Thermal insulation sandwich for a mat

Abstract

This utility model provides a heat-insulating interlayer device for a straw mat, belonging to the technical field of daily necessities. The heat-insulating interlayer device for the straw mat includes an outer shell, an inner layer, a support frame, and a sealing structure. The outer shell is a flat rectangular frame with an internal cavity. The inner layer is located inside the cavity and forms a gap space between it and the inner wall of the outer shell. The support frame is a corrugated plate structure set in the gap space, with the crests and troughs abutting against the inner wall of the outer shell and the outer surface of the inner layer, respectively. The sealing structure includes an L-shaped sealing strip and spaced fasteners for sealing the cavity and fixing the inner layer. The support frame maintains a stable gap space between the inner layer and the outer shell, forming an air insulation layer, which solves the technical problem of unstable heat insulation performance caused by the lack of a stable heat insulation gap space between the straw mat and the outer shell.

Description

Technical Field

[0001] This utility model belongs to the field of daily necessities technology, specifically, it relates to a heat insulation interlayer device for a straw mat. Background Technology

[0002] In the application of straw mats, traditional straw mats typically employ a single-layer straw structure or a simple protective layer directly attached to the outside of the straw layer. When used in environments with significant temperature differences between indoors and outdoors, this structure lacks effective insulation space between the straw layer and the outer protective layer, allowing heat to easily conduct through direct contact, thus limiting the insulation effect of the straw mat. In practical applications, straw mats are commonly used for flooring, wall decoration, or as temporary insulation materials. When the external temperature changes, traditional straw mats, lacking an effective insulation structure, experience rapid internal temperature fluctuations, failing to provide stable insulation. While some existing straw mats have an external protective shell, the straw layer and shell are often tightly fitted or have only irregular, tiny gaps. These gaps can easily disappear during use due to the weight of the straw layer sagging or external pressure, leading to direct contact between the straw layer and the outer shell, creating a thermal bridge effect and significantly reducing insulation performance. Furthermore, while some existing insulation structures incorporate a spacer layer, they lack a stable support mechanism. The spacer layer thickness is uneven and difficult to maintain over a long period, resulting in a significant decrease in insulation performance after a period of use. In summary, existing technologies suffer from the technical problem of unstable insulation performance due to the lack of a stable insulation gap between the straw mat and the outer shell. Utility Model Content

[0003] In view of this, the present invention provides a heat insulation interlayer device for straw mats, which can solve the technical problem of unstable heat insulation performance of straw mats in the prior art.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a heat-insulating interlayer device for a straw mat, comprising an outer shell, an inner layer, a support frame, and a sealing structure. The outer shell is in the shape of a flat rectangular frame, and an internal cavity is provided inside the outer shell. The inner layer is located inside the cavity and forms a gap space between it and the inner wall of the outer shell. The support frame is disposed in the gap space, and multiple support points of the support frame abut against the inner wall of the outer shell and the outer surface of the inner layer, respectively. The sealing structure is disposed at the edge of the outer shell and is used to close the cavity and fix the inner layer. The support frame maintains a preset distance between the inner layer and the inner wall of the outer shell through its support points.

[0006] The technical effects of the heat insulation interlayer device for a straw mat provided by this utility model are as follows: By setting a support frame with multiple support points between the outer shell and the inner layer, a stable gap space is maintained between the inner layer and the inner wall of the outer shell. This gap space forms an effective air insulation layer. The multiple support points of the support frame distribute the weight of the inner layer and prevent it from sagging and deforming. The sealing structure ensures the stability of the gap space by sealing the cavity. This improves the heat insulation performance of the straw mat and allows the device to maintain its heat insulation effect for a long time during use without reducing its performance due to changes in the position of the inner layer.

[0007] Based on the above technical solution, the heat insulation interlayer device for a straw mat body of this utility model can be further improved as follows:

[0008] The thickness of the outer shell is evenly distributed along its circumference, and the four corners of the outer shell have a rounded transition shape.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by uniformly distributing the thickness of the outer shell around the circumference, the overall structural strength of the device is consistent, avoiding deformation problems caused by local weaknesses. The rounded transition shape at the four corners eliminates stress concentration, improves the impact resistance and service life of the outer shell, and at the same time, the rounded transition shape makes the device more aesthetically pleasing and reduces the risk of scratching other items during use, thereby enhancing the overall structural stability.

[0010] Furthermore, the outer contour shape of the embedded layer is adapted to the inner contour shape of the receiving cavity, and the gap width between the embedded layer and the inner wall surface of the receiving cavity is 8mm~15mm.

[0011] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the matching design of the outer contour of the embedded layer with the inner contour of the receiving cavity makes the positioning of the embedded layer in the receiving cavity more accurate. The gap space width of 8mm to 15mm not only ensures the heat insulation effect of the air layer, but also avoids the swaying of the embedded layer caused by excessive space. This size range allows the support frame to effectively play its supporting role, ensuring that the embedded layer can still maintain a stable position when subjected to external forces, thereby maintaining the stability of the heat insulation performance of the device.

[0012] Furthermore, the support frame has a wave-shaped plate structure, with the crests of the support frame abutting the inner wall of the outer shell and the troughs of the support frame abutting the outer surface of the inner layer.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the wave-shaped plate structure of the support frame achieves simultaneous support for the outer shell and the inner layer through the alternating distribution of wave crests and troughs. The wave crests abut against the inner wall of the outer shell to provide a stable fixing point, and the wave troughs abut against the outer surface of the inner layer to form a uniform bearing force. This structure enables the support frame to obtain high structural rigidity with a small amount of material, effectively preventing the displacement and deformation of the inner layer due to its own weight or external forces, and ensuring the uniformity of the gap space.

[0014] Furthermore, the corrugated plate structure of the support frame is arranged around the circumference of the outer shell, and the two ends of the support frame are respectively fixedly connected to the two opposite side walls of the outer shell.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the support frame is arranged around the circumference of the outer shell to form a continuous support structure, so that the inner layer is evenly supported throughout the entire perimeter, avoiding local sagging of the inner layer caused by insufficient local support. The two ends of the support frame are fixedly connected to the opposite side walls of the outer shell, making its stress state more stable and preventing the support frame from shifting or loosening during use. The overall support effect is significantly improved, and the stability of the gap space is maintained during long-term use.

[0016] Furthermore, the sealing structure includes a sealing strip and fasteners. The sealing strip has an L-shaped cross-section, with one side of the sealing strip conforming to the edge of the outer casing and the other side of the sealing strip pressing against the edge portion of the inner layer.

[0017] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the L-shaped cross-section of the sealing strip allows it to simultaneously fit the edge surface of the outer shell and press the edge of the inner layer, forming a two-way sealing effect. The fit of one side to the outer shell ensures that the position of the sealing strip is fixed, while the pressing effect of the other side on the inner layer prevents the edge of the inner layer from lifting and moving. The L-shaped structure allows the deformation of the sealing strip under pressure to enhance the sealing effect and effectively prevent external air from flowing into the gap space and affecting the thermal insulation performance.

[0018] Furthermore, fasteners pass through the sealing strip and are fixed to the outer casing. The fasteners are spaced apart along the length of the outer casing edge, with a spacing of 30mm to 50mm between adjacent fasteners.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the fasteners pass through the sealing strip and are fixed to the outer shell to form a reliable mechanical connection, ensuring that the sealing strip will not fall off during use. The spacing of the fasteners along the length of the outer shell edge makes the sealing pressure evenly distributed. The spacing of 30mm to 50mm not only ensures sufficient sealing strength but also avoids structural complexity caused by too many fasteners. This arrangement allows the sealing structure to adapt to the slight dimensional changes of the outer shell when the temperature changes without losing the sealing effect.

[0020] Furthermore, the outer shell is made of aluminum alloy, the inner layer is woven from straw, and the support frame is made of stainless steel.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the outer shell is made of aluminum alloy, which has good strength and corrosion resistance, and can provide a solid external protection for the device; the inner layer is made of straw, which has natural breathability and flexibility, and is in line with the usage characteristics of straw mats; the support frame is made of stainless steel, which has excellent elasticity and fatigue resistance, and can maintain support force for a long time without plastic deformation. The combination of the three materials achieves comprehensive optimization of structural strength, heat insulation performance and service life.

[0022] Furthermore, the crest portion of the support frame forms a point contact with the inner wall surface of the outer shell, and the trough portion of the support frame forms a line contact with the outer surface of the inner layer.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the point contact state between the peak part of the support frame and the inner wall of the outer shell reduces the heat conduction contact area and reduces the heat transfer from the outer shell to the inner layer through the support frame. The line contact state between the trough part of the support frame and the outer surface of the inner layer provides sufficient support while limiting the heat conduction path. This combination of point contact and line contact ensures that the support frame does not become a significant thermal bridge while performing its structural support function, further improving the overall thermal insulation performance of the device.

[0024] Furthermore, the gaps are filled with an air layer to provide insulation, and the inner layer of straw material has a weaving density of 20 to 35 straw strands per square centimeter.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the air layer filling the gap space utilizes the low thermal conductivity of air to form an effective heat insulation barrier, preventing heat transfer between the outer shell and the inner layer. The weaving density of the inner layer straw material is controlled within the range of 20 to 35 straw fibers per square centimeter, so that the straw layer has both appropriate strength and good air permeability and flexibility. This weaving density, combined with the heat insulation effect of the air layer, enables the device to achieve the best effect in terms of heat preservation and meets the performance requirements of the straw mat in actual use.

[0026] Compared with existing technologies, the beneficial effects of the heat-insulating interlayer device for a straw mat provided by this utility model are as follows: By setting a support frame with a corrugated plate structure between the outer shell and the inner layer, and utilizing the crests and troughs of the support frame to abut against the inner wall of the outer shell and the outer surface of the inner layer respectively, a stable gap space is formed and maintained between the two. The air layer in this gap space provides an effective heat insulation barrier. The support frame is arranged around the circumference of the outer shell and fixedly connected to the side wall of the outer shell, so that the inner layer is uniformly supported throughout the perimeter, preventing positional changes caused by its own weight or external forces.

[0027] The sealing structure employs an L-shaped sealing strip with spaced fasteners to effectively seal the cavity, preventing external airflow from affecting the insulation effect of the gap space, while simultaneously pressing the edge of the inner layer to prevent displacement. The point and line contact between the support frame, outer shell, and inner layer reduces the heat conduction contact area, lowers heat transfer through the support frame, and avoids thermal bridging. The outer shell, inner layer, and support frame are made of aluminum alloy, straw weaving material, and stainless steel, respectively, achieving an optimized combination of structural strength and insulation performance. This invention solves the technical problem of unstable insulation performance caused by the lack of a stable insulation gap space between the straw weaving mat and the outer shell in existing technologies, by using the support frame to create a stable gap space between the outer shell and the inner layer and maintaining the stability of this gap space through the sealing structure. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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.

[0029] Figure 1 A schematic diagram of the overall structure of a heat-insulating interlayer device for a straw mat;

[0030] Figure 2 This is a schematic diagram of the support frame structure;

[0031] Figure 3 This is a partially enlarged schematic diagram of the sealing structure;

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 10. Outer shell; 11. Inner layer; 12. Support frame; 13. Sealing structure; 14. Sealing strip; 15. Fasteners. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0035] like Figures 1-3 The image shows an embodiment of a heat-insulating interlayer device for a straw mat provided by this utility model. In this embodiment, it includes an outer shell 10, an inner layer 11, a support frame 12, and a sealing structure 13. The outer shell is in the shape of a flat rectangular frame, and a receiving cavity is provided inside the outer shell. The inner layer is located inside the receiving cavity and forms a gap space between it and the inner wall surface of the outer shell. The support frame is disposed in the gap space, and multiple support points of the support frame abut against the inner wall surface of the outer shell and the outer surface of the inner layer, respectively. The sealing structure is disposed at the edge of the outer shell and is used to close the receiving cavity and fix the inner layer. The support frame maintains a preset distance between the inner layer and the inner wall surface of the outer shell through its support points.

[0036] In the above technical solution, the thickness of the outer shell is evenly distributed along its circumference, and the four corners of the outer shell have a rounded transition shape.

[0037] Furthermore, in the above technical solution, the outer contour shape of the embedded layer is adapted to the inner contour shape of the receiving cavity, and the gap width between the embedded layer and the inner wall surface of the receiving cavity is 8mm~15mm.

[0038] Furthermore, in the above technical solution, the support frame has a wave-shaped plate structure, with the crest of the support frame abutting the inner wall surface of the outer shell and the trough of the support frame abutting the outer surface of the inner layer.

[0039] Furthermore, in the above technical solution, the wave-shaped plate structure of the support frame is arranged around the circumference of the outer shell, and the two ends of the support frame are respectively fixedly connected to the two opposite side walls of the outer shell.

[0040] Furthermore, in the above technical solution, the sealing structure includes a sealing strip 14 and a fastener 15. The sealing strip has an L-shaped cross-section, one side of the sealing strip is attached to the edge of the outer shell, and the other side of the sealing strip presses against the edge of the inner layer.

[0041] Furthermore, in the above technical solution, the fasteners pass through the sealing strip and are fixed to the outer shell. The fasteners are arranged at intervals along the length direction of the edge of the outer shell, and the distance between two adjacent fasteners is 30mm~50mm.

[0042] Furthermore, in the above technical solution, the outer shell is made of aluminum alloy, the inner layer is woven from straw, and the support frame is made of stainless steel.

[0043] Furthermore, in the above technical solution, the crest portion of the support frame forms a point contact with the inner wall surface of the outer shell, and the trough portion of the support frame forms a line contact with the outer surface of the inner layer.

[0044] Furthermore, in the above technical solution, the gap space is filled with an air layer, which is used to provide heat insulation. The weaving density of the straw material in the inner layer is 20 to 35 straw strands per square centimeter.

[0045] The method of using this utility model is as follows: In use, place the inlay layer inside the receiving cavity of the outer shell, adjust the position of the inlay layer so that its outer contour matches the inner contour of the receiving cavity, ensuring a uniform gap space is formed between the inlay layer and the inner wall surface of the outer shell. Place the support frame within the gap space, so that the crest of the support frame abuts against the inner wall surface of the outer shell and the trough of the support frame abuts against the outer surface of the inlay layer. Fix both ends of the support frame to the opposite side walls of the outer shell by welding. Place the sealing strip at the edge of the outer shell, so that one side of the sealing strip fits against the edge surface of the outer shell and the other side presses against the edge of the inlay layer. Fasteners are passed through the sealing strip and screwed into the threaded holes of the outer shell. All fasteners are installed in sequence at intervals of 30mm to 50mm. Tightening the fasteners makes the sealing strip press against the edge of the inner layer, thus completing the assembly of the entire device. The assembled straw mat insulation interlayer device can be placed in the location where heat insulation is required. The stable gap space between the outer shell and the inner layer forms an air layer that provides an effective heat insulation barrier, preventing heat from being transferred quickly between the outer shell and the inner layer. The support of the support frame ensures that the gap space remains stable during long-term use, and the sealing structure prevents external airflow from affecting the heat insulation effect.

[0046] The following is a specific embodiment 1: A heat-insulating interlayer device is fabricated using a straw-woven mat with dimensions of 600mm × 400mm. The outer shell is made of 2.5mm thick aluminum alloy sheet, which is bent and welded to form a flat rectangular frame structure. The internal cavity of the outer shell has a depth of 20mm, and the radius of the rounded transition at the four corners is 10mm. The inner layer is made of natural rice straw with a weaving density of 28 straw strands per square centimeter. The thickness of the inner layer is 10mm, and its outer contour dimensions are 580mm × 380mm, which matches the inner contour dimensions of the cavity, creating a uniform gap space with a width of 10mm between the inner layer and the inner wall of the outer shell. The support frame is made of 0.6mm thick stainless steel sheet, cold-bent into a corrugated plate structure. The crest height of the corrugation is 10mm, and the spacing between crests is 40mm. The support frame is arranged around the circumference of the outer shell, and both ends are fixed to the opposite sidewalls of the outer shell by argon arc welding. The crests of the support frame form a point contact with the inner wall of the outer shell with a diameter of approximately 1.5mm, and the troughs form a line contact with the outer surface of the inner layer with a width of approximately 2.5mm. The sealing strip is made of silicone rubber with an L-shaped cross-section, with two sides of 10mm and 8mm respectively. The sealing strip is placed at the edge of the outer shell, with one side conforming to the edge of the outer shell and the other side pressing against the edge of the inner layer. M4 stainless steel bolts are used for fasteners, with one fastener every 40mm along the edge of the outer shell. The tightening torque is controlled at 3 Nm to ensure that the sealing strip exerts a uniform pressure on the edge of the inner layer. After assembly, a stable 10mm wide gap space is formed between the outer shell and the inner layer. When the air layer in this gap space is placed at room temperature of 25℃, the temperature of the outer surface of the outer shell only rises to about 35℃ when the temperature of the inner layer rises to 60℃, showing a good heat insulation effect. The supporting role of the support frame keeps the position of the inner layer stable, and the width of the gap space remains consistent in all positions. The sealing structure effectively seals the cavity to prevent external air from flowing. The heat insulation performance of the entire device remains stable during continuous use.

[0047] The following is a specific embodiment 2: Based on embodiment 1, an improvement is made. The corrugated plate structure of the support frame adopts a double-layer arrangement. The crest of the first layer of the support frame abuts against the inner wall of the outer shell, the crest of the second layer abuts against the trough of the first layer, and the trough of the second layer abuts against the outer surface of the inner layer. The crests of the two layers are staggered to form an interlaced support structure. Both the first and second layers of the support frame are made of 0.5mm thick stainless steel plates, with a crest height of 5mm and a crest spacing of 40mm. The double-layer support frame structure makes the heat conduction path between the outer shell and the inner layer more tortuous, further reducing heat transfer through the support frame. Simultaneously, the double-layer interlaced arrangement enhances the support stability of the inner layer, preventing significant displacement even under large external forces. Under the same test conditions after assembly, when the outer surface temperature of the outer shell rises to 60℃, the temperature of the inner layer only rises to about 32℃, further improving the heat insulation effect compared to embodiment 1.

[0048] The following is a specific embodiment 3: Based on embodiment 1, an improvement is made by adding a heat-insulating coating within the gap space. The heat-insulating coating is applied to the inner wall surface of the outer casing and is a ceramic-based heat-insulating coating with a thickness of 0.3mm to 0.5mm. The ceramic-based heat-insulating coating has low thermal conductivity and high reflectivity, which can reflect some heat radiation and further reduce heat transfer from the outer casing to the gap space. The crest of the support frame abuts against the surface of the heat-insulating coating, and the point contact is unaffected by the heat-insulating coating. Under the same test conditions after assembly, when the outer surface temperature of the outer casing rises to 60°C, the inner wall temperature of the outer casing drops to approximately 50°C due to the effect of the heat-insulating coating, and the temperature of the embedded layer only rises to approximately 30°C. The heat insulation effect is significantly improved, and this improved solution is particularly suitable for applications with drastic changes in external ambient temperature.

[0049] Specifically, the principle of this invention is as follows: An effective air insulation layer is formed using a stable gap space. Air has a much lower thermal conductivity than solid materials. When a certain width of gap space is maintained between the outer shell and the inner layer, heat transfer from the outer shell to the inner layer requires convection and radiation through the air layer. The efficiency of these two heat transfer methods is far lower than heat conduction through direct contact with solids, thus significantly reducing the heat transfer rate. The corrugated plate structure of the support frame, through the alternating distribution of crests and troughs, ensures the stability of the inner layer's position while minimizing the contact area between the outer shell and the inner layer. The point and line contact of the support frame restricts the heat conduction path. Even if the outer shell temperature rises, the heat transferred to the inner layer is significantly reduced due to the small contact area and the obstruction of the air layer. The sealing structure's sealing effect prevents external air from entering the gap space, avoiding a decrease in insulation effect caused by enhanced convective heat transfer. The elastic deformation of the L-shaped sealing strip under fastener pressure enhances the sealing effect, ensuring that the air layer within the gap space remains relatively stationary. The support frame is fixedly connected to the side wall of the outer shell at both ends and is arranged around the circumference to form a stable support network. This prevents the inner layer from shifting when subjected to external forces, ensuring the uniformity and stability of the gap space width. This uniform and stable gap space allows the thermal insulation effect of the air layer to remain consistent throughout the entire service life of the device.

[0050] This invention fundamentally solves the problem of thermal bridging caused by direct contact between the straw weaving layer and the outer shell through the synergistic effect of the support frame, sealing structure and gap space, so that the straw weaving mat can maintain stable heat insulation performance in various usage environments.

Claims

1. A heat-insulating interlayer device for a straw mat, characterized in that, The device includes an outer shell, an inner layer, a support frame, and a sealing structure. The outer shell is a flat rectangular frame with an internal cavity. The inner layer is located inside the cavity and forms a gap between it and the inner wall of the outer shell. The support frame is located within the gap, and its multiple support points abut against the inner wall of the outer shell and the outer surface of the inner layer, respectively. The sealing structure is located at the edge of the outer shell and is used to close the cavity and fix the inner layer. The support frame maintains a preset distance between the inner layer and the inner wall of the outer shell through its support points.

2. The heat-insulating interlayer device for a straw mat according to claim 1, characterized in that, The thickness of the outer shell is evenly distributed along its circumference, and the four corners of the outer shell have a rounded transition shape.

3. The heat-insulating interlayer device for a straw mat according to claim 2, characterized in that, The outer contour shape of the embedded layer is adapted to the inner contour shape of the receiving cavity, and the gap width between the embedded layer and the inner wall of the receiving cavity is 8mm~15mm.

4. The heat-insulating interlayer device for a straw mat according to claim 3, characterized in that, The support frame has a wave-shaped plate structure. The crest of the support frame abuts against the inner wall of the outer shell, and the trough of the support frame abuts against the outer surface of the inner layer.

5. The heat-insulating interlayer device for a straw mat according to claim 4, characterized in that, The corrugated plate structure of the support frame is arranged around the circumference of the outer shell, and the two ends of the support frame are fixedly connected to the two opposite side walls of the outer shell.

6. The heat-insulating interlayer device for a straw mat according to claim 5, characterized in that, The sealing structure includes a sealing strip and fasteners. The sealing strip has an L-shaped cross-section. One side of the sealing strip is attached to the edge of the outer casing, and the other side of the sealing strip presses against the edge of the inner layer.

7. The heat-insulating interlayer device for a straw mat according to claim 6, characterized in that, Fasteners pass through the sealing strip and are fixed to the outer casing. The fasteners are arranged at intervals along the length of the outer casing edge, with a spacing of 30mm to 50mm between two adjacent fasteners.

8. The heat-insulating interlayer device for a straw mat according to claim 7, characterized in that, The outer shell is made of aluminum alloy, the inner layer is woven from straw, and the support frame is made of stainless steel.

9. The heat-insulating interlayer device for a straw mat according to claim 8, characterized in that, The crest of the support frame forms a point contact with the inner wall of the outer shell, and the trough of the support frame forms a line contact with the outer surface of the inner layer.

10. The heat-insulating interlayer device for a straw mat according to claim 9, characterized in that, The gap is filled with an air layer, which provides insulation. The inner layer is made of straw with a weaving density of 20 to 35 straw strands per square centimeter.

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