following beneficial effects:

[0017] This invention improves the heat preservation effect by combining the high-strength polyimide fiber reinforced composite material of the outer protective layer, the three-dimensional honeycomb porous vacuum silicon material of the middle protective layer, and the closed-cell EPDM rubber material of the inner buffer layer. This reduces the heat exchange between the inside and outside of the chamber, thereby reducing the energy consumption of the test chamber and making the internal temperature of the test chamber less susceptible to the influence of the external environment, thus improving the test accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the second-view structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the heat insulation mechanism of this utility model;

[0022] Figure 4 This utility model Figure 2 A schematic diagram of part A in the diagram.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 100. Thermal insulation mechanism; 110. Inner buffer layer; 111. First ladder column; 112. Boss; 120. Middle thermal insulation main functional layer; 121. First ladder groove; 122. Second ladder groove; 130. Outer protective layer; 131. Second ladder column;

[0025] 210. Straight sealing plate; 211. First fitting groove; 212. First through hole; 220. Corner sealing plate; 221. Second fitting groove; 222. Second through hole; 230. Third through hole; 240. Screw; 250. Nut; 260. Rubber ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] Please see Figure 1-4 As shown, this utility model is a multi-layer composite thermal insulation layer structure with low heat transfer rate, comprising:

[0029] The heat insulation mechanism 100 is bonded and fixed to the surface of the test chamber.

[0030] The thermal insulation mechanism 100 includes an inner buffer layer 110, a middle thermal insulation main functional layer 120, and an outer protective layer 130;

[0031] The inner buffer layer 110 is bonded and fixed to the surface of the test chamber. The inner buffer layer 110, the middle thermal insulation main functional layer 120 and the outer protective layer 130 are bonded together using a gradient interface bonding process. The inner buffer layer 110 is made of closed-cell EPDM rubber material, the middle thermal insulation main functional layer 120 is made of porous vacuum silicone material, and the outer protective layer 130 is made of high-strength polyimide fiber reinforced composite material. The total thickness of the inner buffer layer 110, the middle thermal insulation main functional layer 120 and the outer protective layer 130 is 20-30mm. Through the synergistic effect of the high-strength polyimide fiber reinforced composite material of the outer protective layer 130, the three-dimensional honeycomb structure porous vacuum silicone material of the middle protective layer 120 and the closed-cell EPDM rubber material of the inner buffer layer 110, the heat preservation effect is improved and the heat exchange between the inside and outside of the chamber is reduced.

[0032] The inner buffer layer 110 has multiple first ladder columns 111 fixedly connected to its surface. The middle thermal insulation main functional layer 120 has multiple first ladder grooves 121 on its bottom surface. The multiple first ladder columns 111 are embedded in the first ladder grooves 121 and then bonded together with nano-modified adhesive. The first ladder columns 111 are embedded in the first ladder grooves 121, thereby increasing the contact area between the inner buffer layer 110 and the middle thermal insulation main functional layer 120 and dispersing stress. This eliminates stress concentration caused by abrupt changes in interface properties in traditional bonding, thereby significantly improving bonding strength, durability and reliability.

[0033] The bottom surface of the outer protective layer 130 is fixedly connected with a second ladder column 131, and there are multiple second ladder columns 131. The top surface of the middle thermal insulation main functional layer 120 is provided with a second ladder groove 122, and there are multiple second ladder grooves 122. After the multiple second ladder columns 131 are embedded in the second ladder grooves 122, they are bonded together by nano-modified adhesive. By embedding the second ladder columns 131 in the second ladder grooves 122, the contact area between the middle thermal insulation main functional layer 120 and the outer protective layer 130 is increased and the stress is dispersed. This eliminates the stress concentration caused by the sudden change in interface performance in traditional bonding, thereby significantly improving the bonding strength, durability and reliability.

[0034] The bottom surface of the inner buffer layer 110 is fixedly connected with a boss 112. There are multiple bosses 112. After the bosses 112 are attached to the surface of the test chamber, they are fixed with adhesive. The bosses 112 are arranged in a regular manner and face one side of the stainless steel inner groove to improve the fit.

[0035] Working principle: The middle insulation main functional layer 120 is made of porous vacuum silicon material. Its internal hexahedral three-dimensional honeycomb structure forms a large number of independent and closed vacuum cavities. There are very few air molecules in the vacuum environment, which greatly reduces heat transfer caused by molecular collisions. The three-dimensional honeycomb structure divides the heat conduction path into a discontinuous path of "honeycomb wall-vacuum cavity", extending the heat transfer distance. The outer protective layer 130 is made of high-strength polyimide fiber reinforced composite material, which can resist external environmental interference and avoid direct damage to the middle vacuum structure by high temperature, high humidity or mechanical impact. When the inner buffer layer 110 is bonded to the test chamber, the boss 112 fills the tiny pits or gaps on the surface of the metal inner groove by slight compression, avoiding local heat leakage caused by air convection in the gaps. Through the gradient interface bonding process, stress concentration caused by abrupt changes in interface performance in traditional bonding is eliminated, thereby significantly improving the bonding strength, durability and reliability, improving the heat preservation effect, reducing the heat exchange between the inside and outside of the chamber, thereby reducing the energy consumption of the test chamber, making the internal temperature of the test chamber less affected by the external environment and improving the test accuracy.

[0036] Please see Figure 1-4 As shown, this embodiment, based on the above embodiment, further includes:

[0037] The edge banding mechanism includes a straight sealing plate 210 and a corner sealing plate 220.

[0038] There are four straight sealing plates 210, which are respectively inserted into the four corners of the heat insulation mechanism 100 and the test chamber. There are four corner sealing plates 220, which are respectively inserted into the four sides of the heat insulation mechanism 100 and the test chamber. The two ends of the straight sealing plates 210 are respectively inserted into the ends of the corner sealing plates 220. The four straight sealing plates 210 and the four corner sealing plates 220 are respectively inserted into the top of the heat insulation mechanism 100 and the top of the test chamber, so that the junction between the top of the heat insulation mechanism 100 and the top of the test chamber is sealed, thereby improving the sealing performance and enhancing the heat insulation effect.

[0039] The corner sealing plate 220 has second fitting grooves 221 at both ends, and second through holes 222 on the surface of the second fitting grooves 221. The straight sealing plate 210 has a first fitting groove 211 on its inner wall, and a first through hole 212 in the middle of the first fitting groove 211. The heat insulation mechanism 100 has a third through hole 230 on its side wall. The first fitting grooves 211 and the second fitting grooves 221 fit together. A screw 240 passes through the first through hole 212, the second through hole 222, and the third through hole 230. The screw 240 is threaded. After the nut 250 is connected, the straight sealing plate 210 and the corner sealing plate 220 are respectively clamped into the heat insulation mechanism 100 and the top of the test chamber, so that the second fitting groove 221 and the first fitting groove 211 are fitted together, thereby connecting the ends of the straight sealing plate 210 and the corner sealing plate 220. Then, the screw 240 is passed through the first through hole 212, the second through hole 222, and the third through hole 230 and screwed into the nut 250 to fix the straight sealing plate 210 and the corner sealing plate 220 at the junction of the heat insulation mechanism 100 and the test chamber.

[0040] A rubber ring 260 is fitted onto the screw 240. The size of the rubber ring 260 is consistent with the size of the first through hole 212, the second through hole 222, and the third through hole 230. After the nut 250 is screwed into the screw 240, it squeezes the rubber ring 260, causing the rubber ring 260 to be compressed and deformed to block the first through hole 212, the second through hole 222, and the third through hole 230, thereby improving the sealing performance.

[0041] Working principle: Four straight sealing plates 210 and four corner sealing plates 220 are respectively inserted into the heat insulation mechanism 100 and the top of the test chamber, so that the second fitting groove 221 and the first fitting groove 211 are fitted together, thereby connecting the ends of the straight sealing plates 210 and the corner sealing plates 220. Then, the screw 240 is passed through the first through hole 212, the second through hole 222, and the third through hole 230 and tightened with the nut 250, so that the straight sealing plates 210 and the corner sealing plates 220 are fixed at the junction of the heat insulation mechanism 100 and the test chamber. After the nut 250 is screwed into the screw 240, it squeezes the rubber ring 260, so that the rubber ring 260 is compressed and deformed to block the first through hole 212, the second through hole 222, and the third through hole 230, thus sealing the junction of the top of the heat insulation mechanism 100 and the top of the test chamber, further improving the sealing performance and enhancing the heat insulation effect.

[0042] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-layer composite thermal insulation layer structure with low heat transfer rate, characterized in that, include: A heat insulation mechanism (100) is bonded and fixed to the surface of the test chamber; The heat insulation mechanism (100) includes an inner buffer layer (110), a middle heat insulation main functional layer (120), and an outer protective layer (130); The inner buffer layer (110) is bonded and fixed to the surface of the test chamber. The inner buffer layer (110), the middle thermal insulation main functional layer (120) and the outer protective layer (130) are bonded together by a gradient interface bonding process. The inner buffer layer (110) is made of closed-cell EPDM rubber material, the middle thermal insulation main functional layer (120) is made of porous vacuum silicone material, and the outer protective layer (130) is made of high-strength polyimide fiber reinforced composite material. The total thickness of the inner buffer layer (110), the middle thermal insulation main functional layer (120) and the outer protective layer (130) is 20-30 mm.

2. The multilayer composite insulation layer structure with low heat transfer rate according to claim 1, characterized in that: The inner buffer layer (110) is fixedly connected to a first ladder column (111), and there are multiple first ladder columns (111). The bottom surface of the middle heat insulation main functional layer (120) is provided with a first ladder groove (121), and there are multiple first ladder grooves (121). Multiple first ladder columns (111) are embedded in the first ladder grooves (121) and then bonded together by nano-modified adhesive.

3. The multilayer composite insulation layer structure with low heat transfer rate according to claim 1, characterized in that: The bottom surface of the outer protective layer (130) is fixedly connected with a second ladder column (131), and there are multiple second ladder columns (131). The top surface of the middle heat insulation main functional layer (120) is provided with a second ladder groove (122), and there are multiple second ladder grooves (122). Multiple second ladder columns (131) are embedded in the second ladder grooves (122) and then bonded together by nano-modified adhesive.

4. The multilayer composite insulation layer structure with low heat transfer rate according to claim 1, characterized in that: The bottom surface of the inner buffer layer (110) is fixedly connected with a boss (112). There are multiple bosses (112). After the bosses (112) are attached to the surface of the test chamber, they are fixed by adhesive.

5. The multilayer composite insulation layer structure with low heat transfer rate according to claim 1, characterized in that: It also includes an edge sealing mechanism, which includes a straight sealing plate (210) and a corner sealing plate (220); There are four straight sealing plates (210), which are respectively inserted into the four corners of the heat insulation mechanism (100) and the test chamber. There are four corner sealing plates (220), which are respectively inserted into the four sides of the heat insulation mechanism (100) and the test chamber. The two ends of the straight sealing plates (210) are respectively inserted into the ends of the corner sealing plates (220).

6. The multilayer composite insulation layer structure with low heat transfer rate according to claim 5, characterized in that: The corner sealing plate (220) has a second fitting groove (221) at both ends, and a second through hole (222) is provided on the surface of the second fitting groove (221). The straight sealing plate (210) has a first fitting groove (211) on its inner wall, and a first through hole (212) is provided in the middle of the first fitting groove (211). The heat insulation mechanism (100) has a third through hole (230) on its side wall. The first fitting groove (211) and the second fitting groove (221) fit together. The first through hole (212), the second through hole (222) and the third through hole (230) are penetrated by a screw (240), and the screw (240) is threadedly connected to a nut (250).

7. The multilayer composite insulation layer structure with low heat transfer rate according to claim 6, characterized in that: The screw (240) is fitted with a rubber ring (260), the size of which is the same as the size of the first through hole (212), the second through hole (222) and the third through hole (230).

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