Five-dimensional elastic sound insulation assembly type heat preservation floor heating module and preparation method thereof

Abstract

The invention relates to the technical field of heat preservation floor heating module manufacturing, in particular to a five-dimensional elastic sound insulation assembly type heat preservation floor heating module and a manufacturing method thereof.The floor heating module comprises a bottom elastic sound insulation heat preservation unit, a surrounding sound insulation protection unit and an embedded pipeline fixing heat conduction unit, and the bottom elastic sound insulation heat preservation unit, the surrounding sound insulation protection unit and the embedded pipeline fixing heat conduction unit cooperate to form an integrated structure; the bottom elastic sound-insulation modified polypropylene plate and the surrounding modified polypropylene sound-insulation heat-preservation plates enclose to form a box body, and the pipeline groove cement gypsum-based inorganic plate is embedded in the box body. The preparation method comprises the following steps: drying a modified polypropylene raw material, then carrying out injection molding to form the integrated box body, filling the box body with composite cement gypsum-based slurry, carrying out vibration compaction, and carrying out heat preservation and heat preservation. And after the groove mold is pressed, constant-temperature maintenance is conducted, demolding is conducted, and the five-dimensional elastic sound insulation assembly type heat preservation floor heating module is obtained. The module has excellent elastic sound insulation, heat preservation and uniform heat conduction performance, is prefabricated in a factory and quickly paved on site, can replace vertical sound insulation pieces around a room, avoids edge missing and corner falling of a cement gypsum-based inorganic plate, and is suitable for various building floor heating systems.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of preparation of thermal insulation floor heating modules, and in particular to a five-dimensional elastic sound insulation assembly type thermal insulation floor heating module and a preparation method thereof. BACKGROUND

[0002] In the field of building heating, the floor heating system is widely used in residential, commercial buildings and other scenes due to its uniform heating and high space utilization rate. However, the traditional floor heating module has many technical defects and is difficult to meet the needs of modern buildings. First, the sound insulation and thermal insulation performance synergy is poor. Traditional modules mostly use single materials such as extruded board and polystyrene board as the thermal insulation layer, which has weak sound insulation capacity. The floor heating vibration noise and adjacent room air sound are easily penetrated. Even if a sound insulation layer is added, sound bridges are formed due to the loose combination between layers, and the thermal insulation performance is also attenuated due to the difference in the thermal expansion coefficient of the material. Second, the uniformity of heat conduction and the bearing capacity are unbalanced. The cement-based heat conduction layer has large heat loss and uneven temperature. The addition of a metal heat conduction layer increases the cost and is prone to cracking. The bottom thermal insulation layer has low strength and cannot disperse the load of furniture and personnel activities, which easily causes module deformation, pipe displacement, and affects the stability of heating and system life. At the same time, the on-site construction is complex and the quality is difficult to control. It needs to go through multiple on-site processes such as base leveling, thermal insulation layer laying, pipe fixing, and cement filling. The thermal insulation layer splicing easily leaves gaps, the pipe fixing precision is poor, the cement filling layer needs to be maintained for 7-10 days, and is easily cracked due to environmental influence. Any problem in any link needs to be reworked, which increases the cost and construction period. At the same time, the component protection and adaptability are insufficient. The inorganic bearing layer is easily missing corners on site, and vertical sound insulation sheets need to be additionally pasted around the room, which is complicated and easy to form sound and heat bridges. The pipe fixing structure size is fixed and cannot adapt to different pipe diameters.

[0003] Therefore, there is an urgent need for an integrated floor heating module that integrates elastic sound insulation, efficient thermal insulation, and uniform heat conduction, can be prefabricated in the factory and quickly installed on site, and can protect the components and be flexible and adaptable, to solve the pain points of traditional technology. SUMMARY

[0004] The present application provides a five-dimensional elastic sound insulation assembly type thermal insulation floor heating module and a preparation method thereof, thereby solving the problems of poor sound insulation performance, poor thermal insulation performance, poor heat conduction performance, and low construction efficiency of the floor heating module.

[0005] The first aspect of the present application provides a five-dimensional elastic sound insulation assembly type thermal insulation floor heating module, which is composed of a bottom elastic sound insulation and thermal insulation unit, a surrounding sound insulation protection unit, and an embedded pipe fixing and heat conduction unit. It takes a three-dimensional space structure as the basic framework, superimposes two core functional dimensions of elastic deformation and heat insulation, and forms an integrated module system of three-dimensional structure + two-dimensional function.

[0006] Furthermore, the bottom elastic sound insulation and heat preservation unit is composed of a flexural reinforcement layer, a sound insulation reinforcement layer, and a sound insulation and heat preservation layer. The material is a 27mm thick elastic sound insulation modified polypropylene integrated board. The upper surface of the modified polypropylene integrated board is provided with a 5mm high arc-shaped groove, and the lower surface of the integrated board is provided with a wave pattern. The distance between the peaks and troughs is 5mm, and they are distributed at intervals along the longitudinal and transverse directions. The distance between adjacent peaks in the longitudinal direction is 38mm, and the distance between adjacent peaks in the transverse direction is 34mm.

[0007] It is understood that this embodiment uses a 27mm thick elastic sound-insulating modified polypropylene integrated plate as the bottom unit. The elastic properties of the material itself can absorb vibration energy through deformation, weakening the transmission of solid-borne sound. At the same time, the closed-cell structure of polypropylene can reduce airborne sound penetration, ensuring the foundation for sound insulation and heat preservation. The flexural reinforcement layer enhances the flexural strength of the inorganic plate in the groove, preventing cracking at the groove. The sound insulation reinforcement layer increases the impact sound insulation effect. The 5mm high corrugated pattern on the upper surface and the 5mm gap between the crests and troughs on the lower surface can also disperse the upper load through the three-dimensional shape of the crests and troughs, preventing localized pressure on the module. The deformation and the concave-convex structure formed by the wave pattern can increase the contact area with the embedded cement gypsum-based inorganic board, improve the interfacial bonding force between the two, and prevent interlayer separation. The design of 38mm longitudinal and 34mm transverse wave crest spacing is based on the optimization of the vibration wave propagation law. The wave pattern with a specific spacing can break the continuous propagation path of vibration waves through the sound wave interference effect, further enhancing the sound insulation effect. At the same time, the regular matrix distribution can ensure the uniformity of load distribution and the balance of interface force, avoiding stress concentration caused by uneven local spacing, and ultimately achieving synergistic optimization of sound insulation, load-bearing and interface bonding performance.

[0008] Furthermore, the surrounding sound insulation and protection unit serves as a sound insulation and protection layer, and is made of 15mm thick modified polypropylene sound insulation and heat insulation integrated board. The modified polypropylene sound insulation and heat insulation integrated board and the elastic sound insulation modified polypropylene integrated board of the bottom elastic sound insulation and heat insulation unit are molded together in one piece to form a box structure.

[0009] It is understood that this embodiment of the application uses a one-time molding process to enclose a 15mm thick modified polypropylene sound insulation and heat insulation integrated panel with a bottom elastic sound insulation and heat insulation unit. Utilizing the closed-cell structure of the modified polypropylene material, its closed cells effectively block air convection and heat conduction. Simultaneously, the material's elasticity absorbs some vibration energy, giving the enclosed unit both sound insulation and heat insulation functions. The choice of the same material as the bottom unit ensures that their thermal expansion coefficients and mechanical properties are matched, avoiding long-term delamination problems caused by material differences. Furthermore, the one-time molding process eliminates the traditional splicing... By addressing gaps in the assembly process, a completely sealed enclosure structure is formed, structurally preventing the formation of sound and thermal bridges. This not only prevents airborne sound from penetrating through the seams but also reduces heat loss from the enclosure edges. Simultaneously, the integrated enclosure structure provides a stable wrapping for the internal cement-gypsum-based inorganic board, preventing chipping or breakage of the board due to collisions during transportation and installation. Furthermore, the enclosure structure distributes the upper load to the bottom unit, avoiding localized stress concentration and further enhancing the overall load-bearing stability of the module. Ultimately, this achieves a synergistic effect of enhanced sound insulation and thermal insulation, structural protection, and load distribution.

[0010] Furthermore, the embedded pipe fixing heat conduction unit is located in the heat equalization layer. The heat equalization layer is made of 28mm thick pipe groove cement gypsum-based inorganic board. The pipe groove cement gypsum-based inorganic board is filled in the accommodating space of the box structure. Its lower surface is attached to the upper part of the bottom elastic sound insulation and heat preservation unit. The upper surface is provided with a groove with a depth of 23mm for fixing the underfloor heating pipe. The elastic sound insulation modified polypropylene integrated board directly below the groove is arc-shaped and concave. The width of the arc-shaped concave area is 60mm and the deepest point is 5mm. The position of the groove can be adjusted according to the requirements of underfloor heating pipe laying.

[0011] It is understood that this embodiment uses a 28mm thick cement-gypsum-based inorganic board with pipe grooves as an embedded unit. The cement-gypsum-based material possesses both high compressive strength and good thermal conductivity, enabling it to withstand the upper ground load. Through the corrugated contact between the lower surface and the bottom elastic sound insulation unit, the load is evenly transferred to the bottom box structure, preventing module deformation caused by localized stress concentration. It also allows for rapid heat conduction from the underfloor heating pipes, reducing heat loss. The 23mm deep groove design on the upper surface, based on the principles of pipe fixing mechanics, matches the outer diameter of the underfloor heating pipes, physically preventing pipe displacement due to thermal expansion and contraction or vibration during heating operation. To ensure heating stability, the 60mm wide and 5mm deep arc-shaped recessed structure of the elastic sound-insulating modified polypropylene integrated panel directly below the trench increases the flexural strength of the cement gypsum-based inorganic board. The arc-shaped surface fits snugly against the bottom of the pipe, increasing the contact area between the pipe and the module, improving heat transfer efficiency to the bottom and surrounding areas, and preventing localized overheating. Simultaneously, the arc-shaped structure absorbs pipe vibration energy through deformation, further weakening solid-borne sound transmission. Combined with the adjustable trench position, it can adapt to the underfloor heating pipe installation needs of different apartment types, achieving a synergy between functional practicality and structural flexibility. Ultimately, it achieves a comprehensive effect of uniform load transfer, efficient heat conduction, stable pipe fixation, and enhanced sound insulation.

[0012] The second aspect of this application provides a method for preparing a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module, comprising the following steps:

[0013] (1) Modified polypropylene raw materials are selected and dried. The integrated box structure is prepared by supercritical carbon dioxide foaming injection molding process. The mold is pre-set with a 27mm thick molding area at the bottom and a 15mm thick enclosure area around the sides. The bottom is set with concave and convex textures matching the corrugated pattern. After the raw material is melted, supercritical carbon dioxide is injected. After it is fully diffused and dissolved to form a homogeneous system, the molding temperature is controlled at 140-180℃ and the pressure is 5-10MPa. After being injected into the mold, foaming is induced by pressure reduction. The first foaming is 15 times and the second foaming is 20-60 times, so that the bottom elastic sound insulation board and the surrounding enclosure board are foamed and formed in one step, resulting in a box structure with specific corrugated patterns and accommodating space.

[0014] It is understood that, in this embodiment, the modified polypropylene raw material is dried to remove moisture, thus preventing water vapor from interfering with foaming during melting and ensuring process stability. After the modified polypropylene melts, supercritical carbon dioxide, with its high diffusivity and solubility, quickly penetrates into the gaps between the molten polymer molecular chains, forming a thermodynamically stable homogeneous system. The molding temperature of 140-180℃ maintains the melt flowability of the polypropylene, ensuring it can fill the mold, and also adapts to the dissolved state of carbon dioxide, preventing premature gas escape due to excessively high temperatures. The molding pressure of 5-10MPa suppresses carbon dioxide in the homogeneous system. The premature precipitation of carbon dioxide reserves sufficient gas for foaming. At the same time, the molten material containing the homogeneous system is injected into the mold with the pre-designed structure. The thickness area and the concave and convex texture of the mold provide the shaping boundary for the shape and corrugation of the box. After injection, the pressure reduction operation breaks the homogeneous equilibrium, the solubility of carbon dioxide drops sharply and precipitates to form bubble nuclei. The bubble nuclei grow under the constraint of the mold, pushing the molten material to fill the mold, so that the bottom and the enclosed area are formed simultaneously. At the same time, the bubbles form uniform micropores inside the polypropylene, giving the board elasticity and sound insulation performance. Finally, as the polypropylene cools and solidifies, the bubble shape and structure are fixed, and an integrated box with corrugations and accommodating space is obtained in one step.

[0015] (2) Transfer the box structure to the underfloor heating module molding workshop, and fill the accommodating space of the box structure with cement-gypsum based slurry made of ordinary silicate cement, gypsum powder, inorganic filler and heat-averaging auxiliary medium in a mass ratio of 80:(10-20):(20-25):(5-8). During the filling process, a vibration compaction process is adopted with a vibration frequency of 50-80Hz. The filling amount is sufficient to form a 28mm thick pipe trench cement-gypsum based inorganic board after molding. The groove mold is pressed onto the surface of the cement-gypsum-based slurry, forming a groove on the surface of the slurry that fits the underfloor heating pipes. Constant temperature curing is adopted, with a curing temperature of 20-25℃, relative humidity of 50-60%, and a curing time of 48-72 hours. After curing, the module strength is tested. When the compressive strength of the cement-gypsum-based inorganic board in the pipe groove is ≥5MPa and there is no cracking or falling off at the joints of the box structure, the strength is judged to meet the standard. The groove mold is then removed, and a qualified five-dimensional elastic sound insulation prefabricated thermal insulation underfloor heating module is obtained.

[0016] It is understood that in this embodiment, gypsum powder and ordinary silicate cement are used as the core cementitious components. After being mixed with inorganic fillers and heat-relieving auxiliary media in a specific mass ratio to form a cement-gypsum based slurry, a 50-80Hz vibration compaction process is used during the filling stage. This mechanical vibration removes air from the slurry and reduces porosity, allowing the slurry to tightly fill the box's accommodating space and fully conform to the bottom corrugated structure. Simultaneously, the pressing effect of the pre-set groove mold can shape the grooves to fit the underfloor heating pipes before the slurry hardens. The constant temperature curing environment can precisely control the hydration reaction rate of the cementitious materials, ensuring that the gypsum powder fully generates calcium sulfate dihydrate crystals and ordinary silicate cement. Salt cement forms hydrated calcium silicate gel, and the two work together to construct a rigid skeleton with sufficient strength, while avoiding insufficient hydration or excessive shrinkage due to abnormal temperature and humidity. Inorganic fillers fill the gaps in the skeleton to reduce shrinkage and increase density, while heat-equalizing auxiliary media are evenly dispersed to form heat conduction pathways. Finally, when the cement gypsum-based inorganic board in the pipe trench reaches a compressive strength of ≥5MPa due to the completion of the hydration reaction, and there is no cracking or falling off at the joints of the box structure due to stress imbalance, the inorganic board and the box are integrated and stablely combined, ensuring that the module has the performance of pipe fixing, heat insulation and heat conduction, and structural strength, forming a qualified five-dimensional elastic sound insulation prefabricated thermal insulation floor heating module.

[0017] Furthermore, the drying process in step (1) is carried out at a temperature of 80-100℃ for 2-3 hours.

[0018] Furthermore, in step (1), the convex and concave textures matching the wave pattern are specifically set as follows: the height of the raised part of the texture is 5mm, the depth of the concave part is 5mm, and the transition surface between the raised and concave parts is a smooth arc; along the longitudinal direction of the bottom of the mold, the distance between the vertices of adjacent texture convex parts is 38mm, and the vertices of the convex parts are evenly distributed in a straight line with a deviation within ±0.5mm; along the transverse direction of the bottom of the mold, the distance between the vertices of adjacent texture convex parts is 34mm, and they are also evenly distributed in a straight line with a deviation within ±0.5mm; the longitudinal and transverse convex and concave textures intersect to form a matrix distribution; the intersection of the vertices of the longitudinal and transverse convex parts is a complete convex unit; the space between adjacent convex units is a concave unit; and the bottom of the concave unit is a smooth plane.

[0019] It is understood that by setting the height of the protrusions and the depth of the recesses to 5mm, this embodiment of the application ensures that the required wavy height and the spacing between the crests and troughs are accurately reproduced after the modified polypropylene molten raw material is filled. The smooth arc transition surface can avoid cracks caused by local stress concentration during raw material molding, while reducing the sharp edges of the wavy texture and preventing interface damage when bonded to the cement gypsum-based inorganic board. The longitudinal 38mm and transverse 34mm spacing between the protrusion apexes and the ±0.5mm distribution deviation control, based on structural mechanics and the principle of acoustic interference, ensures that the regular matrix distribution allows for the formation of the wavy texture in the product. The uniform stress-bearing support points can distribute stress to the entire bottom unit when bearing the upper load, avoiding localized pressure deformation. The concave-convex structure with specific spacing can break the continuous propagation path of vibration waves, enhancing the sound insulation effect. The bottom of the recessed unit is designed as a smooth plane, which can ensure uniform stress at the bottom of the mold cavity and avoid uneven material filling caused by the irregular shape of the recessed area. At the same time, it makes the trough area of ​​the product's wavy texture flat, providing a stable contact surface for tight bonding with the cement gypsum-based inorganic board, improving the interlayer bonding force. Finally, through the precise design of the mold texture, the product's structural dimensional accuracy, mechanical properties, and functional effects are synergistically guaranteed.

[0020] Furthermore, the specific structure of the pre-set groove mold in step (2) is as follows: the lower surface of the mold is provided with a raised groove forming strip, the height of the forming strip is 23mm, the width of the forming strip is adapted to the outer diameter of the underfloor heating pipe, and the mold is provided with an inwardly recessed arc forming area directly below the groove forming strip. The horizontal width of the arc forming area is 60mm, the maximum recessed depth of the arc area is 5mm, and the arc surface transition is smooth. The overall size of the mold is adapted to the accommodating space of the box structure, ensuring that it can accurately cover the upper surface of the cement gypsum-based slurry during pressing, and press and form the pipe groove and the lower arc-shaped recessed structure that meet the requirements in one go. At the same time, the edge of the mold is provided with a positioning buckle, which can accurately connect with the edge of the box structure.

[0021] It is understood that, in this embodiment of the application, a 23mm high groove forming strip is provided on the lower surface of the pre-set groove mold, with a width adapted to the outer diameter of the underfloor heating pipe. Pressure is applied to the uncured cement-gypsum-based slurry by the raised forming strip, allowing for the one-time pressing of a pipe fixing groove with matching depth and size. This ensures the underfloor heating pipe can be securely embedded and is not easily displaced. A smooth arc-shaped forming area, 60mm wide and 5mm deep, is provided directly below the forming strip. The arc-shaped recess allows the corresponding area of ​​the cement-gypsum-based slurry to precisely fit with the arc-shaped recess of the bottom modified polypropylene box, increasing... The contact area between the pipe and the module is increased to improve heat conduction efficiency, and the arc transition disperses the vibration energy of the pipe and enhances the sound insulation effect. The overall size of the mold is adapted to the housing space and the edge is set with positioning buckles. The adapted size ensures that the mold can fully cover the surface of the slurry and avoid structural defects caused by local pressure leakage. The positioning buckles can accurately connect and fix the mold and the housing to prevent the mold from shifting during the pressing process and causing the groove position deviation. Finally, through the targeted design of the mold structure, the precise forming of the pipe groove and the arc concavity, the functional adaptation and the stability of the pressing process are achieved.

[0022] Furthermore, in step (2), the inorganic filler is any one of heavy calcium carbonate, quartz sand, or talc.

[0023] Furthermore, in step (2), the heat-generating auxiliary medium is any one of alumina powder, boron nitride powder, epoxy resin, or water.

[0024] Therefore, the present invention has the following beneficial effects:

[0025] 1. This invention utilizes a bottom elastic sound insulation and heat preservation unit made of an elastic sound insulation modified polypropylene integrated panel. This panel absorbs vibration energy through deformation to weaken solid-borne sound transmission. The closed-cell structure of the polypropylene reduces airborne sound penetration, and the wavy texture on the upper surface, with its matrix-like pattern at specific intervals, breaks the continuous propagation path of vibration waves through sound wave interference. Simultaneously, it increases the contact area with the embedded cement gypsum-based inorganic board to prevent sound bridges caused by interlayer voids. The surrounding sound insulation and protection unit is also made of modified polypropylene sound insulation and heat preservation integrated panel, which, together with the bottom elastic sound insulation and heat preservation unit, forms a box structure. This not only blocks airborne sound and heat through the modified polypropylene closed-cell structure but also eliminates traditional splicing gaps to prevent sound bridge formation. Furthermore, it encloses the internal cement gypsum-based inorganic board to prevent gaps caused by chipped edges and corners, thus preventing sound insulation failure. In the embedded pipe-fixed heat-conducting unit, the elastic sound insulation modified polypropylene integrated panel directly below the groove has an arc-shaped recess. This arc-shaped structure allows for deformation... The system absorbs the vibration energy of the underfloor heating pipes to weaken solid-borne sound transmission. Meanwhile, the pre-designed grooves formed by the mold ensure the pipes are firmly fixed, preventing vibration noise caused by pipe loosening. Furthermore, the modified polypropylene raw material is dried at 80-100℃ for 2-3 hours, and the molding temperature is controlled at 140-180℃ with a molding pressure of 5-10MPa to ensure a dense, pore-free box structure, preventing pores from becoming sound transmission channels. The vibration compaction process ensures that the cement-gypsum-based slurry densely fills the gaps in the box's corrugations, further eliminating interlayer voids and sound bridges. Simultaneously, ordinary silicate cement and gypsum work together to form a dense, rigid skeleton, reducing pores to weaken airborne sound transmission and enhancing the interface between the inorganic board and other units, preventing sound bridges. It also forms a rigid-flexible composite system with flexible units, doubly dissipating sound energy and optimizing the overall sound insulation effect. Ultimately, through the synergy of each unit's structural design and process control, the overall sound insulation performance of the underfloor heating module is significantly improved.

[0026] 2. This invention utilizes a bottom elastic sound insulation and heat preservation unit made of a single piece of elastic sound-insulating modified polypropylene. Its closed-cell structure effectively blocks air convection and heat conduction, reducing heat loss through the bottom unit. The surrounding sound insulation and protection unit is also a single piece of modified polypropylene sound insulation and heat preservation panel, molded together with the bottom unit to form a sealed box structure. The closed-cell characteristics of modified polypropylene prevent heat transfer through the edges and eliminate traditional seams to avoid thermal bridges, further reducing heat loss from the module edges. Simultaneously, the modified polypropylene raw material is dried at 80-100℃ for 2-3 hours, then injection molded at a molding temperature of 140-180℃ and a molding pressure of 5-10MPa, ensuring a dense, pore-free box structure and preventing heat loss due to air convection caused by pores. Furthermore, ordinary silica... The synergistic effect of salt cement and gypsum in forming a dense structure reduces pores and air convection, minimizing heat loss and enhancing the sealing of the interface between the cement-gypsum-based inorganic board and the housing unit. This prevents the formation of heat leakage channels. Furthermore, the good stability of the hydration products helps maintain the long-term integrity of the insulation structure, contributing to the long-term heat retention of the module and optimizing the insulation effect. At the same time, when filling the housing space with cement-gypsum-based slurry, a vibration compaction process is used to ensure that the slurry tightly fills the gaps between the bottom corrugations, eliminating air gaps formed by interlayer voids and reducing heat loss caused by air conduction. Constant temperature curing ensures that the cement-gypsum-based inorganic board is densely solidified, preventing heat leakage caused by cracks due to improper curing. Through the synergy of the housing sealing structure, the closed-cell characteristics of the materials, and the process guarantee, the insulation performance of the underfloor heating module is significantly improved.

[0027] 3. This invention utilizes a cement-gypsum-based inorganic board to fix the heat-conducting unit within the embedded pipes. The cement-gypsum-based material itself has excellent thermal conductivity, enabling rapid conduction of heat released from the underfloor heating pipes. Ordinary silicate cement and a heat-averaging auxiliary medium are added to the cement-gypsum-based slurry in a specific ratio. The dense structure formed by the hydration of the ordinary silicate cement reduces porosity, facilitating heat conduction and enhancing the bond between the cement-gypsum-based inorganic board and the heat-averaging auxiliary medium. This helps to evenly disperse the additives, forming a continuous heat-conducting pathway, while simultaneously strengthening the interface between the board and the housing, reducing heat transfer resistance. Furthermore, the heat-averaging auxiliary medium constructs an efficient heat-conducting pathway within the cement-gypsum-based inorganic board, reducing thermal resistance and improving overall heat conduction efficiency. The cement in the pipe trench... The gypsum-based inorganic board has grooves on its upper surface, and the elastic sound-insulating modified polypropylene integrated board directly below it is concave in an arc shape. The arc structure can increase the contact area between the pipe and the module, so that heat can be fully transferred from the pipe to the cement gypsum-based inorganic board and the bottom unit, reducing local heat accumulation. At the same time, when filling the housing space with cement gypsum-based slurry, a vibration compaction process is used to remove air bubbles in the slurry and make it tightly fill the gaps between the bottom corrugations, preventing air bubbles from forming a heat insulation layer that hinders heat conduction. Meanwhile, constant temperature curing at 20-25℃ and relative humidity of 50-60% ensures that the cement gypsum-based inorganic board is dense and solidified, reducing heat loss caused by loose structure, thereby significantly improving the thermal conductivity of the underfloor heating module.

[0028] 4. This invention utilizes an integrated structure comprised of a bottom elastic sound insulation and heat preservation unit, four surrounding sound insulation and protection units, and an embedded pipe fixing and heat-conducting unit. After factory prefabrication, it allows for rapid on-site installation, eliminating the need for multiple on-site processes in traditional underfloor heating systems, such as base leveling, insulation layer laying, pipe fixing, and cement filling. This significantly shortens the construction cycle. The four surrounding sound insulation and protection units and the bottom elastic sound insulation and heat preservation unit are molded together in one piece to form a box structure, eliminating the need for on-site insulation layer splicing and avoiding the tedious process of treating splicing gaps. Simultaneously, the integrated box structure protects the internal cement-gypsum-based inorganic board, reducing transportation and installation costs. The process avoids rework caused by chipped or broken edges of the inorganic board. The upper surface of the embedded pipe fixing heat-conducting unit has adjustable grooves that can directly adapt to the requirements of underfloor heating pipe laying, eliminating the need for on-site cutting or additional fasteners. The regular grooves formed by the pre-set groove mold ensure accurate pipe laying and reduce on-site adjustment time. The manufacturing process adopts factory production, and processes such as injection molding, vibration compaction, and constant temperature curing ensure stable and controllable module quality, avoiding quality fluctuations and rework caused by environmental factors during on-site construction. The curing time is only 48-72 hours and is completed in the factory without occupying on-site construction time, thus significantly improving construction efficiency.

[0029] 5. The core materials used in the modular construction of this invention are all environmentally friendly. The modified polypropylene used in the bottom and surrounding units releases no volatile organic compounds and is recyclable, reducing the pollution of the environment by waste materials. The cement-gypsum-based slurry of the embedded unit uses ordinary silicate cement as the main raw material, which is a green and environmentally friendly material. Heavy calcium carbonate, quartz sand, and talc are all natural inorganic minerals, and alumina powder and boron nitride powder are all non-toxic inorganic non-metallic materials. They are odorless and do not release any toxic or harmful substances, meeting indoor environmental safety standards. This avoids the environmental hazards that may be caused by traditional organic insulation materials containing flame retardants and other additives. In terms of the manufacturing process, there is no wastewater or exhaust gas emission during the drying and injection molding of the modified polypropylene raw materials. The vibration compaction and constant temperature curing of the cement-gypsum-based slurry do not require the use of chemical curing agents or adhesives, reducing chemical pollution. At the same time, factory prefabrication allows for precise control of raw material usage, reducing waste of scrap materials and resource consumption. Through the synergy of environmentally friendly material selection and clean production processes, the environmental friendliness of the module throughout its entire life cycle is improved. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0031] Figure 1 The image shows a bottom view of a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module, provided in accordance with an embodiment of this application.

[0032] Figure 2 This is a side view of a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module, provided according to an embodiment of this application.

[0033] Figure 3 This is a front view of a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module, provided according to an embodiment of this application. Detailed Implementation

[0034] The technical solution of the present invention is illustrated below through specific examples. It should be understood that the one or more method steps mentioned in the present invention do not preclude the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps; it should also be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless otherwise stated, the numbering of each method step is merely a convenient tool for identifying each method step, and not for limiting the order of the method steps or defining the scope of the present invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the present invention.

[0035] To better understand the above technical solutions, exemplary embodiments of the present invention are described in more detail below. While exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the invention to those skilled in the art.

[0036] The modified polypropylene used in this application's embodiments is sourced from Wuxi Huitong Lightweight Materials Co., Ltd.; the ordinary silicate cement is sourced from Tangshan Jidong Cement Co., Ltd.; the gypsum powder is sourced from Shandong Xinfa Group; the heavy calcium carbonate is sourced from Haicheng City Pailou Town Shouxin Mineral Products Processing Plant; the quartz sand is sourced from Shijiazhuang Shuanglian Chemical Co., Ltd.; the talc powder is sourced from Haicheng Jinchang Talc Powder Co., Ltd.; the alumina powder is sourced from Shanxi Aluminum Plant; and the boron nitride powder is sourced from Inner Mongolia Hengkete Tao New Materials Co., Ltd.

[0037] The following description, with reference to the accompanying drawings, illustrates an embodiment of a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module and its preparation method. Addressing the issues of poor sound insulation and thermal insulation performance of underfloor heating modules mentioned in the background art, this application provides a method for preparing a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module. This method utilizes an elastic sound-insulating modified polypropylene integrated board as the bottom elastic sound-insulating and thermal insulation unit. Through its own elastic deformation, it absorbs vibration energy to weaken solid-borne sound transmission. Its closed-cell structure reduces airborne sound penetration and blocks air convection and heat conduction. Simultaneously, the high-wave texture on the upper surface breaks the continuous propagation path of vibration waves through sound wave interference, and also increases the... The embedded cement-gypsum-based inorganic board has a large contact area to prevent sound bridges caused by interlayer voids. The modified polypropylene sound insulation and thermal insulation integrated panel serves as a four-sided sound insulation and protection unit. It is molded together with the bottom unit to form a sealed box, using a closed-cell structure to block airborne sound and heat transfer, eliminating traditional splicing gaps to block sound and thermal bridges. It also wraps the internal cement-gypsum-based inorganic board to prevent gaps caused by chipped edges. At the same time, there is no need to splice the insulation layer on site, reducing cumbersome procedures and rework. The cement-gypsum-based inorganic board in the pipe trench has an embedded pipe fixing and heat-conducting unit. It can quickly conduct heat from underfloor heating pipes. The dense structure formed after constant temperature curing can stably bear the upper load, preventing module deformation from affecting the heat conduction path. During preparation, the modified polypropylene raw material undergoes drying and pressure injection molding to ensure a dense, non-porous box structure, preventing pores from becoming sound transmission channels or causing air convection heat loss. Furthermore, it is environmentally friendly because it releases no volatile organic compounds and is recyclable. In the cement-gypsum-based slurry, ordinary silicate cement and gypsum form a dense structure, reducing pores to weaken sound energy transmission and reduce heat loss. The heat-equalizing auxiliary medium helps form a heat conduction path and enhances interfacial bonding, preventing sound bridges and heat leakage. Inorganic fillers optimize the slurry density, reducing pores that hinder heat conduction. The heat-equalizing auxiliary medium constructs efficient heat conduction paths to reduce thermal resistance. Simultaneously, the vibration compaction process removes air bubbles from the slurry, ensuring it tightly fills the gaps in the bottom corrugations, eliminating interlayer voids, sound bridges, and air gaps. Constant temperature curing ensures the cement-gypsum-based inorganic board is densely cured, preventing cracks that could lead to heat leakage or sound insulation failure. Furthermore, the curing process requires no chemical hardeners, reducing pollution. Therefore, it solves the problems of poor sound insulation, poor thermal insulation, poor heat conduction, and low construction efficiency associated with underfloor heating modules.

[0038] The following describes a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module and its preparation method according to an embodiment of this application, with reference to the accompanying drawings. The method includes the following steps:

[0039] In step S101, modified polypropylene raw materials are selected and dried. Then, an integrated box structure is prepared by supercritical carbon dioxide foaming injection molding process. The mold is pre-set with a 27mm thick molding area at the bottom and a 15mm thick enclosure area around the sides. The bottom is provided with concave and convex textures that match the corrugated pattern. After the raw material is melted, supercritical carbon dioxide is injected. After it is fully diffused and dissolved to form a homogeneous system, the molding temperature is controlled at 140-180℃ and the pressure is 5-10MPa. After being injected into the mold, foaming is induced by depressurization. The first foaming is 15 times and the second foaming is 20-60 times, so that the bottom elastic sound insulation board and the surrounding enclosure board are foamed and formed in one step, resulting in a box structure with specific corrugated patterns and accommodating space.

[0040] Furthermore, the drying process is carried out at a temperature of 80-100℃ for 2-3 hours. The specific design of the raised and recessed textures matching the wave pattern is as follows: the height of the raised part of the texture is 5mm, the depth of the recessed part is 5mm, and the transition surface between the raised and recessed parts is a smooth arc. Along the longitudinal direction of the bottom of the mold, the distance between the apexes of adjacent raised textures is 38mm, and the apexes of the raised textures are evenly distributed in a straight line with a deviation within ±0.5mm. Along the transverse direction of the bottom of the mold, the distance between the apexes of adjacent raised textures is 34mm, which are also evenly distributed in a straight line with a deviation within ±0.5mm. The longitudinal and transverse raised and recessed textures intersect to form a matrix distribution. The intersection of the apexes of the longitudinal and transverse raised textures is a complete raised unit, and the space between adjacent raised units is a recessed unit. The bottom of the recessed unit is a smooth plane.

[0041] It is understood that, in this embodiment, the modified polypropylene raw material is dried to remove moisture, thus preventing water vapor from interfering with foaming during melting and ensuring process stability. After the modified polypropylene melts, supercritical carbon dioxide, with its high diffusivity and solubility, quickly penetrates into the gaps between the molten polymer molecular chains, forming a thermodynamically stable homogeneous system. The molding temperature of 140-180℃ maintains the melt flowability of the polypropylene, ensuring it can fill the mold, and also adapts to the dissolved state of carbon dioxide, preventing premature gas escape due to excessively high temperatures. The molding pressure of 5-10MPa suppresses carbon dioxide in the homogeneous system. The premature precipitation of carbon dioxide reserves sufficient gas for foaming. At the same time, the molten material containing the homogeneous system is injected into the mold with the pre-designed structure. The thickness area and the concave and convex texture of the mold provide the shaping boundary for the shape and corrugation of the box. After injection, the pressure reduction operation breaks the homogeneous equilibrium, the solubility of carbon dioxide drops sharply and precipitates to form bubble nuclei. The bubble nuclei grow under the constraint of the mold, pushing the molten material to fill the mold, so that the bottom and the enclosed area are formed simultaneously. At the same time, the bubbles form uniform micropores inside the polypropylene, giving the board elasticity and sound insulation performance. Finally, as the polypropylene cools and solidifies, the bubble shape and structure are fixed, and an integrated box with corrugations and accommodating space is obtained in one step.

[0042] Specifically, modified polypropylene raw materials are selected and placed in a drying device to remove moisture, preventing water vapor from affecting the foaming effect during melting. After drying, the raw material is fed into the injection molding machine barrel, where it is heated to melt into a fluid state. Then, supercritical carbon dioxide is injected into the molten modified polypropylene fluid, and the internal environment of the injection molding machine is controlled to ensure full contact between the two. Once the supercritical carbon dioxide has completely diffused and dissolved in the molten polypropylene, forming a uniform and stable homogeneous system, the injection molding machine molding parameters are set, with the temperature adjusted to 140-180℃ and the pressure maintained at 5-10MPa. The molten polypropylene fluid containing the homogeneous system is then injected into a mold with a pre-designed structure. The mold has a pre-designed bottom molding area and a surrounding enclosure area. The bottom molding area has a textured surface that matches the wave pattern. After injection, the pressure inside the mold is reduced by the injection molding machine control system. The sudden pressure drop induces the precipitation of supercritical carbon dioxide in the homogeneous system to form bubbles. The bubbles gradually grow under the constraint of the mold space, pushing the molten polypropylene fluid to fill all areas of the mold and conform to the textured surface. After the molten polypropylene cools and solidifies, the bubble shape and the mold structure are simultaneously fixed. Finally, the mold is opened and the product is taken out, resulting in an integrated box structure with a specific wave pattern at the bottom, an accommodating space, and a bottom elastic sound insulation plate and a surrounding enclosure plate formed in one piece.

[0043] In step S102, the box structure is transferred to the underfloor heating module molding workshop. A cement-gypsum-based slurry, made by mixing ordinary silicate cement, gypsum powder, inorganic fillers, and heat-averaging auxiliary media in a mass ratio of 80:(10-20):(20-25):(5-8), is filled into the accommodating space of the box structure. Vibration compaction is used during filling, with a vibration frequency of 50-80Hz. The filling amount is sufficient to form a 28mm thick cement-gypsum-based inorganic board for pipe trenches after molding. A groove mold is pressed onto the surface of the cement-gypsum-based slurry to form a groove suitable for the underfloor heating pipes. Constant temperature curing is adopted, with a curing temperature of 20-25℃, relative humidity of 50-60%, and a curing time of 48-72 hours. After curing, the module strength is tested. When the compressive strength of the cement-gypsum-based inorganic board in the pipe groove is ≥5MPa and there is no cracking or falling off at the joints of the box structure, the strength is judged to meet the standard. The groove mold is then removed to obtain a qualified five-dimensional elastic sound insulation prefabricated thermal insulation underfloor heating module.

[0044] Furthermore, the specific structure of the pre-set groove mold is as follows: The lower surface of the mold is provided with a raised groove forming strip, the height of which is 23mm. The width of the forming strip is adapted to the outer diameter of the underfloor heating pipe. Directly below the groove forming strip, the mold is provided with an inwardly recessed arc forming area, the horizontal width of which is 60mm and the maximum recess depth of which is 5mm. The arc surface transition is smooth. The overall size of the mold is adapted to the accommodating space of the box structure, ensuring that it can accurately cover the upper surface of the cement gypsum-based slurry during pressing, and press and form the required pipe groove and the lower arc-shaped recessed structure in one go. At the same time, the edge of the mold is provided with positioning buckles, which can accurately connect with the edge of the box structure. The inorganic filler is any one of heavy calcium carbonate, quartz sand, and talc powder. The heat-equalizing auxiliary medium is any one of alumina powder, boron nitride powder, epoxy resin, and water.

[0045] It is understood that in this embodiment, gypsum powder and ordinary silicate cement are used as the core cementitious components. After being mixed with inorganic fillers and heat-relieving auxiliary media in a specific mass ratio to form a cement-gypsum based slurry, a 50-80Hz vibration compaction process is used during the filling stage. This mechanical vibration removes air from the slurry and reduces porosity, allowing the slurry to tightly fill the box's accommodating space and fully conform to the bottom corrugated structure. Simultaneously, the pressing effect of the pre-set groove mold can shape the grooves to fit the underfloor heating pipes before the slurry hardens. The constant temperature curing environment can precisely control the hydration reaction rate of the cementitious materials, ensuring that the gypsum powder fully generates calcium sulfate dihydrate crystals and ordinary silicate cement. Salt cement forms hydrated calcium silicate gel, and the two work together to construct a rigid skeleton with sufficient strength, while avoiding insufficient hydration or excessive shrinkage due to abnormal temperature and humidity. Inorganic fillers fill the gaps in the skeleton to reduce shrinkage and increase density, while heat-equalizing auxiliary media are evenly dispersed to form heat conduction pathways. Finally, when the cement gypsum-based inorganic board in the pipe trench reaches a compressive strength of ≥5MPa due to the completion of the hydration reaction, and there is no cracking or falling off at the joints of the box structure due to stress imbalance, the inorganic board and the box are integrated and stablely combined, ensuring that the module has the performance of pipe fixing, heat insulation and heat conduction, and structural strength, forming a qualified five-dimensional elastic sound insulation prefabricated thermal insulation floor heating module.

[0046] Specifically, the completed integrated box structure is transferred from the injection molding workshop to the dedicated molding workshop for underfloor heating modules, ensuring no collision damage during the transfer. Then, gypsum powder, ordinary silicate cement, inorganic fillers, and heat-relieving auxiliary media are mixed and stirred evenly in a mass ratio of 80:(10-20):(20-25):(5-8) to prepare a cement-gypsum-based slurry with good fluidity and plasticity. Subsequently, the prepared cement-gypsum-based slurry is slowly injected into the internal space of the box structure. During the filling process, a vibration compaction device is simultaneously activated, with the vibration frequency controlled at 50-80Hz. Mechanical vibration ensures the slurry fully fills every corner of the space, especially ensuring a tight fit with the corrugated gaps of the bottom elastic sound insulation unit, while simultaneously removing air bubbles trapped in the slurry. The amount of slurry filled is strictly controlled to ensure a 28mm thick pipe trench cement-gypsum-based inorganic board is formed after molding. After the slurry filling and vibration compaction are completed, a pre-set trench mold is taken. The lower surface of the mold has 2... A 3mm high groove forming strip with a width adapted to the outer diameter of the underfloor heating pipes is used. A smooth, curved forming area, 60mm wide and 5mm deep, is positioned directly below the forming strip. The mold edge has positioning clips, which precisely align and fix the mold to the edge of the box structure. Even pressure is then applied to the mold to press it onto the surface of the cement-gypsum-based slurry, imprinting the grooves and the curved structure below the underfloor heating pipes onto the slurry surface. Afterward, the box structure with the mold pressed is transferred to a constant temperature curing chamber, where the curing temperature is set to 20-25 degrees Celsius. At ℃ and relative humidity of 50-60%, the cement-gypsum-based slurry is continuously cured for 48-72 hours to ensure full curing and shaping. After curing, the compressive strength of the cement-gypsum-based inorganic board in the pipe trench is tested using strength testing equipment. At the same time, the joints of the box structure are checked for cracks, detachment, or other problems. Once the test confirms that the compressive strength of the inorganic board is ≥5MPa and the box structure is intact, the module strength is deemed to meet the standard. Finally, the pre-set trench mold is carefully removed to obtain a qualified five-dimensional elastic sound insulation prefabricated thermal insulation floor heating module.

[0047] This application provides a method for preparing a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module. It uses an elastic sound-insulating modified polypropylene integrated board as the bottom elastic sound-insulating thermal insulation unit. Through its own elastic deformation, it absorbs vibration energy to weaken solid-borne sound transmission. Its closed-cell structure reduces airborne sound penetration and blocks air convection and heat conduction. Simultaneously, the high-wave texture on the upper surface breaks the continuous propagation path of vibration waves through sound wave interference, and also increases the contact area with the embedded cement gypsum-based inorganic board to avoid interlayer voids forming sound bridges. The modified polypropylene sound-insulating thermal insulation integrated board serves as a four-sided enclosed sound insulation protection unit. It forms a sealed box with the bottom unit in one molding process, using the closed-cell structure to block airborne sound and heat transmission, eliminating traditional splicing gaps to block sound and thermal bridges. It also wraps the internal cement gypsum-based inorganic board to prevent gaps caused by chipped edges. Furthermore, it eliminates the need for on-site splicing of the insulation layer, reducing cumbersome procedures and rework. The pipe trench cement gypsum-based inorganic board embeds a pipe fixing heat-conducting unit, which can quickly conduct heat from the underfloor heating pipes. After constant temperature curing… The resulting dense structure can stably bear the upper load, preventing module deformation from affecting the heat conduction path. During the preparation of the modified polypropylene raw material, drying and pressure injection molding are carried out to ensure that the box structure is dense and pore-free, preventing pores from becoming sound transmission channels or causing air convection heat loss. At the same time, it is environmentally friendly because it does not release volatile organic compounds and is recyclable. In the cement-gypsum-based slurry, ordinary silicate cement and gypsum form a dense structure, reducing pores to weaken sound energy transmission and reduce heat loss. It also helps the heat-equalizing auxiliary medium to form a heat conduction path, while enhancing the interface bonding to avoid sound bridges and heat leakage. Inorganic fillers can optimize the density of the slurry, reduce pores that hinder heat conduction, and the heat-equalizing auxiliary medium can build an efficient heat conduction path to reduce thermal resistance. At the same time, the vibration compaction process can remove air bubbles in the slurry and make it tightly fill the gaps in the bottom corrugations, eliminating interlayer voids, sound bridges and air gaps. Constant temperature curing ensures that the cement-gypsum-based inorganic board is dense and solidified, preventing cracks from causing heat leakage or sound insulation failure. Moreover, the curing process does not require chemical curing agents, reducing pollution. This solves the problems of poor sound insulation, poor heat insulation, poor thermal conductivity, and low construction efficiency of underfloor heating modules.

[0048] The following will describe a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module and its preparation method according to specific embodiments, including:

[0049] Example 1

[0050] This application proposes a five-dimensional elastic sound insulation prefabricated thermal insulation underfloor heating module. The five-dimensional elastic sound insulation prefabricated thermal insulation underfloor heating module is composed of a bottom elastic sound insulation and thermal insulation unit, a four-sided surrounding sound insulation and protection unit, and an embedded pipe fixed heat conduction unit. It is based on a three-dimensional spatial structure as the basic framework, and superimposed with two core functional dimensions of elastic deformation and thermal insulation, forming an integrated module system of three-dimensional structure + two-dimensional function.

[0051] Furthermore, the bottom elastic sound insulation and heat insulation unit consists of a flexural reinforcement layer, a sound insulation reinforcement layer, and a sound insulation and heat insulation layer. The material is a 27mm thick elastic sound insulation modified polypropylene integrated board. The upper surface of the modified polypropylene integrated board has a 5mm high arc-shaped groove, and the lower surface of the board has a wavy pattern with a 5mm gap between the crests and troughs, distributed alternately along the longitudinal and transverse directions. The longitudinal gap between adjacent crests is 38mm, and the transverse gap between adjacent crests is 34mm. Figure 1 As shown.

[0052] Furthermore, the surrounding sound insulation and protection unit serves as a sound insulation and protection layer, made of 15mm thick modified polypropylene sound insulation and heat insulation integrated board. The surrounding modified polypropylene sound insulation and heat insulation integrated board and the elastic sound insulation modified polypropylene integrated board of the bottom elastic sound insulation and heat insulation unit are molded together in one piece to form a box structure.

[0053] Furthermore, the embedded pipe fixing heat conduction unit is located in the heat equalization layer. The heat equalization layer is made of 28mm thick pipe groove cement gypsum-based inorganic board. The pipe groove cement gypsum-based inorganic board is filled in the accommodating space of the box structure. Its lower surface is attached to the upper part of the bottom elastic sound insulation and heat insulation unit. The upper surface is provided with a groove with a depth of 23mm for fixing the underfloor heating pipe. The elastic sound insulation modified polypropylene integrated board directly below the groove is arc-shaped and concave. The width of the arc-shaped concave area is 60mm and the deepest point is 5mm. The position of the groove can be adjusted according to the requirements of the underfloor heating pipe laying.

[0054] This application also proposes a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module and its preparation method, including the following steps:

[0055] (1) Modified polypropylene raw materials are selected and dried. The integrated box structure is prepared by supercritical carbon dioxide foaming injection molding process. The mold is pre-set with a bottom 27mm thick forming area and a surrounding 15mm thick enclosure area. The bottom is set with concave and convex texture matching the wave pattern. After the raw material is melted, supercritical carbon dioxide is injected. After it is fully diffused and dissolved to form a homogeneous system, the molding temperature is controlled at 140℃ and the pressure is 5MPa. After being injected into the mold, foaming is induced by pressure reduction. The first foaming is 15 times and the second foaming is 35 times, so that the bottom elastic sound insulation board and the surrounding enclosure board are foamed and formed in one step to obtain a box structure with specific wave pattern and accommodating space.

[0056] (2) The box structure is transferred to the underfloor heating module molding workshop. The box structure is filled with cement-gypsum based slurry made of gypsum powder, ordinary silicate cement, inorganic filler and heat-averaging auxiliary medium in a mass ratio of 80:10:20:5. Vibration compaction process is adopted during filling, with a vibration frequency of 50Hz. The filling amount is sufficient to form a 28mm thick pipe groove cement-gypsum based inorganic board after molding. The pre-set groove mold is pressed onto the surface of the cement-gypsum based slurry to form a groove suitable for the underfloor heating pipe on the surface of the slurry. Constant temperature curing is adopted, with a curing temperature of 20℃, relative humidity of 50%, and curing time of 48h. After curing, the module strength is tested. When the compressive strength of the pipe groove cement-gypsum based inorganic board is ≥5MPa and there is no cracking or falling off at the joint of the box structure, the strength is judged to meet the standard. The groove mold is removed to obtain a qualified five-dimensional elastic sound insulation assembled thermal insulation underfloor heating module. Figure 2 As shown.

[0057] Furthermore, the drying process in step (1) is carried out at a temperature of 80°C for 2 hours.

[0058] Furthermore, in step (1), the specific settings for the convex and concave textures matching the wave pattern are as follows: the height of the raised part of the texture is 5mm, the depth of the recessed part is 5mm, and the transition surface between the raised and recessed parts is a smooth arc; along the longitudinal direction of the bottom of the mold, the distance between the vertices of adjacent texture convex parts is 38mm, and the vertices of the convex parts are evenly distributed in a straight line with a deviation within ±0.5mm; along the transverse direction of the bottom of the mold, the distance between the vertices of adjacent texture convex parts is 34mm, and they are also evenly distributed in a straight line with a deviation within ±0.5mm; the longitudinal and transverse convex and concave textures intersect to form a matrix distribution; the intersection of the vertices of the longitudinal and transverse convex parts is a complete convex unit; the space between adjacent convex units is a recessed unit; and the bottom of the recessed unit is a smooth plane.

[0059] Furthermore, the specific structure of the pre-set groove mold in step (2) is as follows: the lower surface of the mold is provided with a raised groove forming strip, the height of which is 23mm, and the width of which is adapted to the outer diameter of the underfloor heating pipe. Directly below the groove forming strip, the mold is provided with an inwardly recessed arc forming area, the horizontal width of which is 60mm, the maximum recessed depth of which is 5mm, and the arc surface transition is smooth. The overall size of the mold is adapted to the accommodating space of the box structure, ensuring that it can accurately cover the upper surface of the cement gypsum-based slurry during pressing, and press and form the required pipe groove and the lower arc-shaped recessed structure in one go. At the same time, the edge of the mold is provided with positioning buckles, which can accurately connect with the edge of the box structure, such as Figure 3 As shown.

[0060] Furthermore, in step (2), the inorganic filler is heavy calcium carbonate.

[0061] Furthermore, in step (2), the heat-generating auxiliary medium is alumina powder.

[0062] Example 2

[0063] Example 2 has the same module structure as Example 1. In terms of preparation parameters, the secondary foaming ratio is adjusted to 40 times. The rest are the same as Example 1, and will not be repeated.

[0064] Example 3

[0065] Example 3 has the same module structure as Example 1. In terms of preparation parameters, the secondary foaming ratio is adjusted to 45 times. The rest are the same as Example 1, and will not be repeated.

[0066] Example 4

[0067] Example 4 has the same module structure as Example 1. In terms of preparation parameters, the secondary foaming ratio is adjusted to 50 times. The rest are the same as Example 1, and will not be repeated.

[0068] Example 5

[0069] Example 5 has the same module structure as Example 1. In terms of preparation parameters, the secondary foaming ratio is adjusted to 55 times, and the rest are the same as Example 1, so they will not be repeated.

[0070] Comparative Example 1

[0071] Comparative Example 1 has the same module structure as Example 1. In terms of preparation parameters, the modified polypropylene board is replaced with a high-density extruded polystyrene board. All other parameters are the same as in Example 1 and will not be repeated here.

[0072] Comparative Example 2

[0073] Comparative Example 2 has the same module structure as Example 1. In terms of preparation parameters, the modified polypropylene board is replaced with a low-density extruded polystyrene board. All other parameters are the same as in Example 1 and will not be repeated here.

[0074] Comparative Example 3

[0075] Comparative Example 3 has the same module structure as Example 1. In terms of preparation parameters, the modified polypropylene plate is replaced with a low-density graphite polystyrene plate. All other parameters are the same as in Example 1 and will not be repeated here.

[0076] Performance testing

[0077] 1. On-site impact sound insulation performance test

[0078] Test equipment: standard impact sound generator, precision sound level meter, room acoustic measurement software, modular installation tools, temperature and humidity recorder, sample cutter, surface cleaning cloth, boundary sealing strip, reference floor sound insulation calibration sample, and data storage server.

[0079] Test Step 1: Select an open area that meets the test requirements. Install the five-dimensional elastic sound insulation prefabricated thermal insulation underfloor heating modules according to actual building construction standards. The total installation area is 12㎡, and the installation area size is set to 4m×3m. During the installation process, ensure that the modules are intact, including the bottom elastic sound insulation and thermal insulation unit, the surrounding sound insulation and protection unit, and the embedded pipe fixed heat conduction unit. The gap between adjacent modules should be ≤1mm. Gently tap the surface of the modules with a rubber mallet to ensure that the modules are tightly attached to the base layer. Check the flatness of the installation surface with a spirit level; the deviation should be ≤2mm / 2. After the paving is completed, seal the gaps between the edges of the modules and the site boundary with boundary sealing strips to prevent impact noise from being transmitted through the boundary gaps. At the same time, select 5 test points on the module surface in a quincunx pattern, including 1 point in the center and 1 point at each of the four corners. Wipe the module surface within a 500mm radius around each test point with a surface cleaning cloth to check for module warping, unit layer peeling, pipe groove deformation, and sealing strip detachment. Measure the actual length and width of the paved area with a tape measure, accurate to 1mm, and record the paved area and the number of modules spliced.

[0080] Test Step Two: Use a temperature and humidity recorder to monitor the environmental parameters of the test area in real time, controlling the temperature to be maintained at 23±2℃ and the relative humidity at 50±5%. If the ambient temperature and humidity exceed the range, turn on the constant temperature and humidity equipment for adjustment. After the temperature and humidity stabilize for 2 hours, start the subsequent test. During this period, record the temperature and humidity data once every 30 minutes to ensure that the environmental parameters meet the requirements throughout the test. Connect the standard impact sound generator, precision sound level meter and room acoustic measurement software, turn on and preheat for 40 minutes. After the signals of each module of the equipment are stable, use the reference floor sound insulation calibration sample to calibrate the instrument: fix the calibration sample in the center of the reference area, start the impact sound generator, output impact energy at 1 / 3 octave band, frequency range 100-5000Hz, and collect the reference impact sound pressure level L0 recorded by the sound level meter through the acoustic measurement software. Ensure that the equipment test error during the calibration process is ≤±1.5dB. If the error exceeds the range, readjust the impact force of the impact sound generator and the sampling frequency of the sound level meter until the calibration is qualified.

[0081] Test Step 3: Place five precision sound level meters 300mm directly below the module installation area, following the corresponding test point principle. The sound level meter probes should be vertically pointed towards the test point in the installation area, with a distance of 500±5mm between the probe and the lower surface of the module. Secure the sound level meters with brackets to ensure the probes do not wobble during the test. Simultaneously, place five sound level meters at the same location directly below the reference area, with parameter settings consistent with the module area. Wearing clean gloves, operate the standard impact sound generator, placing it at the center test point of the module installation area. Adjust the generator height so that the impact hammer makes perpendicular contact with the module surface. Set the impact force to 50N, start the generator, and input frequencies sequentially from 100Hz to 5000Hz in 1 / 3 octave bands. An impact signal is emitted, and each frequency point is continuously impacted for 60 seconds. During this period, the impact sound pressure level L1 recorded by the sound level meter below is collected in real time through acoustic measurement software. The ambient temperature and humidity at that frequency point are also recorded simultaneously. Following the same operating procedure, the remaining 4 detection points in the module paving area are tested in sequence. After the test of each detection point is completed, the impact sound generator is moved to the corresponding detection point in the reference area, and the impact test is repeated. The impact sound pressure level L2 recorded by the sound level meter below the reference area is collected. If the sound level meter data fluctuation is > ±3dB, the impact sound generator is displaced, or the equipment is disconnected during the test, the data of that detection point is invalidated. The equipment is recalibrated and the test is repeated to ensure that there are no less than 3 sets of valid data for each frequency point of each detection point.

[0082] Test Step 4: After the test is completed, according to GB / T50121-2005 "Standard for Evaluation of Building Sound Insulation", calculate the impact sound insulation of each test point: Impact sound insulation Ln = L2 - L1 (unit dB), where L2 is the impact sound pressure level of the reference area and L1 is the impact sound pressure level of the module paving area. The larger the Ln value, the better the module's sound insulation effect on impact. Take the average value of Ln at each frequency point of the 5 test points in the module paving area according to the frequency range of 100-5000Hz to obtain the frequency band impact sound insulation of the area; then calculate the weighted impact sound insulation (Ln,w) according to the standard formula. During the calculation, the influence of environmental noise on the test results needs to be deducted.

[0083] Test Step 5: After the test, turn off the power to all equipment. Wipe the impact hammer, precision sound level meter probe, and bracket of the standard impact sound generator with a surface cleaning cloth. Check that the impact hammer is free from wear and the sound level meter probe is free from blockage. Remove the sealing strips from the module installation area, clean any residual adhesive residue on the module surface, and organize the installation tools and test equipment to ensure that the equipment is intact. Compile the test data: summarize the frequency band impact sound pressure level, impact sound insulation, and weighted impact sound insulation calculation process for each test point, and simultaneously attach the environmental temperature and humidity records, equipment calibration report, and on-site photos of the module installation. Clearly mark the test date, module production batch, corresponding embodiment number, test personnel, and test point location.

[0084] 2. Thermal insulation performance test

[0085] Test equipment: intelligent constant temperature floor heating system, multi-point temperature acquisition instrument, temperature sensor, infrared thermal imager, modular installation tool, temperature and humidity recorder, surface cleaning cloth, boundary insulation and sealing cotton, data storage server, and standard insulation material calibration samples.

[0086] Test Step 1: Select a sealed room that meets the testing requirements. Install the five-dimensional elastic sound insulation prefabricated underfloor heating modules according to actual building construction standards. The total installation area is 12㎡, with the installation area dimensions set at 4m×3m. During installation, ensure that the modules are complete, including the bottom elastic sound insulation and heat insulation unit, the surrounding sound insulation and protection unit, and the embedded pipe fixing heat conduction unit. The gap between adjacent modules should be ≤1mm. Gently tap the module surface with a rubber mallet to ensure a tight fit between the module and the base layer. Check the flatness of the installation surface with a spirit level; the deviation should be ≤2mm / 2m. Lay Φ20mm underfloor heating pipes in the embedded pipe fixing grooves within the modules, with a pipe spacing of 200mm, conforming to the civil building underfloor heating installation specifications. After installation... Fill the gaps between the module's edges and the room walls with boundary insulation and sealing cotton to prevent heat loss through the wall gaps. Arrange five temperature monitoring areas on the module surface in a quincunx pattern, including one central area and one area at each of the four corners. Evenly distribute three temperature sensors in each area, located on the module surface, the contact surface between the module and the base layer, and the outer wall of the underfloor heating pipes, respectively. Fix the sensors with high-temperature tape to ensure that the sensors are tightly attached to the test surface without air gaps. Wipe the module surface with a surface cleaning cloth to check for module warping, unit layer peeling, pipe groove deformation, and sealing cotton detachment. Measure the actual length and width of the paved area with a tape measure, accurate to 1mm, and record the paved area, the number of module splices, and the pipe laying parameters.

[0087] Test Step Two: Close the doors and windows of both test rooms, turn on the temperature and humidity recorder, and monitor the ambient temperature and relative humidity in real time. Control the ambient temperature to be stable at 18±1℃ and the relative humidity at 50±5%. If the ambient temperature and humidity exceed the range, turn on the room air conditioner and dehumidifier / humidifier to adjust. After the temperature and humidity have stabilized for 4 hours, start the subsequent test. Record the temperature and humidity data once every 1 hour during the test to ensure that the environmental parameters meet the requirements throughout the test. Connect the intelligent constant temperature floor heating system and thermostat, set the thermostat temperature to 50℃, and preheat for 30 minutes. After the floor heating system output is stable, use standard insulation material calibration samples to calibrate the equipment: cover the surface of the temperature sensor with the standard sample, record the temperature difference between the sample surface and the interior using a multi-point temperature acquisition instrument, calculate the heat flux density using the known thermal conductivity, and compare the equipment display value with the theoretical calculation value to ensure that the equipment test error is ≤±3%. At the same time, calibrate the infrared thermal imager to ensure that its temperature measurement accuracy meets the requirements. If the error exceeds the range, readjust the equipment parameters until the calibration is qualified.

[0088] Test Step 3: Start the intelligent constant temperature underfloor heating system in the test room, set the thermostat to a fixed temperature of 50℃, and simultaneously start the multi-point temperature acquisition instrument and infrared thermal imager to collect data at a frequency of 15 minutes / time: record the module surface temperature (T1), the temperature of the module-substrate contact surface (T2), and the temperature of the outer wall of the underfloor heating pipe (T3) through temperature sensors; capture the surface temperature distribution image of the module through the infrared thermal imager to analyze whether there are local hot spots or cold spots; at the same time, record the real-time power (P) of the underfloor heating system and calculate the heat consumption per unit area (q=P / S, S is 12㎡). Continuously collect data for 24 hours. If the temperature sensor data fluctuation exceeds [a certain value], [further data collection will be performed]. If the temperature drops by ±0.5℃, the floor heating system power suddenly changes, or the infrared thermal imager shows abnormalities, the data for that time period is invalid. Check the sensor connection and the status of the floor heating system, and collect data again after stabilization, ensuring that the effective data collection time is no less than 20 hours. Following the same operating procedure, start the floor heating system in the comparison group room and synchronously collect the temperature data and system power of the traditional module, ensuring that the time nodes and collection frequencies of the two groups of tests are consistent. One hour before the end of the test, use an infrared thermal imager to completely scan the module installation area of ​​the two rooms, save the temperature distribution image, and focus on recording the temperature differences between the module splicing points, edges and the center area to analyze the impact of module splicing gaps on thermal insulation performance.

[0089] Test Step 4: Organize the collected temperature data and calculate the key thermal insulation indicators of the test module: Heat flux density: Based on Fourier's law, combined with the module thickness (50mm) and the temperature difference (T3-T2), calculate the thermal conductivity of the module λ=(q×d) / (T3-T2), where d is the module thickness and q is the heat consumption per unit area; Surface temperature uniformity: Calculate the average temperature and maximum temperature difference of 5 monitoring areas on the module surface. The smaller the maximum temperature difference, the more uniform the thermal insulation performance of the module; Heat loss rate: Compare the input power of the underfloor heating system with the theoretical heat dissipation power, calculate the heat loss rate = (input power - theoretical heat dissipation power) / input power×100%. The lower the heat loss rate, the better the thermal insulation effect. Combined with the temperature distribution image captured by the infrared thermal imager, determine whether there is heat leakage at the module splicing point, clarify the thermal insulation performance advantages and potential optimization points of the module in the actual paving scenario, and form a quantitative performance conclusion.

[0090] Test Step 5: After the test, turn off the power to the intelligent constant temperature floor heating system, multi-point temperature acquisition instrument, and infrared thermal imager. Wipe the temperature sensor, infrared thermal imager lens, and floor heating system control panel with a surface cleaning cloth to check that the sensor is undamaged and the equipment is fault-free. Remove the temperature sensor and boundary insulation sealing cotton from the module surface, clean the residual tape on the module surface, and organize the installation tools and test equipment to ensure that the equipment is intact. Compile the test data: summarize the temperature data of the two rooms over 24 hours, system power data, and thermal conductivity calculation process, and simultaneously attach the environmental temperature and humidity records, equipment calibration report, infrared thermal imaging temperature distribution image, and on-site photos of module installation. Clearly mark the test date, module production batch, corresponding implementation example number, test personnel, and monitoring area location.

[0091] 3. Thermal conductivity test

[0092] Test equipment: Protective hot plate thermal conductivity test system, high-precision heat flow sensor, multi-point thermocouple temperature measurement system, ambient temperature control system, special tools for module installation, surface cleaning cloth, high-temperature insulation sealing tape, data acquisition and analysis software, and standard insulation samples.

[0093] Test Step 1: Select a sealed test room with no airflow and no external heat interference. Install five-dimensional elastic sound insulation prefabricated underfloor heating modules according to the civil building underfloor heating construction specifications. The total installation area is 12㎡, and the installation area size is set at 4m×3m. During installation, ensure that the modules are complete, including the bottom elastic sound insulation and heat insulation unit, the surrounding sound insulation and protection unit, and the embedded pipe fixing heat conduction unit. Fill and seal the gaps between adjacent modules with high-temperature heat insulation sealing tape, and the gap width is ≤0.5mm. Gently tap the surface of the module with a rubber mallet to ensure that the module is completely in contact with the base layer. Check the flatness of the installation surface with a 2m level. The overall deviation is ≤1.5mm to avoid heat flow short circuits caused by module gaps. According to the test area selection requirements in GB / T10294-2008, the 12㎡ paved area was divided into 5 test areas according to the principle of uniform distribution: 1 in the center and 4 at 1m from the edge. The size of each test area was 500mm×500mm. A positioning point was marked in the center of each test area. The actual thickness (dactual) of the module was measured with a tape measure. Three points were measured in each area: the center and both sides. The average value was taken as the module thickness of the area, accurate to 0.1mm. The surface of the module in the test area was wiped with a surface cleaning cloth to check for module cracks, unit layer peeling, and pipe groove deformation. If surface protrusions or depressions >0.3mm were found, they were lightly sanded smooth with fine sandpaper.

[0094] Test Step Two: Activate the ambient temperature control system to stabilize the ambient temperature in both test rooms at 23±0.5℃ and relative humidity at 50±2%, continuously monitoring for 6 hours. Record the ambient temperature and humidity every hour during this period. Once the ambient temperature and humidity fluctuations are ≤±0.2℃ / ±1%, initiate subsequent tests. To avoid environmental parameter fluctuations affecting the establishment of thermal steady state, follow the equipment calibration procedure in GB / T10294-2008, connect the protective hot plate method thermal conductivity testing system and data acquisition software, and set the system's main hot plate temperature to 50℃ and the cold plate temperature to 20℃. Preheat the machine for 60 minutes. After the system temperature output stabilizes, cover the test area of ​​the main hot plate with the standard insulation sample, seal the edge gaps of the sample, run the test system, and collect the heat flux density (qstandard) and the temperature difference between the upper and lower surfaces of the standard sample (ΔTstandard = Tmain hot plate - Tcold plate). Calculate the measured thermal conductivity according to the formula λstandard = (qstandard × dstandard) / ΔTstandard (dstandard is the thickness of the standard sample, accurate to 0.1 mm). If the deviation from the known value is > ±2%, adjust the power output accuracy of the main hot plate and the thermocouple calibration parameters until the calibration is qualified, and record the calibration report.

[0095] Test Step 3: Remove the standard insulation sample, and accurately cover the main heat plate and protective heat plate of the protective heat plate test system in the first test area of ​​the test group. Ensure that the center of the main heat plate coincides with the positioning point of the test area, and that the protective heat plate completely wraps the edge of the main heat plate. Seal the gap between the heat plate and the module surface with high-temperature insulation sealing tape to prevent heat from leaking from the edge. Start the test system, set the main hot plate temperature to 50℃ and the cold plate temperature to 20℃, and simultaneously turn on the multi-point thermocouple temperature measurement system and heat flux sensor. Data acquisition is performed according to the GB / T10294-2008 steady-state judgment standard: In the initial stage, heat flux density (qactual), main hot plate temperature (T1), cold plate temperature (T2), and module middle layer temperature (T3) are recorded every 15 minutes. When the heat flux density fluctuation is ≤±1% and the temperature fluctuation is ≤±0.1K for 4 consecutive records, thermal steady state is determined to be reached. After that, the effective data acquisition stage begins, with 1 set of data recorded every 30 minutes, and 6 sets of effective data are collected for each test area. If heat flux density fluctuation >±3%, poor thermocouple contact, or system power failure occurs during the test, the test for that area is invalid, the equipment is recalibrated, and the test is repeated after stabilizing for 2 hours.

[0096] Test Step 4: According to the calculation method of thermal conductivity in GB / T10294-2008, calculate the effective data for each test area: thermal conductivity λactual = (qactual × dactual) / (T1-T2), where qactual is the average heat flux density (unit: W / m²), dactual is the average module thickness (unit: m), and T1-T2 is the average temperature difference between the main hot plate and the cold plate (unit: K). Take the average λactual of 6 sets of data for each test area, and then calculate the overall average thermal conductivity (λaverage) of the 5 areas as the thermal conductivity performance index of this batch of modules, accurate to 0.001 W / (m·K).

[0097] Test Step 5: After the test, turn off the power to the protective hot plate thermal conductivity test system and the ambient temperature control system. Wipe the surface of the main hot plate, cold plate, and thermocouple probe with a surface cleaning cloth. Check that the hot plate heating unit and sensor cables are undamaged. Remove the hot plate and sealing tape from the test area. Fill any indentations on the module surface with insulating glue. Clean up tools and waste materials in the test room. Ensure that the module installation area is intact. Organize the data according to the GB / T10294-2008 test report format requirements: summarize the thermal conductivity calculation process, thermal steady-state records, and ambient temperature and humidity data for each test area of ​​the two groups. Simultaneously attach the equipment calibration report, test area distribution map, and on-site photos of module installation. Clearly indicate the test date, module production batch, standard number (GB / T10294-2008), and corresponding example / comparative example number.

[0098] The following are the performance test results of Examples 1-5 and Comparative Examples 1-3, as shown in Table 1:

[0099] Table 1: Performance test results of examples and comparative examples

[0100] Group Class Bulk density kg / m3 Thermal conductivity W / (m・K) Weighted sound insulation dB Example 1 Secondary foaming ratio 35P 25.3 0.032 68 Example 2 Secondary foaming ratio 40P 22.1 0.033 63 Example 3 Secondary foaming ratio 45P 19.6 0.034 59 Example 4 Secondary foaming ratio 50P 17.2 0.035 55 Example 5 Secondary foaming ratio 55P 15.7 0.038 52 Comparative Example 1 Vibration and sound insulation / heat insulation material Extruded polystyrene board 32 0.027 70 Comparative Example 2 Vibration and sound insulation / heat insulation material Extruded polystyrene board 28 0.030 69 Comparative Example 3 Vibration and sound insulation / heat insulation material Graphite polystyrene board 25 0.032 67

[0101] As shown in Table 1, in Examples 1-5, with the increase of the secondary foaming ratio, the number of closed-cell bubbles inside the modified polypropylene board increases and the pore size expands, causing the module's density to continuously decrease. The decrease in density extends the internal heat conduction path of the material and increases the air content, resulting in a slight increase in thermal conductivity. However, the loose bubble structure caused by the decrease in density strengthens the ability to block sound waves, resulting in a gradual decrease in weighted sound insulation. The high-density extruded polystyrene board of Comparative Example 1 has a denser structure and a lower thermal conductivity than the modified polypropylene board of Example 1. However, its brittle and hard characteristics and denser structure weaken the sound wave blocking, resulting in a higher weighted sound insulation than Example 1. The low-density extruded polystyrene board of Comparative Example 2 has a lower density than Comparative Example 1 and a weaker structural density. Its thermal conductivity is higher than Comparative Example 1, and its weighted sound insulation is close to that of Example 1. The low-density graphite polystyrene board of Comparative Example 3 has good thermal conductivity and a density close to that of Example 1. However, its brittle structure enhances solid-borne sound transmission, and its weighted sound insulation is also higher than the current national standard limit of 65 dB.

[0102] This application provides a method for preparing a five-dimensional elastic sound-insulating prefabricated thermal insulation underfloor heating module. It uses an elastic sound-insulating modified polypropylene integrated board as the bottom elastic sound-insulating thermal insulation unit. Through its own elastic deformation, it absorbs vibration energy to weaken solid-borne sound transmission. Its closed-cell structure reduces airborne sound penetration and blocks air convection and heat conduction. Simultaneously, the high-wave texture on the upper surface breaks the continuous propagation path of vibration waves through sound wave interference, and also increases the contact area with the embedded cement gypsum-based inorganic board to avoid interlayer voids forming sound bridges. The modified polypropylene sound-insulating thermal insulation integrated board serves as a four-sided enclosed sound insulation protection unit. It forms a sealed box with the bottom unit in one molding process, using the closed-cell structure to block airborne sound and heat transmission, eliminating traditional splicing gaps to block sound and thermal bridges. It also wraps the internal cement gypsum-based inorganic board to prevent gaps caused by chipped edges. Furthermore, it eliminates the need for on-site splicing of the insulation layer, reducing cumbersome procedures and rework. The pipe trench cement gypsum-based inorganic board embeds a pipe fixing heat-conducting unit, which can quickly conduct heat from the underfloor heating pipes. After constant temperature curing… The resulting dense structure can stably bear the upper load, preventing module deformation from affecting the heat conduction path. During the preparation of the modified polypropylene raw material, drying and pressure injection molding are carried out to ensure that the box structure is dense and pore-free, preventing pores from becoming sound transmission channels or causing air convection heat loss. At the same time, it is environmentally friendly because it does not release volatile organic compounds and is recyclable. In the cement-gypsum-based slurry, ordinary silicate cement and gypsum form a dense structure, reducing pores to weaken sound energy transmission and reduce heat loss. It also helps the heat-equalizing auxiliary medium to form a heat conduction path, while enhancing the interface bonding to avoid sound bridges and heat leakage. Inorganic fillers can optimize the density of the slurry, reduce pores that hinder heat conduction, and the heat-equalizing auxiliary medium can build an efficient heat conduction path to reduce thermal resistance. At the same time, the vibration compaction process can remove air bubbles in the slurry and make it tightly fill the gaps in the bottom corrugations, eliminating interlayer voids, sound bridges and air gaps. Constant temperature curing ensures that the cement-gypsum-based inorganic board is dense and solidified, preventing cracks from causing heat leakage or sound insulation failure. Moreover, the curing process does not require chemical curing agents, reducing pollution. This solves the problems of poor sound insulation, poor heat insulation, poor thermal conductivity, and low construction efficiency of underfloor heating modules.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A five-dimensional elastic soundproofing assembled heat preservation floor heating module, characterized in that, The five-dimensional elastic sound insulation assembled heat preservation floor heating module is composed of a bottom elastic sound insulation heat preservation unit, a four-around sound insulation protection unit and an embedded pipeline fixing heat conduction unit, and is based on a three-dimensional space structure as a basic framework, and is stacked with two core function dimensions of vibration reduction, sound insulation, heat insulation and heat preservation to form an integrated module system of three-dimensional structure and two-dimensional function.

2. The five-dimensional elastic soundproofing and heat preserving floor module according to claim 1, characterized in that, The bottom elastic sound insulation heat preservation unit is composed of a bending-resistant reinforcing layer, a sound insulation heat preservation layer and a sound insulation reinforcing layer, and is made of a 27mm-thick elastic sound insulation modified polypropylene integrated plate, the upper surface of the modified polypropylene integrated plate is provided with an arc-shaped groove with a height of 5mm, the lower surface of the integrated plate is provided with a wave pattern, the distance between the wave crest and the wave trough is 5mm, and the wave crest and the wave trough are distributed along the longitudinal direction and the transverse direction, respectively, wherein the distance between the adjacent wave crests in the longitudinal direction is 38mm, and the distance between the adjacent wave crests in the transverse direction is 34mm.

3. The five-dimensional elastic soundproofing and heating module according to claim 1, characterized in that, The four-around sound insulation protection unit is used as a sound insulation protection layer and is made of a 15mm-thick modified polypropylene sound insulation heat preservation integrated plate, and the four-around modified polypropylene sound insulation heat preservation integrated plate and the elastic sound insulation modified polypropylene integrated plate of the bottom elastic sound insulation heat preservation unit are integrally formed to form a box structure.

4. The five-dimensional elastic soundproofing and heating module according to claim 1, characterized in that, The embedded pipeline fixing heat conduction unit is located in a heat equalizing layer, and the heat equalizing layer is made of a 28mm-thick pipeline groove cement gypsum-based inorganic plate, the pipeline groove cement gypsum-based inorganic plate is filled in the accommodating space of the box structure, the lower surface thereof is attached to the upper portion of the bottom elastic sound insulation heat preservation unit, and the upper surface thereof is provided with a groove with a depth of 23mm for fixing the floor heating pipeline, and the elastic sound insulation modified polypropylene integrated plate directly below the groove is arc-shaped and concave, the width of the arc-shaped concave area is 60mm, the deepest part is 5mm, and the position of the groove can be adjusted according to the laying requirements of the floor heating pipeline.

5. The five-dimensional elastic soundproofing and heating module according to claim 1, wherein, The preparation method of the five-dimensional elastic sound insulation assembled heat preservation floor heating module comprises the following steps: (1) modified polypropylene raw materials are selected, dried, and then an integrated box structure is prepared by using a supercritical carbon dioxide foaming injection integrated process, a mold is provided with a 27mm-thick bottom forming area and a 15mm-thick surrounding area around the four sides, the bottom is provided with concave-convex lines matched with the wave pattern, the raw materials are melted and injected into supercritical carbon dioxide, a homogeneous system is formed after sufficient diffusion and dissolution, the forming temperature is controlled to be 140-180℃, the pressure is controlled to be 5-10MPa, the raw materials are induced to foam after being injected into the mold, the bottom elastic sound insulation plate and the four-around surrounding plate are once foamed and formed, and a box structure with a specific wave pattern and an accommodating space is obtained; (2) The box structure is transferred to a floor heating module forming workshop, and a cement gypsum-based slurry prepared by mixing ordinary portland cement, gypsum powder, inorganic filler and uniform heating auxiliary medium at a mass ratio of 80:(10-20):(20-25):(5-8) is filled into the accommodating space of the box structure. During the filling process, a vibration compaction process is used, the vibration frequency is 50-80 Hz, and the filling amount satisfies the formation of a 28 mm thick pipeline groove cement gypsum-based inorganic plate after forming. A preset groove mold is pressed onto the upper surface of the cement gypsum-based slurry, so that the upper surface of the slurry forms a groove adapted to the floor heating pipeline. Constant temperature curing is adopted, the curing temperature is 20-25°C, the relative humidity is 50-60%, the curing time is 48-72 h, and after the curing is completed, the module strength is detected. When the compressive strength of the pipeline groove cement gypsum-based inorganic plate is greater than or equal to 5 MPa and there is no cracking and falling off at the splicing position of the box structure, it is determined that the strength meets the standard, the groove mold is removed, and a qualified five-dimensional elastic sound insulation assembly type heat preservation floor heating module is obtained. 6.The five-dimensional elastic soundproofing and heating module according to claim 1, wherein, The temperature of the drying treatment in the step (1) is 80-100°C, and the time is 2-3 h. 7.The five-dimensional elastic soundproofing and heating module according to claim 1, wherein, The concave-convex lines matched with the wave lines in the step (1) are specifically provided as follows: the height of the convex part of the lines is 5 mm, the depth of the concave part is 5 mm, and the transition surface between the convex part and the concave part is a smooth arc; along the longitudinal direction of the mold bottom, the distance between the adjacent convex top points of the lines is 38 mm, and the convex top points are uniformly distributed in a straight line with a deviation of ±0.5 mm; along the transverse direction of the mold bottom, the distance between the adjacent convex top points of the lines is 34 mm, and the convex top points are also uniformly distributed in a straight line with a deviation of ±0.5 mm; the longitudinal and transverse concave-convex lines are interlaced to form a matrix distribution, the intersection point of the longitudinal and transverse convex top points is a complete convex unit, and the adjacent convex units are concave units, and the bottom of the concave unit is a smooth plane. 8.The five-dimensional elastic soundproofing and heating module according to claim 5, wherein, The specific structure of the preset groove mold in the step (2) is as follows: the lower surface of the mold is provided with a convex groove forming strip, the height of the forming strip is 23 mm, and the width of the forming strip is adapted to the outer diameter of the floor heating pipeline. An arc forming area is provided correspondingly inwardly concave below the groove forming strip, the horizontal width of the arc forming area is 60 mm, the maximum concave depth of the arc forming area is 5 mm, and the transition surface of the arc is smooth. The overall size of the mold is adapted to the accommodating space of the box structure, so that the upper surface of the cement gypsum-based slurry can be accurately covered when the mold is pressed, and the pipeline groove and the arc-shaped downward concave structure below can be formed by one-time pressing. In addition, the edge of the mold is provided with a positioning buckle, which can be accurately connected with the edge of the box structure. 9.The five-dimensional elastic soundproofing and heating module according to claim 5, wherein, The inorganic filler in the step (2) is any one of heavy calcium carbonate, quartz sand and talcum powder. 10.The five-dimensional elastic soundproofing and heating module according to claim 1, wherein, The uniform heating auxiliary medium in the step (2) is any one of alumina powder, boron nitride powder, epoxy resin and water.

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