Active noise reduction dustproof partition curtain for production area

Abstract

A production area active noise reduction dustproof partition curtain, a surface layer soft sound absorption and insulation film (1), a secondary surface layer buffer refraction and diffusion net (2), a net-shaped piezoelectric film (3), an insulation heat conduction interlayer (4), a coupling current collection heat dissipation net (5) and a heat dissipation buffer insulation substrate (6) are laminated and fixed into a composite layer structure, and a partition insulation belt (7) or a heat dissipation dust collection safe edge (8) is arranged on the periphery in a surrounding and sealing mode. A composite absorption, refraction, piezoelectric conversion, grounding and heat dissipation integrated structure is adopted, noise energy is absorbed and eliminated in a layered mode, piezoelectric grounding and heating heat dissipation loads are balanced and optimized, and the whole structure is integrated into a noise attenuation and digestion energy-saving and low-consumption bearing system. Real-time active noise reduction is achieved, and under the constraint condition that the limited thickness is controlled, high noise blocking, noise absorption, heat dissipation and dust prevention functions are integrated. The noise reduction and dust prevention effects are greatly improved, and the device can work in a broadband and high-frequency range; the energy conversion efficiency and the corrosion resistance are high, and stability and safety are achieved. And even the underwater working requirement is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of insulation or other protective curtain walls of buildings classified in IPC E04B2 / 88 or B08B15 / 02 covering the generating place with a container or cover to prevent noise and dirt or smoke from escaping from the generating place, and in particular relates to a structural improvement and innovative technology of a curtain panel or a curtain used for isolating dust and noise protection in a production area. Background Art

[0002] In industrial production, many devices will generate noise. For example, in the production process of PVC paste resin, PVC modified resin, chloropropylene emulsion, titanium dioxide, antimony trioxide and other additives, there will be certain dust and noise problems that need to be dealt with. In traditional technology, it is difficult to solve this problem and the effect is not ideal.

[0003] In terms of noise elimination, in addition to controlling the source of noise, sound barrier technology is often used to block or partially absorb and reduce the impact of certain noises, in order to achieve a limited noise reduction effect. In production areas where people are involved, the existing effective closed sound insulation technology cannot be used, and there are limited technical means for noise reduction in open spaces.

[0004] At present, there are few public disclosures of noise reduction technologies mainly applicable to production areas. However, there is some space in patent applications for noise reduction technologies in outdoor open spaces.

[0005] For example, patent application 202021756027.0 relates to a soundproof and noise-reducing curtain wall structure, including a curtain wall module and a plurality of soundproof and noise-reducing modules. The curtain wall module includes an outer curtain wall unit and an inner curtain wall unit arranged opposite to each other. The outer curtain wall unit is provided with a plurality of openings arranged at intervals. A flexible sealing plate is provided between the outer curtain wall unit and the inner curtain wall unit to isolate the opening and the inner curtain wall unit. The plurality of soundproof and noise-reducing modules and the plurality of openings are arranged one by one. Each soundproof and noise-reducing module includes an elastic member and a push member arranged opposite to each other. One end of the elastic member is fixedly mounted on the inner curtain wall unit, and the other end thereof is fixedly mounted on the flexible sealing plate. The push member is assembled in the opening, and one end thereof facing the inner curtain wall unit is fixedly mounted on the flexible sealing plate. Under the action of an external force outside, the push member can move in a direction toward or away from the inner curtain wall unit. Among them, a sound-absorbing cotton is provided in the push member, and a plurality of protrusions arranged at intervals are provided at one end of the push member facing away from the inner curtain wall unit.

[0006] Patent application 202310153526.2 discloses a noise reduction curtain wall, in which the curtain wall body includes a plurality of first panels and a second panel, a plurality of second panels are interconnected with the exterior wall of the building, a plurality of first panels and a plurality of second panels are interconnected by connecting members, and when the first panel and the second panel are connected, a channel for air circulation is formed between the two.

[0007] The working principle of this type of traditional technology is mostly passive noise reduction, which is mainly used for high, medium and high frequency noises that have a prominent impact on the environment. For medium and low frequency noises that are difficult to handle, related technologies have been under exploration for a long time. It even includes the further development of sound-absorbing material application technology. For example, the reasonable use of sound-absorbing materials, such as glass, seaweed, foam, plastic and sound-absorbing bricks, can reduce the reverberation caused by reflection, thereby reducing the noise level. However, the sound insulation and noise reduction effect after installation is not ideal, and it is difficult to apply to production areas and cannot meet environmental and humanistic needs. Among them, there are devices used in traditional noise reduction technology. When only high and medium frequency noises are blocked, the noise energy is not eliminated, and it usually acts on the noise reduction device, causing it to stimulate the regeneration of medium and low frequency noises that are difficult to eliminate.

[0008] The latest developments focus on active noise reduction technologies, such as:

[0009] Patent application 202011039192.9 discloses an active noise reduction and sound collection device sound barrier and its working method, which is installed on the side of a railway or a highway, and includes a plurality of columns evenly arranged on a concrete base, and a top plate and a sound barrier plate arranged opposite to each other are installed between every two adjacent columns. A noise conversion device and a solar energy conversion device are provided on the sound barrier plate, and the noise conversion device includes an active noise reduction device and a sound collection device.

[0010] Patent application 202011039192.9 discloses an active noise reduction and sound collection device sound barrier and its working method, which is installed on the side of a railway or a highway, and includes a plurality of columns evenly arranged on a concrete base, and a top plate and a sound barrier plate arranged opposite to each other are installed between every two adjacent columns. A noise conversion device and a solar energy conversion device are provided on the sound barrier plate, and the noise conversion device includes an active noise reduction device and a sound collection device.

[0011] Patent application 202410817416.6 provides an active noise reduction anechoic tile and a noise reduction control method thereof, which relates to the technical field of anechoic tiles. The active noise reduction anechoic tile comprises a shape memory polymer matrix, a piezoelectric ceramic and a tile inner cavity, wherein the tile inner cavity is arranged in a shape memory polymer matrix, the piezoelectric ceramic is embedded in the tile inner cavity, and the piezoelectric ceramic can output an anti-phase action corresponding to the vibration of the shape memory polymer matrix. The piezoelectric ceramic is arranged in the anechoic tile structure of the shape memory polymer matrix, and outputs an anti-phase action corresponding to the vibration of the shape memory polymer matrix anechoic tile to suppress the vibration of the shape memory polymer matrix anechoic tile; the tile inner cavity can absorb noise in a specific frequency band based on the variable stiffness characteristics of the shape memory polymer matrix; by arranging the piezoelectric ceramic in the shape memory polymer matrix structure, the anechoic tile structure is combined with the smart material shape memory polymer to achieve active vibration reduction and noise reduction functions.

[0012] A Chinese patent with announcement number CN111234375B discloses a sound-absorbing and noise-reducing material, a preparation method and an application thereof. The invention forms a multi-level pore characteristic by adding hollow glass microspheres of different particle sizes to a polymer resin such as polypropylene, polyethylene or polyoxymethylene. The pore size can be adjusted by the added hollow glass microspheres. The porosity of the composite material can be regulated by controlling the amount and size of the hollow glass microspheres added. Zirconium hydrogen phosphate is added as a reinforcing and toughening agent to achieve the purpose of adjusting the sound absorption, noise reduction and mechanical properties of the composite material. However, since the noise generated by the transformer during operation is mainly low-frequency noise, and the impact of the noise is long-term and continuous, it will cause chronic damage to the human body, and the low-frequency noise has the strongest amplitude in the amplitude, and is most harmful to the human body. The sound absorption coefficient of the sound-absorbing and noise-reducing material prepared in the invention is low at low frequencies and cannot be used as a shell material for the transformer.

[0013] Active noise reduction technology refers to the active noise reduction control of the noise inside and outside the factory building by adopting a series of technical means, such as acoustic sensors, digital signal processors, etc. In the additive production area, since a lot of noise will be generated by equipment operation, material handling and other processes, it is particularly important to adopt active noise reduction technology. Active noise reduction and dust prevention are important links to ensure the safety of the production environment, employee health and product quality. Active noise reduction technology is developing rapidly, including: anti-phase interference technology, based on acoustic principles, to achieve noise reduction by emitting sound waves opposite to the original noise; adaptive filtering technology, based on digital signal processing principles, can achieve real-time noise reduction control; variable sound velocity technology, based on mechanical principles, to achieve noise reduction by changing the sound velocity.

[0014] Noise frequencies can be divided into low, medium and high frequencies. However, because low-frequency noise is different from high-frequency noise which will attenuate significantly with increasing distance and crossing obstacles, its decreasing speed is very slow and its sound wavelength is small. It can be transmitted over long distances and easily pass through obstacles such as walls to reach the human ear bones, which will cause chronic damage to various functions of the human body and may also cause mental and organic damage.

[0001] Zhang Xiaoqing and others published the research progress of designing sound-absorbing and noise-reducing structures based on metamaterials in the Journal of Tongji University. The article proposed that traditional porous materials can achieve sound absorption due to their microporous structure by converting sound energy into heat energy, and the thickness of the porous material can achieve sound absorption of the corresponding frequency when it is approximately equal to 1 / 4 of the wavelength of the sound wave. Therefore, it has a good sound absorption effect in the high-frequency range, but for sound waves below 500Hz, the material thickness can be increased to achieve a better sound absorption effect in the low-frequency range. It can be seen that the wedge-type sound insulation board material has been rapidly popularized, but in some scenarios, the noise reduction wall panel cannot be set too thick and there is also the problem of rough surface that is difficult to prevent dust and heat dissipation.

[0002] Source control is the first step to reduce noise. By optimizing equipment design, such as improving the transmission system, reducing component friction and collision, and selecting low-noise motors and bearings, noise generation can be fundamentally reduced. At the same time, choosing equipment with noise reduction functions, such as silent water pumps and fans, is also an effective means of reducing noise.

[0003] For noise sources such as airports, highways, industrial equipment or construction sites, sound insulation and sound absorption technologies are commonly used noise reduction methods. By setting up sound insulation barriers, such as soundproof covers and soundproof panels, the propagation of high- and medium-frequency noise can be effectively blocked. At the same time, installing sound-absorbing materials such as rock wool and glass wool on the walls and ceilings of the workshop can handle some of the medium- and low-frequency noise, converting sound waves into heat energy and reducing the reflection and propagation of sound waves.

[0004] For equipment that generates a lot of aerodynamic noise, such as fans and exhaust ports, muffler technology is an effective means of noise reduction. The muffler converts sound wave energy into heat or other forms of energy through internal structural design, thereby reducing the propagation of noise. Various types of mufflers have been developed in China, such as resistive mufflers, reactive mufflers and diffusion mufflers, which can be customized according to the characteristics of the equipment.

[0005] Equipment vibration is also an important cause of noise. By adopting vibration reduction measures such as vibration dampers and vibration pads, the vibration amplitude and frequency of the equipment can be reduced, thereby reducing the generation and spread of noise. Vibration reduction technology is not only applicable to mechanical equipment, but can also be used for vibration and noise control of structures such as buildings.

[0006] These active intervention solutions have undoubtedly begun to develop rapidly, and have even achieved excellent noise reduction effects in some specific cases. However, their shortcomings in the application field are also obvious. The main reason is that the available methods are limited, and due to the complex structure or the expensive key materials, it is not conducive to rapid industrial optimization. At the majority of applications, the noise reduction effect is still not obvious. Summary of the invention

[0007] The present invention proposes an active noise reduction and dust prevention curtain for production areas, which adopts mature industrial products and structures to realize the active noise reduction principle to solve the above-mentioned problems. It is suitable for popularization and promotion, and can greatly improve the noise reduction and dust prevention effects.

[0008] To this end, the present invention includes: a surface soft sound-absorbing and insulating film, a sub-surface buffer refractive diffusion net, a mesh piezoelectric film, an insulating thermally conductive insulation layer, a coupled current collecting and heat dissipating net and a heat dissipating buffer insulating substrate; the surface soft sound-absorbing and insulating film, the sub-surface buffer refractive diffusion net, the mesh piezoelectric film, the insulating thermally conductive insulation layer, the coupled current collecting and heat dissipating net and the heat dissipating buffer insulating substrate are stacked and fixed into a composite layer structure, and a partition insulating belt is sealed along the outer periphery of the insulating thermally conductive insulation layer and the coupled current collecting and heat dissipating net, and a heat dissipating and dust collecting edge guard is arranged around the partition insulating belt and the surface soft sound-absorbing and insulating film, the sub-surface buffer refractive diffusion net, the mesh piezoelectric film and the heat dissipating buffer insulating substrate. The average density gradually increases from the surface soft sound-absorbing film to the heat-dissipating buffer insulation substrate, and the core is to gradually enhance the absorption and conversion of low- and medium-frequency noise energy, taking into account the composite layer structure to gradually improve the barrier effect of reflection and refraction of medium- and high-frequency noise sound waves, absorb and eliminate noise energy in layers, balance and optimize the piezoelectric grounding and heat dissipation load, promote the surface dust prevention of the surface soft sound-absorbing film, and the overall structure is integrated into a noise attenuation and elimination energy-saving and low-consumption bearing system. The low- and medium-frequency noise received by the surface soft sound-absorbing film and dispersed by the sub-surface buffer refraction diffusion network, the noise sound wave signal data received by the mesh piezoelectric film controls the generation of vibrations with the same amplitude and frequency as the noise wave vibration but opposite phase, realizing real-time vibration suppression of the mesh piezoelectric film vibration components; the surface soft sound-absorbing film, the heat-dissipating buffer insulation substrate and the heat-dissipating dust-collecting edge guard adopt a sealed structure as a whole to avoid and reduce dust inhalation and accumulation.

[0009] Among them, the stacking relationship of the composite layer structure of the surface soft sound-absorbing and insulating film, the sub-surface buffer refractive diffusion net, the mesh piezoelectric film, the insulating thermal conductive insulation layer, the coupled current collector and heat dissipation net and the heat dissipation buffer insulating substrate is, from the surface to the inside, the surface soft sound-absorbing and insulating film, the sub-surface buffer refractive diffusion net, the coupled current collector and heat dissipation net, the insulating thermal conductive insulation layer, the mesh piezoelectric film and the heat dissipation buffer insulating substrate; or, the stacking relationship of the composite layer structure is, from the surface to the inside, the surface soft sound-absorbing and insulating film, the sub-surface buffer refractive diffusion net, the mesh piezoelectric film, the insulating thermal conductive insulation layer, the coupled current collector and heat dissipation net and the heat dissipation buffer insulating substrate.

[0010] The coupling collector heat dissipation net or mesh piezoelectric film is connected to an external power module through an insulating circuit through a partition insulation belt and a heat dissipation dust collection edge protection; the coupling collector heat dissipation net 5 is directly or through a power module to connect to the wiring terminal. Further, the wiring terminal is connected to an external light-emitting device, or a fluorescent exciton layer is set on the surface of the soft sound-absorbing and insulating film 1 or the heat dissipation and dust collection edge protection.

[0011] The capacitor grounding module is connected to the edge of the coupled current collecting and heat dissipating net or the mesh piezoelectric film through a resistor module, and the capacitor grounding module is externally connected through an insulating circuit through a partition insulating belt and a heat dissipating and dust collecting edge guard.

[0012] The thickness settings of the surface soft sound-absorbing and insulating film 1, the sub-surface buffer refractive diffusion network, the mesh piezoelectric film, the insulating thermally conductive insulation layer, the coupled current collector and heat dissipation network, and the heat dissipation buffer insulating substrate include uniform and equal thickness layer by layer, or the sub-surface buffer refractive diffusion network, the surface soft sound-absorbing and insulating film, the mesh piezoelectric film, the coupled current collector and heat dissipation network, the heat dissipation buffer insulating substrate, and the insulating thermally conductive insulation layer from thick to thin, that is, the sub-surface buffer refractive diffusion network is the thickest and the insulating thermally conductive insulation layer is the thinnest.

[0013] Furthermore, to achieve the above object, the present invention is configured as follows:

[0014] In particular, the mesh density of the piezoelectric film is smaller than that of the coupled collector and heat sink network, that is, the inscribed circle diameter of the mesh of the piezoelectric film is larger than the inscribed circle diameter of the mesh of the coupled collector and heat sink network.

[0015] In particular, the mesh piezoelectric film and the coupled collector and heat sink network are single-layer structures; or, the mesh piezoelectric film or the coupled collector and heat sink network are multi-layer structures of at least two layers.

[0016] In particular, an electrostatic parasitic coupling structure is formed between the mesh piezoelectric film-insulating thermal conductive barrier-coupled current collecting and heat dissipating network.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By setting up a high, medium and low frequency noise sequential mixed noise reduction and elimination structure, and adopting a composite absorption, refraction, piezoelectric conversion, grounding and heat dissipation integrated structure, it can quickly respond to changes in high, medium and low frequency noise, with a fast response speed, and achieve real-time active noise reduction. Under the constraint of controlling limited thickness, it integrates higher noise blocking, noise absorption, heat dissipation and dust prevention functions. The manufacturing and maintenance costs are easy to control and the service life is long. The coordinated dustproof performance is reasonably improved at the same time, and the noise reduction effect is greatly improved, which is more stable and safe. It can work in a wide band and high frequency range; it is environmentally friendly and energy-saving, with a stable structure, high energy conversion efficiency and corrosion resistance. It is especially suitable for acoustic control projects such as noise reduction and sound absorption in open or closed spaces in production areas, and even meets the needs of underwater sonar stealth work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following drawings are for illustration only and should not be construed as limiting the present invention in any way. By referring to the following drawings, readers can understand the embodiments of the present invention and further understand the advantages and technical features of the present invention.

[0020] Figure 1 It is a schematic diagram of the structure, local connections and cross-section of Example 1 of the present invention.

[0021] Figure 2 This is a schematic diagram of the local layered structure of the edge of Example 1 of the present invention.

[0022] Reference numerals include:

[0023] 1- surface soft sound-absorbing and insulating film, 2- sub-surface buffer refractive diffusion network, 3- mesh piezoelectric film, 4- insulating thermal conductive insulation layer, 5- coupled collector and heat dissipation network, 6- heat dissipation buffer insulating substrate, 7- partition insulating tape, 8- heat dissipation and dust collection edge protection, 9- wiring terminals, 10- power module, 11- resistance module, 12- capacitor grounding module. DETAILED DESCRIPTION

[0025] It should be noted that:

[0026] In the description of the present invention, the terms "including" and "having" and any of their variations are intended to cover other possible choices under the same logic that are not listed; the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the invention product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. It should also be noted that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0027] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those generally understood by those of ordinary skill in the art to which the present invention belongs. When there is a conflict, the definitions in this specification shall prevail.

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, rather than all embodiments.

[0029] After research, it was found that the propagation state of high, medium and low frequency noise and their mechanism of harm to human body are different; most high and medium frequency noise will be greatly attenuated during the propagation process with the obstruction of physical barriers, just as the isolation mesh or shell set around large electromechanical equipment or highways can achieve significant noise reduction effect, while medium and low frequency noise is easier to jump over obstacles and propagate farther, and it is difficult to use partition structure to block and reduce noise. The long-term damage of low frequency noise to human body, electromechanical equipment and building structure is more prominent. The more effective method of reducing low frequency noise is to add absorption, but high, medium and low frequency noises are difficult to absorb, and the elimination of electricity or heat caused by noise absorption is still a problem. Due to vibration fatigue, energy absorption and heat generation caused by noise excitation, the effect of noise-proof materials will accelerate degradation. Among them, the dust accumulation on the surface and pores formed naturally or by electric action during long-term work has aggravated the impact. Therefore, there are four aspects that are difficult to take into account in the existing technology: first, it is necessary to adapt to the absorption and isolation of high, medium and low frequency noise at the same time; second, it is necessary to take into account both sound absorption and noise reduction and dust prevention and removal; third, it is necessary to take into account the absorption and degradation of low frequency noise and insulation and heat dissipation; fourth, it is necessary to integrate higher noise blocking, noise absorption, heat dissipation and dust prevention under the constraint of controlling limited thickness.

[0030] In this technical field, active noise reduction technology begins to use the piezoelectric effect to actively control noise reduction. It involves the application of new materials such as piezoelectric fibers and linear piezoelectric ceramics. The piezoelectric effect refers to the fact that when certain specific materials are subjected to mechanical stress, electric charges will be generated on the surface, thereby forming a voltage. The first mode is the direct piezoelectric effect. When a piezoelectric material is subjected to an external force (such as pressure or tension), the deformation of its internal crystal structure will cause the redistribution of charges, thereby generating a voltage across the material. This effect is often used to make sensors and power generation equipment. For example, it is used to detect pressure changes or convert mechanical energy into electrical energy. The second mode is the inverse piezoelectric effect. In contrast to the direct piezoelectric effect, when a voltage is applied to a piezoelectric material, the material undergoes physical deformation. This effect is widely used in precision control systems such as precision drives and acoustic vibrators. The inverse piezoelectric effect allows materials to produce precise mechanical motion under the control of electrical signals. For example, the piezoelectric fibers used in sound insulation silk rely on the inverse piezoelectric effect. When sound waves in the environment excite piezoelectric fibers, these fibers can convert the sound wave energy into electrical signals, and then generate relative mechanical vibrations through the inverse piezoelectric effect, emitting reverse sound waves to offset the original noise, thereby achieving efficient noise control.

[0031] The crystal structure of piezoelectric materials is non-centrosymmetric, which makes their lattices easily shift under the action of external forces, thereby accumulating charges on their surfaces. Ceramic piezoelectric materials have excellent piezoelectric properties, but they are brittle and difficult to process into complex shapes, while polymer piezoelectric materials have good plasticity and processability.

[0032] Piezoelectric materials play an important role in active noise reduction. Piezoelectric materials have a piezoelectric effect, that is, when subjected to external force, they will generate electric charge; conversely, when subjected to an electric field, they will deform. This property enables piezoelectric materials to be used as sensors and actuators. In active noise reduction systems, piezoelectric materials are usually used as sensors to collect vibration or noise signals, and then transmit these signals to the control system. After processing these signals, the control system generates corresponding control signals, and then outputs sound waves opposite to the noise through the piezoelectric actuator, thereby achieving noise reduction.

[0033] An unknown lightweight film-type acoustic metamaterial is said to be found to absorb up to 99% of incident sound waves at several resonant frequencies below 1000 Hz. However, the sound insulation effect of current acoustic metamaterial structural sound insulation devices is relatively limited.

[0034] The present invention selects appropriate active noise reduction technology methods according to different noise sources and noise characteristics, reasonably arranges and designs the noise reduction system, and reasonably combines and configures various noise reduction functional components to form a complete noise reduction system. The principle of the embodiment lies in two aspects;

[0035] First, the average density gradually increases from the surface soft sound-absorbing and insulating film 1 to the heat-dissipating and buffering insulating substrate 6, and a system is established with the core of gradually enhancing the absorption and conversion of medium and low-frequency noise energy, taking into account the composite layer structure to gradually improve the barrier effect of reflection and refraction of medium and high-frequency noise sound waves, absorb and eliminate noise energy in layers, balance and optimize piezoelectric grounding and heat dissipation loads, and is also beneficial to dust prevention on the surface of the surface soft sound-absorbing and insulating film 1, so that the overall structure is integrated into an energy-saving and low-consumption bearing system for noise elimination.

[0036] Second, the mesh piezoelectric film 3 has a high electromechanical coupling coefficient, that is, high conversion efficiency; it has good sensitivity and resolution; it can be adaptively adjusted according to different noise environments to achieve the best noise reduction effect. The low- and medium-frequency noise received by the surface soft sound-absorbing and insulating film 1 and dispersed by the sub-surface buffering refractive diffusion network 2 reaches the mesh piezoelectric film 3, and the sound wave signal data received by the mesh piezoelectric film 3 controls the generation of vibrations with the same amplitude and frequency as the noise wave vibrations but opposite phases, thereby achieving real-time vibration suppression of the vibration components of the mesh piezoelectric film 3 and achieving the purpose of active noise reduction.

[0037] In the present invention, in addition, corresponding to the dust prevention measures, a large amount of dust is usually generated in the application scenarios and working processes. These dusts will not only pollute the environment, but also cause damage to personnel and equipment. Therefore, it is very important to take effective dust prevention measures. In particular, from the surface soft sound-absorbing and insulating film 1 to the heat dissipation buffer insulating substrate 6, the whole adopts a sealed structure to avoid and reduce dust inhalation and aggregation. Furthermore, the surface soft sound-absorbing and insulating film 1 to the heat dissipation buffer insulating substrate 6 is combined with increased humidity control, which is also easy to prevent and remove dust.

[0038] The present invention comprises: a surface soft sound-absorbing and sound-insulating film 1, a sub-surface buffer refractive diffusion net 2, a mesh piezoelectric film 3, an insulating heat-conducting insulation layer 4, a coupled current collector and heat-dissipating net 5, a heat-dissipating buffer insulating substrate 6, a partitioned insulating belt 7 and a heat-dissipating edge guard 8. The surface soft sound-absorbing and sound-insulating film 1, the sub-surface buffer refractive diffusion net 2, the mesh piezoelectric film 3, the insulating heat-conducting insulation layer 4, the coupled current collector and heat-dissipating net 5 and the heat-dissipating buffer insulating substrate 6 are laminated and compositely arranged; the partitioned insulating belt 7 and the heat-dissipating edge guard 8 are arranged around them.

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] The content of the present invention can be more easily understood by referring to the following preferred implementation methods of the present invention and the included examples.

[0041] Embodiment 1: As attached Figure 1 , 2 As shown, a heat dissipation and dust collection edge guard 8 is arranged on the periphery of the composite layer structure of the surface soft sound-absorbing and insulating film 1, the sub-surface buffer refractive diffusion net 2, the mesh piezoelectric film 3, the insulating thermal conductive insulation layer 4, the coupled collector heat dissipation net 5 and the heat dissipation buffer insulation substrate 6. Partition insulation belts 7 are arranged along the periphery of the insulating thermal conductive insulation layer 4 and the coupled collector heat dissipation net 5 for sealing, and heat dissipation and dust collection edge guards 8 are arranged on the periphery of the partition insulation belt 7 and the surface soft sound-absorbing and insulating film 1, the sub-surface buffer refractive diffusion net 2, the mesh piezoelectric film 3 and the heat dissipation buffer insulation substrate 6.

[0042] Among them, the superposition relationship of the composite layer structure of the surface soft sound-absorbing and insulating film 1, the sub-surface buffer refractive diffusion net 2, the mesh piezoelectric film 3, the insulating thermal conductive insulation layer 4, the coupled current collector and heat dissipation net 5 and the heat dissipation buffer insulating substrate 6 is, from the surface to the inside, the surface soft sound-absorbing and insulating film 1, the sub-surface buffer refractive diffusion net 2, the coupled current collector and heat dissipation net 5, the insulating thermal conductive insulation layer 4, the mesh piezoelectric film 3 and the heat dissipation buffer insulating substrate 6; or, the superposition relationship of the composite layer structure is, from the surface to the inside, the surface soft sound-absorbing and insulating film 1, the sub-surface buffer refractive diffusion net 2, the mesh piezoelectric film 3, the insulating thermal conductive insulation layer 4, the coupled current collector and heat dissipation net 5 and the heat dissipation buffer insulating substrate 6.

[0043] Furthermore, an external power module 10 is connected to one side edge of the coupled collector and heat dissipation network 5 through an insulating circuit through the partition insulating tape 7 and the heat dissipation and dust collection edge guard 8, and the coupled collector and heat dissipation network 5 is connected to the wiring terminal 9 directly or through the power module 10.

[0044] Furthermore, the capacitor grounding module 12 is connected to the edge of the coupled collector and heat dissipation network 5 through the resistor module 11, and the capacitor grounding module 12 is externally connected through the partition insulation belt 7 and the heat dissipation and dust collection edge guard 8 through the insulation circuit.

[0045] Furthermore, the power module 10 and the connection terminal 9 are disposed at positions where the resistor module 11 and the capacitor grounding module 12 are disposed, respectively, on the opposite side edges of the coupled collector and heat dissipation network 5 .

[0046] In the embodiment of the present invention, the thickness setting of the surface soft sound-absorbing and insulating film 1, the sub-surface buffer refractive diffusion net 2, the mesh piezoelectric film 3, the insulating thermally conductive insulation layer 4, the coupled current collecting and heat dissipating net 5, and the heat dissipating buffer insulating substrate 6 includes uniform and equal thickness layer by layer, or the sub-surface buffer refractive diffusion net 2, the surface soft sound-absorbing and insulating film 1, the mesh piezoelectric film 3, the coupled current collecting and heat dissipating net 5, the heat dissipating buffer insulating substrate 6, and the insulating thermally conductive insulation layer 4 from thick to thin, that is, the sub-surface buffer refractive diffusion net 2 is the thickest, and the insulating thermally conductive insulation layer 4 is the thinnest.

[0047] In the embodiment of the present invention, the mesh density of the mesh piezoelectric film 3 is smaller than that of the coupled collector and heat sink network 5 , that is, the mesh inscribed circle diameter of the mesh piezoelectric film 3 is larger than the mesh inscribed circle diameter of the coupled collector and heat sink network 5 .

[0048] In the embodiment of the present invention, the mesh holes of the mesh piezoelectric film 3 and the mesh holes of the coupled current collecting and heat dissipating mesh 5 are circular, triangular or polygonal structures.

[0049] In the embodiment of the present invention, preferably, the mesh piezoelectric film 3 and the coupled collector and heat sink network 5 are single-layer structures; further, the mesh piezoelectric film 3 or the coupled collector and heat sink network 5 are multi-layer structures of at least two layers.

[0050] Preferably, the surface soft sound-absorbing and insulating film 1 is a polydimethylsiloxane (PDMS) soft microporous protective film.

[0051] Preferably, the surface soft sound-absorbing and insulating film 1 is a polyester fiber sound-absorbing cloth, the sub-surface buffering refractive diffusion net 2 is a PC sound insulation net or a fiberglass sound insulation net, the mesh piezoelectric film 3 is a micro-nano fiber cloth or a piezoelectric ceramic net with a network structure, the insulating and thermally conductive insulation layer 4 is a single-component room temperature vulcanized silicone adhesive, and the coupled current collector and heat dissipation net 5 is a conductive fiber net.

[0052] The micro-nano fiber cloth with a network structure is made by alternately spinning the first warp, the second warp, the first weft and the second weft, using mixed electrostatic spinning technology. The raw material of the first warp is sulfur heterocyclic polymer spinning, the second warp is modified sulfur heterocyclic polymer spinning, the first weft is PVDF spinning, and the second weft is modified PVDF spinning; the modified sulfur heterocyclic polymer is a sulfur heterocyclic polymer modified by an inorganic thermal conductive filler; the modified PVDF is PVDF and a soft magnetic material mixed in a mass ratio of 1:1-1.2. The technical details are from patent document CN 117306104A.

[0053] Among them, the surface soft sound-absorbing and insulating film 1 is made of polyester fiber sound-absorbing cloth, which is hot-pressed and made in the shape of cocoon cotton to achieve density diversity to ensure ventilation, becoming an excellent product among sound-absorbing and heat-insulating materials. The highest sound absorption coefficient in the noise range of 125-4000HZ reaches more than 0.9, shortening and adjusting the reverberation time according to different needs, removing sound impurities, improving the sound effect, and improving the clarity of language. The product has the characteristics of heat preservation, flame retardancy, light weight, easy processing, stability, impact resistance, and simple maintenance; in addition, the surface soft sound-absorbing and insulating film 1 can also be made of or other porous materials. The sound absorption coefficient increases with the increase of frequency. The high-frequency sound absorption coefficient is very large. The cavity left on the back and the spatial sound-absorbing body formed by it can greatly improve the sound absorption performance of the material. The noise reduction coefficient is roughly around 0.8-1.10, becoming a high-efficiency sound-absorbing body with a wide frequency band.

[0054] Among them, the heat dissipation buffer insulation substrate 6 can adopt a smooth polyester fiber sound-absorbing board, whose sound absorption coefficient increases with the increase of frequency, and the sound absorption coefficient of high frequency is very large. Leaving a cavity on the back can greatly improve the sound absorption performance of the material. The noise reduction coefficient is roughly around 0.8 to 1.10, making it a high-efficiency sound absorber with a wide frequency band. It has the characteristics of sound absorption, heat insulation and heat preservation, and the material is uniform and solid, elastic, tough, wear-resistant, impact-resistant, tear-resistant, and not easy to be scratched. Its board width is large (9×1220×2440㎜), which is suitable for various acoustic processing conditions. In addition, the material is light in weight, and after being damaged by impact, it will not produce fragments or pieces like some brittle materials, which are in danger of falling, and has higher safety.

[0055] In the embodiment of the present invention, the coupled collector and heat dissipation net 5 of the conductive fiber net is made of conductive fibers woven or coated, glued or hot pressed. Among them, the conductive fibers include metal fibers, carbon black fibers, conductive metal compound fibers and conductive polymer fibers. Metal fibers have good electrical conductivity, heat resistance and chemical corrosion resistance, but for textiles, metal fibers have low cohesion, poor spinning performance, and limited color of finished products. They are mostly used for carpets and work clothes fabrics, and are expensive when made into high-fineness fibers. Carbon black fibers are conductive fibers made by mixing carbon black with fiber-forming materials and using a skin-core spinning method. In addition to maintaining the original mechanical properties of the fiber, they also obtain certain electrical conductivity, but the color is single, usually black or gray-black, and they are subject to certain restrictions in use. Carbon fibers made of viscose, acrylic, and asphalt as raw fibers and treated with carbonization have good electrical conductivity, heat resistance, and chemical resistance, but have high modulus, lack toughness, are not resistant to bending, have no heat shrinkage ability, and have a limited scope of application. The carbon black is easy to fall off and feel bad when coated on the fiber surface by coating method. Moreover, the carbon black is not easy to be evenly distributed on the fiber surface. Conductive metal compound fiber is made of copper, silver, nickel and cadmium sulfide, iodide or oxide as conductive material by mixed spinning method, adsorption method or chemical reaction method. It has good fastness. Among them, copper and silver compounds also have certain additional functions, such as antibacterial and deodorizing. However, the cost of silver is relatively high, and the conductive fibers of copper, nickel and cadmium sulfide and iodide are inferior to carbon black fibers. The electromagnetic shielding performance is general and it is mainly used for antistatic. Among the conductive polymer fibers, organic conductive fibers made by direct spinning of polymer conductive materials such as polyacetylene, polyaniline, polypyrrole and polythiophene are difficult to spin, more expensive, and difficult to be widely used in textiles.

[0056] Conductive fibers can quickly leak and disperse the generated static electricity, effectively preventing the local accumulation of static electricity. Conductive fibers also have the ability to discharge corona, which can release static electricity into the atmosphere. Corona discharge is a discharge phenomenon that occurs when the curvature radius of the electrode surface is very small, the electric field in the discharge space is uneven, and the electric field near the electrode surface is relatively strong under atmospheric pressure or above. There is a luminous corona layer near the electrode, and the electric field in the layer is very strong, resulting in strong ionization and excitation. This corona discharge is an extremely weak discharge phenomenon and will not cause any danger. Therefore, conductive fibers can also be used to eliminate static electricity by corona discharge without being grounded. If the conductive fiber product contacts the ground, static electricity will also leak into the ground through conduction at the same time as the corona discharge, and the amount of electricity it carries will be even smaller.

[0057] The mesh piezoelectric film 3 or the coupled current collecting and heat dissipating net 5 made of conductive fibers is sensitive to electricity and heat, and has excellent functions of conducting electricity, conducting heat, shielding and absorbing electromagnetic waves.

[0058] In the embodiment of the present invention, the conductive fiber of the coupled collector and heat dissipation network 5 refers to chemical fiber or metal fiber, carbon fiber, etc. spun by mixing a conductive medium into a polymer. It has excellent performance in eliminating and preventing static electricity, which is much higher than that of antistatic fiber, and its specific resistance value remains unchanged and is basically not affected by humidity. According to the distribution state of the conductive component, it is divided into three types: uniform type, coated type and composite type. It is generally made by adding conductive media such as carbon black, graphite, metal powder or metal compound to the fiber by methods such as miscibility, evaporation, electroplating and composite spinning.

[0059] In this embodiment, the mesh piezoelectric film 3 may also be a conductive fiber mesh.

[0060] In this embodiment, the edge of the mesh piezoelectric film 3 is externally connected to a resistor module 11 and a capacitor grounding module 12 .

[0061] In this embodiment, after absorbing the noise that passes through the surface soft sound-absorbing film 1 and is reorganized by the sub-surface buffer refraction diffusion net 2, the mesh piezoelectric film 3-insulating heat-conducting insulation layer 4-coupled collector and heat-dissipating net 5 coupling structure produces an electrostatic effect, forming a parasitic coupled electrostatic field. When the static voltage exceeds the threshold, the trigger resistor module 11 and the capacitor grounding module 12 discharge to the ground through the heat dissipation dust collecting edge 8. At the same time, the layer structure also dissipates heat through the heat dissipation dust collecting edge 8 with excellent thermal conductivity, the surface soft sound-absorbing film 1 and the outer surface of the heat dissipation buffer insulating substrate 6. Quickly dissipate the energy carried by the noise.

[0062] Among them, parasitic coupling is usually a kind of electric field coupling that is desired to be avoided. For example, between two wirings on a printed circuit board, due to the existence of parasitic capacitance, the signal on one wiring will affect the signal on the other wiring through electric field coupling, that is, noise will be generated on the other wiring. Methods to reduce parasitic coupling include making the distance between wirings as far as possible, or adding ground wires or planes (Ground Planes) between two wirings that may affect each other. Breadboards are very sensitive to parasitic coupling because each device on the breadboard is connected by a very long metal strip, and the parasitic inductance between these metal strips can reach several picofarads (pF). At higher frequencies (such as tens of megahertz), it is usually necessary to add a ground plane to reduce the electric field coupling between different wires.

[0063] In this embodiment, a multi-layer composite structure with a density-differentiated integrated configuration is used to guide and plan the noise absorption path. Furthermore, the vibration and heat response that occurs simultaneously with the absorption and conversion of noise in the internal structure, as well as rapid piezoelectric conduction, grounding and heat dissipation, reduce noise leakage, improve the stability and durability of the system, and make more noise come in and less or even almost no noise come out, thereby enhancing the ideal effect of noise reduction, sound insulation and even silencing.

[0064] This embodiment can be developed into a rigid hard plate structure product or a soft product with elasticity or a certain flexibility. When used, it can be erected or covered on a supporting structure attached to the noise propagation path, a fixed building or the outer surface of equipment, or it can be set on the inner surface of equipment or buildings.

[0065] Furthermore, in this embodiment, the wiring terminal 9 can also be connected to an external light-emitting device, or a fluorescent exciton layer can be set on the surface of the soft sound-absorbing and insulating film 1 or the heat dissipation and dust collection edge 8 to indicate the piezoelectric working state. Among them, the fluorescent exciton layer is formed by the electron and hole pairs in the excited state combined together through Coulomb interaction. In some materials, these excitons can form a layer, namely the fluorescent exciton layer, under specific conditions. Fluorescent exciton layers usually appear in organic semiconductors, quantum dots, two-dimensional materials and other nanostructures. The electrons and holes in these materials can form excitons after being excited by light or electric fields. When these excitons gather together, they can form a continuous fluorescent exciton layer. The fluorescent exciton layer has high efficiency of photoluminescence and electroluminescence, high light absorption and light conversion efficiency, etc. The fluorescent exciton layer can improve the photoelectric conversion efficiency.

[0066] Embodiment 2:

[0067] In an embodiment of the present invention, the mesh piezoelectric film 3 is a piezoelectric fabric that can efficiently filter sound. This special fabric is made of piezoelectric fibers with a diameter between 40 and 90 microns (μm), that is, 0.04 to 0.09 millimeters (mm). The thickness of the fabric is about 0.02 to 0.12 mm, and when voltage is applied, the material excites subtle vibrations. After precise tuning, it can offset incoming ambient noise like active noise reduction. It is especially effective for small spaces. By applying voltage to make the fabric completely "still", it can become a sound barrier that can reflect sound back to the sound source like a mirror. After testing, the direct noise suppression mode similar to active noise reduction can reduce the sound volume by 65 decibels. In static mode, sound transmission drops by 75%.

[0068] Preferably, the surface soft sound-absorbing and insulating film 1 is a rubber or foam elastic layer, which is used to provide buffering and absorption when sound waves of different frequencies pass through. The sub-surface buffering refractive diffusion network 2 is a graphene or other polymer material damping layer, which is used to convert sound waves into heat energy, absorb and dissipate heat.

[0069] The implementation principle of this embodiment is: combined with a mesh piezoelectric film 3 to absorb noise and produce piezoelectric effect, eliminate noise energy, the sub-surface buffer refractive diffusion network 2 and the mesh piezoelectric film 3 are a mesh structure, combined with a microporous structure surface soft sound-absorbing and insulating film 1, an insulating thermal insulation layer 4 and a heat-dissipating buffer insulating substrate 6, the interior is filled with air, and air is also a good sound insulation material. When sound waves pass through, the energy of the sound waves will be reduced. Combined with the multi-layer mesh structure, differentiated tiny vibrations interfere with each other, and the frequency and amplitude of the noise sound waves are also offset, further optimizing the noise reduction function.

[0070] In the embodiment of the present invention, regarding the performance test of the composite layer structure, the sound absorption coefficient is measured according to GB / T18696.1-2004 "Measurement of sound absorption coefficient and acoustic impedance in impedance tubes"; the mechanical properties are measured according to GB / Z38434-2019 standard using a universal testing machine; and the thermal conductivity is measured with reference to GB / T11205-2009 standard.

[0071] Example 3: Based on the experimental findings that the heat dissipation dust collecting edge guard 8 is prone to absorb dust, it is conceivable that in this embodiment, the coupled electrostatic field structure formed based on the composite layer of the mesh piezoelectric film 3-insulating thermal conductive barrier 4-coupled collector and heat dissipation net 5 may simultaneously enhance the electrostatic dust removal effect of the overall composite layer structure. Since the coupled collector and heat dissipation net 5 has a resistance module 11-capacitor grounding module 12 grounding line that is dispersedly connected to the heat collecting dust collecting edge guard 8, during the noise reduction work, the electrostatic field also plays a role. The dust-containing gas is ionized when passing through the electrostatic field. After the dust particles combine with negative ions and carry negative charges, they tend to discharge and deposit on the anode surface, which is convenient for recovery and elimination. At the same time, it also indirectly plays a cleaning role on the surface of the soft sound-absorbing and insulating film 1.

[0072] Embodiment 4: The composite layer structure of the present invention can also be combined with a sound insulation net product to set up a comprehensive noise reduction system in the application, so as to achieve a more comprehensive, complete, efficient and energy-saving noise reduction and sound insulation effect. Even this system can be made into a large acoustic device that is easy to disassemble and assemble.

[0073] Among them, sound insulation nets can be divided into sound insulation type, sound absorption type and mixed type of sound barriers. The commonly used type is the mixed type of sound absorption and sound insulation. According to the form, the sound insulation net can be divided into two basic forms: arc shape and straight flat shape. Each form can be divided into multiple structural forms.

[0074] Embodiment 5: The composite layer structure of the present invention can be continuously improved in application, and simplified or transparentized into a single layer or even an overall structure of the surface soft sound-absorbing film 1, the sub-surface buffer refractive diffusion network 2, the mesh piezoelectric film 3, the insulating thermal insulation layer 4, the coupled current collection and heat dissipation network 5, and the heat dissipation buffer insulating substrate 6.

[0075] At the same time, in order to meet the needs of the segmented market, the overall plane structure of the multi-layer structure can be divided into regions, which are separated and connected by partition insulation belts 7 or heat dissipation and dust collection protective edges 8.

[0076] Embodiment 6: The composite layer structure of the present invention can be applied to controllable processing scenarios of sonar detection on land or underwater in specific scenarios. The amplification circuit or the noise reduction processing circuit is connected through the terminal 9, including the noise reduction processing circuit can generate an anti-phase sound wave equal to the noise, thereby neutralizing and offsetting the external noise to achieve the effect of active noise reduction.

[0077] The speed of sound in air at 20°C is about 340 m / s. The speed of sound in water at 20°C is about 1500 m / s. The speed of sound depends on factors such as the density, elasticity and temperature of the medium. The distance between water molecules is smaller than that between molecules in air, and the interaction between water molecules is stronger, which allows sound waves to transfer energy faster when propagating in water.

[0078] In this embodiment, the interior of the composite layer structure is inflated and the surface is sealed and coated, and then placed underwater. The heat generated by vibration and sound absorption and the charge generated by the piezoelectric effect can be easily converted into beneficial energy for utilization, thereby achieving better sound absorption and sound insulation effects.

[0079] Based on the above embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention, so as to avoid exhaustively listing all implementation methods that are unnecessary and impossible to list comprehensively.

Claims

1. An active noise reduction and dustproof curtain for production areas, comprising a surface soft sound-absorbing and sound-insulating film (1), a sub-surface buffer refractive diffusion net (2), a mesh piezoelectric film (3), an insulating heat-conducting insulation layer (4), a coupled current collection and heat dissipation net (5) and a heat dissipation buffer insulating substrate (6); characterized in that: A surface soft sound-absorbing and insulating film (1), a sub-surface buffer refractive diffusion net (2), a mesh piezoelectric film (3), an insulating heat-conducting insulating layer (4), a coupled current-collecting and heat-dissipating net (5) and a heat-dissipating and buffering insulating substrate (6) are laminated and fixed to form a composite layer structure; a partition insulating belt (7) is provided along the outer periphery of the insulating heat-conducting insulating layer (4) and the coupled current-collecting and heat-dissipating net (5) for sealing; and a heat-dissipating and dust-collecting edge guard (8) is provided around the partition insulating belt (7) and the surface soft sound-absorbing and insulating film (1), the sub-surface buffer refractive diffusion net (2), the mesh piezoelectric film (3) and the heat-dissipating and buffering insulating substrate (6). The average density gradually increases from the surface soft sound-absorbing and insulating film (1) to the heat-dissipating and buffering insulating substrate (6), and the core is to gradually enhance the absorption and conversion of medium and low frequency noise energy, while taking into account the composite layer structure to gradually improve the barrier effect of reflection and refraction of medium and high frequency noise sound waves, absorb and eliminate noise energy in layers, balance and optimize piezoelectric grounding and heat dissipation loads, promote dust prevention on the surface of the surface soft sound-absorbing and insulating film (1), and the overall structure is integrated into a noise attenuation and elimination energy-saving and low-consumption bearing system. The medium and low frequency noise received by the surface soft sound-absorbing and insulating film (1) and dispersed by the sub-surface buffering and refractive diffusion network (2), the noise sound wave signal data received by the mesh piezoelectric film (3) controls the generation of vibrations with the same amplitude and frequency as the noise wave vibration but opposite phase, so as to achieve real-time vibration suppression of the vibration components of the mesh piezoelectric film (3); the outer surface of the surface soft sound-absorbing and insulating film (1), the heat-dissipating and buffering insulating substrate (6) and the heat-dissipating and dust-collecting edge guard (8) adopts a sealing structure as a whole to avoid and reduce dust inhalation and accumulation.

2. The active noise reduction and dustproof curtain for production areas according to claim 1 is characterized in that: In the composite layer structure, the stacking relationship of the surface soft sound-absorbing and insulating film (1), the sub-surface buffer refractive diffusion net (2), the mesh piezoelectric film (3), the insulating thermally conductive insulation layer (4), the coupled current collecting and heat dissipating net (5) and the heat dissipating and buffering insulating substrate (6) is, from the outside to the inside, the surface soft sound-absorbing and insulating film (1), the sub-surface buffer refractive diffusion net (2), the coupled current collecting and heat dissipating net (5), the insulating thermally conductive insulation layer (4), the mesh piezoelectric film (3) and the heat dissipating and buffering insulating substrate (6).

3. The active noise reduction and dustproof curtain for production areas according to claim 1 is characterized in that: In the composite layer structure, the stacking relationship of the surface soft sound-absorbing and insulating film (1), the sub-surface buffer refractive diffusion net (2), the mesh piezoelectric film (3), the insulating thermal conductive insulation layer (4), the coupled current collecting and heat dissipating net (5) and the heat dissipating and buffering insulating substrate (6) is, from the outside to the inside, the surface soft sound-absorbing and insulating film (1), the sub-surface buffer refractive diffusion net (2), the mesh piezoelectric film (3), the insulating thermal conductive insulation layer (4), the coupled current collecting and heat dissipating net (5) and the heat dissipating and buffering insulating substrate (6).

4. The active noise reduction and dustproof curtain for production areas according to claim 1 is characterized in that: An external power module (10) is connected to one side edge of the coupled collector and heat dissipation net (5) or the mesh piezoelectric film (3) through an insulating circuit, through a partition insulating tape (7) and a heat dissipation and dust collection edge guard (8); the coupled collector and heat dissipation net (5) is connected to a wiring terminal (9) directly or through the power module (10).

5. The active noise reduction and dustproof curtain for production areas according to claim 1 is characterized in that: The capacitor grounding module (12) is connected to the edge of the coupled current collecting and heat dissipating network (5) or the mesh piezoelectric film (3) through a resistor module (11), and the capacitor grounding module (12) is externally connected through an insulating circuit passing through a partition insulating tape (7) and a heat dissipating and dust collecting edge guard (8).

6. The active noise reduction and dustproof curtain for production areas according to claim 1 is characterized in that: The thickness of the surface soft sound-absorbing and insulating film (1), the sub-surface buffer refractive diffusion net (2), the mesh piezoelectric film (3), the insulating heat-conducting insulation layer (4), the coupled current collecting and heat-dissipating net (5), and the heat-dissipating buffer insulating substrate (6) may be set to be uniform and equal layer by layer, or the sub-surface buffer refractive diffusion net (2), the surface soft sound-absorbing and insulating film (1), the mesh piezoelectric film (3), the coupled current collecting and heat-dissipating net (5), the heat-dissipating buffer insulating substrate (6), and the insulating heat-conducting insulation layer (4 ...

7. The active noise reduction and dustproof curtain for production areas according to claim 1 is characterized in that: The mesh density of the mesh piezoelectric film (3) is smaller than that of the coupled current collecting and heat dissipating network (5), that is, the mesh inscribed circle diameter of the mesh piezoelectric film (3) is larger than the mesh inscribed circle diameter of the coupled current collecting and heat dissipating network (5).

8. The active noise reduction and dustproof curtain for production areas according to claim 1 is characterized in that: The mesh piezoelectric film (3) and the coupled current collecting and heat dissipating network (5) are single-layer structures; or are multi-layer structures of at least two layers.

9. The active noise reduction and dustproof curtain for production areas according to claim 1, characterized in that: The composite layer of the mesh piezoelectric film (3) - the insulating heat-conducting barrier layer (4) - the coupled current collecting and heat-dissipating network (5) forms an electrostatic parasitic coupling structure.

10. The active noise reduction and dustproof curtain for production areas according to claim 4, characterized in that: A fluorescent exciton layer is arranged on the surface of the soft sound-absorbing and insulating film (1) or the heat-dissipating and dust-collecting edge protection (8).

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