CN221001484U

CN221001484U - Sound-absorbing heat-insulating layer

Info

Publication number: CN221001484U
Application number: CN202322037720.2U
Authority: CN
Inventors: 陈迪飞; 李向东; 丁利斌; 蔡海洋
Original assignee: Shenzhen Maxima Decoration Group Co ltd
Current assignee: Shenzhen Maxima Decoration Group Co ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-05-24
Anticipated expiration: 2033-07-31

Abstract

The application provides a sound absorbing protective layer, comprising: a first sound-absorbing layer; the second sound absorption layer is adhered to the side surface of the first sound absorption layer; the heat insulation layer is provided with a first surface and a second surface which are oppositely arranged, the first surface is attached to the first sound absorption layer, and the second surface is attached to the second sound absorption layer; wherein, the vacuum cavity is seted up to the heat preservation for separate indoor outer temperature. The sound-absorbing heat-insulating layer is formed into a comprehensive solution by tightly combining the first sound-absorbing layer and the second sound-absorbing layer with the heat-insulating layer; and the heat preservation layer is provided with a vacuum cavity for isolating indoor and outdoor temperatures. The application of the vacuum cavity can effectively block heat conduction and convection, so that the heat insulation performance of the wall body is improved. Such a vacuum chamber design can significantly improve the thermal insulation effect. The limitation of the prior art scheme is solved.

Description

Sound-absorbing heat-insulating layer

Technical Field

The application relates to the field of building materials, in particular to a sound-absorbing heat-insulating layer.

Background

Along with the increasing demands of people on indoor environment comfort and energy conservation, sound absorption and heat preservation technology plays an important role in indoor buildings. Conventional indoor wall surfaces and partition walls are usually made of common building materials, such as brick walls, concrete and the like, and have poor sound absorption capacity, so that noise and echo problems are easily generated indoors. Meanwhile, the heat conduction performance of the wall is limited, so that the problems of energy loss and energy waste exist. Therefore, development of a sound-absorbing heat-insulating layer with good sound-absorbing effect and excellent heat-insulating performance becomes an urgent need of the current building industry.

At present, various sound absorbing and heat insulating materials have been used in indoor construction. In terms of sound absorption, materials such as sound absorbing sponge, polyurethane foam, mineral wool and the like are widely used, and they can effectively absorb indoor sound and improve indoor acoustic environment. In terms of heat preservation, some high-insulation materials such as aerogel, polyimide foam and the like are used for improving the heat preservation performance of the wall body and reducing energy loss. However, most of the current sound absorbing and insulating materials are usually applied separately, and a comprehensive solution is lacking to meet the sound absorbing and insulating requirements at the same time.

Although conventional sound absorbing materials can improve the acoustic environment in a room, they have limited improvements in heat insulating properties. While some high-insulation heat-preservation materials can improve the heat preservation performance of the wall body, the absorption effect of indoor sound is poor. This results in the need for both sound absorbing and insulating materials in some applications, adding to construction complexity and cost. Therefore, a novel sound-absorbing heat-insulating layer is needed, the sound-absorbing effect and the heat-insulating performance can be comprehensively considered, and the indoor and outdoor temperatures are separated by utilizing the vacuum cavity, so that the overall sound-absorbing and heat-insulating effects are improved, and the limitation of the prior art scheme is solved.

Disclosure of utility model

In view of the above, there is a need to provide a sound-absorbing cover sheet structure having good sound-absorbing and heat-insulating properties to solve the above-mentioned problems.

An embodiment of the present application provides a sound absorbing protective layer for indoor design, including:

a first sound-absorbing layer;

the second sound absorption layer is adhered to the side surface of the first sound absorption layer;

The heat insulation layer is provided with a first surface and a second surface which are oppositely arranged, the first surface is attached to the first sound absorption layer, and the second surface is attached to the second sound absorption layer;

Wherein, the vacuum cavity is seted up to the heat preservation for separate indoor outer temperature.

In at least one embodiment of the present application, the first sound absorbing layer and the second sound absorbing layer are sound absorbing sponges.

In at least one embodiment of the present application, the insulating layer material is high strength stainless steel.

In at least one embodiment of the present application, the vacuum chamber is a hollow insulation layer, and the hollow insulation layer is obtained by pumping air therein.

In at least one embodiment of the present application, the first sound absorbing layer and the second sound absorbing layer have different sound absorbing frequency ranges.

In at least one embodiment of the present application, a sealing layer is disposed between the first sound absorbing layer, the second sound absorbing layer and the heat insulating layer, and the sealing layer is made of an elastic material and is used for ensuring the sealing performance of the vacuum cavity.

In at least one embodiment of the application, the vacuum chamber is located within the insulating layer and is defined by the first and second sides of the insulating layer.

In at least one embodiment of the present application, the first sound absorbing layer, the second sound absorbing layer and the heat insulating layer are fixedly connected by means of an adhesive or pressing.

In at least one embodiment of the present application, the thermal insulation layer has a thickness twice that of the first sound absorbing layer and the second sound absorbing layer.

In at least one embodiment of the present application, the sound absorbing layer is provided with grooves.

The sound-absorbing heat-insulating layer is formed into a comprehensive solution by tightly combining the first sound-absorbing layer and the second sound-absorbing layer with the heat-insulating layer; and the heat preservation layer is provided with a vacuum cavity for isolating indoor and outdoor temperatures. The application of the vacuum cavity can effectively block heat conduction and convection, so that the heat insulation performance of the wall body is improved. The vacuum cavity is in a high vacuum state, so that heat conduction and heat radiation are reduced, and the change of indoor temperature is effectively slowed down. The scheme can obviously improve the heat preservation effect. The limitation of the prior art scheme is solved.

Drawings

Fig. 1 is a perspective view of a sound absorbing and insulating layer 100 according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of the insulation 30 of fig. 1.

Description of the main reference signs

100. A sound-absorbing heat-insulating layer; 10. a first sound-absorbing layer; 20. a second sound-absorbing layer; 21. a groove; 30. a heat preservation layer; 31. a vacuum chamber; 40. a sealing layer; 50. an adhesive layer.

Detailed Description

Embodiments of the present application will now be described with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application.

It is noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like are used herein for illustrative purposes only.

The application provides a sound-absorbing heat-insulating layer 100, which is used for being installed indoors and comprises: a first sound-absorbing layer 10, a second sound-absorbing layer 20 and a heat-insulating layer 30. A second sound-absorbing layer 20 attached to the side surface of the first sound-absorbing layer 10; a heat insulating layer 30 having a first surface (not shown) and a second surface (not shown) disposed opposite to each other, the first surface (not shown) being bonded to the first sound absorbing layer 10, and the second surface (not shown) being bonded to the second sound absorbing layer 20;

wherein, the heat preservation layer 30 is provided with a vacuum cavity 31 for isolating indoor and outdoor temperatures. (the format of the description is not inconsistent with the claims and is preferably made in one piece)

Specifically, the first sound-absorbing layer 10 is a first layer composition portion of the sound-absorbing and heat-insulating layer 100, and mainly absorbs indoor sound. When the sound wave reaches the sound absorbing layer, it passes through the material, causing particles inside the material to vibrate, thereby converting the sound energy into thermal energy, causing the sound wave energy to be absorbed and split. This will help reduce echo and noise in the room, creating a more comfortable and quiet environment.

Further, the second sound-absorbing layer 20 is located at a side of the first sound-absorbing layer 10 and is attached thereto. The sound absorbing layer functions similarly to the first sound absorbing layer 10, which increases the sound absorbing effect so that more sound wave energy is absorbed and removed.

Still further, the insulating layer 30 is a third component of the present solution, and functions to block the indoor and outdoor temperatures. The heat preservation layer 30 is made of stainless steel, so that indoor heat is effectively prevented from being dissipated outdoors, and cold air enters the indoor space. This helps to maintain the temperature in the room stable, reduce energy consumption, and improve energy efficiency.

Further, the heat insulation layer 30 has a vacuum chamber 31, and the vacuum chamber 31 is a space between two surfaces without air, so as to form a vacuum state. Vacuum is an excellent insulator because it allows heat energy to be transferred by convection and breathing through the vacuum chamber 31 provided in the insulation layer 30, and heat transfer between the inside and the outside of the room is effectively isolated, thereby improving the insulation performance of the insulation layer 30.

In summary, when the sound wave enters the room, a part of the sound energy is absorbed by the first sound absorbing layer 10, and the intensity of the sound is divided. Then, through further absorption and division of the second sound-absorbing layer 20, the noise in the room is significantly reduced, creating a quiet environment. Meanwhile, the heat insulation layer 30 effectively prevents the dissipation of indoor heat by isolating the vacuum chamber 31 with indoor and outdoor temperatures, maintains the indoor temperature stable, and reduces the inside of a heating or refrigerating system.

The scheme can be used for basements and heat preservation inside buildings, such as indoor spaces of family houses, office school buildings, hotels and the like. In addition, the technical scheme can also be used for industrial equipment to reduce working noise and energy dust collection. Such a sound absorbing insulation 100 will play an important role in any scenario where it is desirable to implement insulation 30 simultaneously.

In a specific embodiment, the first sound-absorbing layer 10 and the second sound-absorbing layer 20 are sound-absorbing sponges. The sound-absorbing sponge is a material with good sound-absorbing performance, and the tiny pores and the porous structure of the sound-absorbing sponge can effectively absorb the energy of sound waves, reduce indoor noise and improve the quality of acoustic environment. The use of the sound absorbing sponge as the sound absorbing layer of the sound absorbing and insulating layer 100 can more effectively suppress the propagation of sound waves, improve the indoor acoustic effect, reduce the noise level, and provide more comfortable living and working environments for users.

Further, when sound waves are generated in the room, the sound waves are propagated to the sound-absorbing and heat-insulating layer 100. The first sound-absorbing layer 10 and the second sound-absorbing layer 20 are used as sound-absorbing sponge materials, and can absorb the energy of sound waves rapidly, so that the vibration energy of the sound waves is converted into tiny heat energy and dissipated in the material through the pore structure, and the reflection and propagation of the sound waves are reduced. Thus, the sound absorbing sponge layer can effectively lighten the intensity of sound and reduce the indoor noise level.

In summary, since the sound-absorbing heat-insulating layer 100 has good sound-absorbing performance, it is suitable for various indoor environments, especially for places requiring high acoustic requirements. For example, in a concert hall, a recording studio, a conference room, a theater, a library, etc. where a good acoustic effect is required, the sound absorbing and insulating layer 100 can help reduce noise and enhance sound quality and acoustic experience. In addition, it can also be used for interior partitions of residential buildings, stairwells, bedrooms, etc., to provide a more calm and pleasant living environment. Therefore, the sound-absorbing and heat-insulating layer 100 is a functional material widely applied to different indoor places, and creates better living and working environments for users.

In a specific implementation, the sound-absorbing heat-insulating layer 100 further includes two sealing layers 40, one sealing layer 40 is disposed between the first sound-absorbing layer 10 and the heat-insulating layer 30, and the other sealing layer 40 is disposed between the second sound-absorbing layer 20 and the heat-insulating layer 30.

Specifically, the sound-absorbing insulation layer 100 includes two sealing layers 40 in addition to the first sound-absorbing layer 10, the second sound-absorbing layer 20, and the insulation layer 30. The sealing layer 40 functions to form an effective closed space in the structure of the sound-absorbing and heat-insulating layer 100, preventing permeation of air and moisture. The sealing layer 40 can improve the performance of the heat insulation layer 30 and maintain the stability of the vacuum chamber 31, thereby further enhancing the heat insulation effect.

Further, the sealing layer 40 tightly seals the structure of the sound-absorbing and heat-insulating layer 100, forming a sealed space. When the vacuum chamber 31 is opened inside the heat-insulating layer 30, the sealing layers 40 play a role in isolating the vacuum chamber 31 from the outside air and moisture, and prevent the vacuum degree from being reduced, thereby maintaining the high-efficiency heat-insulating performance of the heat-insulating layer 30.

Further, the sound-absorbing heat-insulating layer 100 is suitable for indoor places where both sound-absorbing and heat-insulating functions are required. For example, in places such as concert halls, conference rooms, etc. where a good acoustic effect is required, it is necessary to keep the indoor temperature stable in addition to absorbing noise, so as to provide a comfortable environment. In such a scenario, the provision of the sound absorbing and insulating layer 100 may effectively achieve the dual effects of acoustic isolation and temperature control. In addition, such a sound absorbing and insulating layer 100 can provide a corresponding solution to ensure temperature stability and good acoustic environment for places requiring special insulation requirements, such as laboratory, medical facilities, etc.

In summary, the sound-absorbing heat-insulating layer 100 further enhances the performance of the heat-insulating layer 30 by adding two sealing layers 40, effectively isolates the indoor and outdoor temperature exchange, maintains the stability of the vacuum chamber 31, and realizes the dual effects of sound absorption and heat insulation. In an indoor environment where both acoustic performance and heat preservation effect are required, the sound-absorbing heat preservation layer 100 is an excellent technical scheme, and can be widely applied to different fields, so that comfort and experience of users are improved.

Wherein the sound-absorbing and heat-insulating layer 100 comprises a plurality of grooves 21 formed on the outer surfaces of the first sound-absorbing layer 10 and the second sound-absorbing layer 20, and the grooves 21 can increase the sound-absorbing area and the absorption range of different audios

Specifically, the presence of the grooves 21 allows the surface area of the sound absorbing and insulating layer 100 to be greater relative to a flat surface. This means that the sound-absorbing insulation layer 100 can more fully contact and absorb sound waves entering the room. The larger sound absorbing area provides more sound absorbing material, thereby improving sound absorbing efficiency and further reducing indoor noise level.

Further, sound waves of different tones have different frequencies and energies, and thus the requirements for sound absorbing materials are also different. The grooves 21 enable the sound-absorbing and heat-insulating layer 100 to absorb sound waves with different frequencies more effectively, and sound waves from high frequency to low frequency can be absorbed and weakened, so that the indoor acoustic environment is improved comprehensively.

Still further, when sound waves enter the room and hit the sound-absorbing insulation layer 100, they are first absorbed by the first sound-absorbing layer 10. The presence of the grooves 21 increases the surface area of the first sound absorbing layer 10, providing more sound absorbing material to absorb sound waves. The vibrational energy of the sound wave is converted into tiny thermal energy and dissipated in the porous structure of the grooves 21. Then, the sound waves are transmitted to the second sound-absorbing layer 20, and are absorbed and attenuated by the sound-absorbing area increased by the grooves 21 as well. Thus, by providing the grooves 21, the sound-absorbing and heat-insulating layer 100 can more comprehensively absorb and eliminate the energy of sound waves, thereby effectively reducing the indoor noise level.

As described above, the sound-absorbing heat-insulating layer 100 has the characteristic of increasing the sound-absorbing area by the grooves 21, and is suitable for various indoor places where improvement of acoustic environments is required. For example, in places such as concert halls, recording studios, theatres, libraries and the like where a high-quality acoustic effect is required, the design of the grooves 21 to increase the sound absorbing area can provide a better acoustic experience, reduce resonance and echo, and improve sound quality. In addition, the provision of the grooves 21 also makes the sound-absorbing and heat-insulating layer 100 suitable for use in industrial plants, offices, houses, etc., for reducing noise and improving indoor comfort. In summary, the sound absorbing and insulating layer 100 with the groove 21 design has a wide application potential in various indoor environments where acoustic and insulating functions are required.

The sound-absorbing insulation layer 100 includes the insulation layer 30 made of stainless steel. Stainless steel is a material having excellent heat conductive properties and low thermal conductivity. Can effectively slow down the conduction of heat, thereby realizing better heat preservation effect. Under the condition of large indoor and outdoor temperature difference, the stainless steel in the heat preservation layer 30 can effectively isolate the indoor and outdoor temperatures and prevent indoor heat loss, so that the indoor energy efficiency is improved.

In particular, stainless steel has excellent corrosion resistance, and is not easy to be corroded by moisture, acid and alkali and other environmental factors. This allows the sound absorbing and insulating layer 100 to be used stably for a long period of time in a humid or corrosive environment, extending its useful life.

Further, stainless steel has high structural strength and can provide good protection and support. Meanwhile, the stability is high, and the sound-absorbing heat-insulating layer 100 is not easily deformed or damaged by external force, so that the overall structural stability of the sound-absorbing heat-insulating layer is maintained.

As described above, in the sound-absorbing heat-insulating layer 100, the difference in indoor and outdoor temperatures causes a heat conduction process. When the indoor temperature is higher than the outdoor temperature, the stainless steel in the insulation layer 30 plays a role of heat insulation, and prevents the indoor heat from being conducted outwards. Conversely, when the outdoor temperature is higher than the indoor temperature, the stainless steel insulation layer 30 prevents external heat from being transferred into the room. This heat conduction interruption is achieved by the low thermal conductivity and good thermal insulation properties of the stainless steel material.

The vacuum chamber 31 covers the whole heat insulation layer 30, and enhances the heat insulation capability of the heat insulation layer 30. Specifically, vacuum is a very poor medium for heat conduction, since it contains no gas, and there are few phenomena of heat conduction and convection. Therefore, the vacuum chamber 31 can effectively isolate the conduction of indoor and outdoor temperatures, and prevent the loss or entry of heat, thereby significantly improving the heat insulation performance.

Further, the vacuum chamber 31 also has a good blocking effect against heat radiation. The heat radiation is generated by high-temperature radiation energy of the surface of the object, but in vacuum, the heat radiation almost cannot propagate due to no gas molecules, so that the heat loss is effectively reduced.

Still further, the sealing performance of the vacuum chamber 31 can effectively prevent air and moisture from entering the inside of the heat insulation layer 30, thereby reducing oxidation and moisture phenomena inside the heat insulation layer 30 and prolonging the service life of the sound-absorbing heat insulation layer 100.

Further, when the indoor temperature is higher than the outdoor temperature, the vacuum chamber 31 prevents heat from being externally spread by heat conduction and radiation, keeping the room warm. Conversely, when the outdoor temperature is higher than the indoor temperature, the vacuum chamber 31 will prevent external heat from entering the room, keeping the room cool. The vacuum chamber 31 reduces the path of heat transfer by eliminating the presence of air and gas, thereby achieving a better thermal insulation effect.

In summary, when the indoor temperature is higher than the outdoor temperature, the vacuum chamber 31 prevents heat from being transmitted outwards by heat conduction and radiation, and keeps the room warm. Conversely, when the outdoor temperature is higher than the indoor temperature, the vacuum chamber 31 will prevent external heat from entering the room, keeping the room cool. The vacuum chamber 31 reduces the path of heat transfer by eliminating the presence of air and gas, thereby achieving a better thermal insulation effect.

The sound-absorbing heat-insulating layer 100 according to this embodiment further includes two adhesive layers 50 disposed in the sound-absorbing heat-insulating layer 100, one adhesive layer 50 is disposed between the first sound-absorbing layer 10 and the heat-insulating layer 30, and the other adhesive layer 50 is disposed between the second sound-absorbing layer 20 and the heat-insulating layer 30.

Specifically, the adhesive layer 50 is provided to enhance the structural stability and overall performance of the sound absorbing and insulating layer 100. The presence of the adhesive layer 50 provides a tight bond between the sound absorbing layer and the insulating layer 30, ensuring that no loosening or falling off of the materials of the layers occurs, thereby improving the durability and service life of the overall sound absorbing and insulating layer 100. The material itself of the adhesive layer 50 may have a certain sound absorbing performance, and the sound absorbing effect of the sound absorbing and insulating layer 100 may be further enhanced.

Further, in manufacturing the sound-absorbing heat-insulating layer 100, a layer of adhesive is first applied to the contact surface of the first sound-absorbing layer 10 and the heat-insulating layer 30, and the first sound-absorbing layer 10 and the heat-insulating layer 30 are tightly adhered together. Similarly, a layer of adhesive is applied to the contact surface between the second sound-absorbing layer 20 and the heat-insulating layer 30, and the second sound-absorbing layer 20 and the heat-insulating layer 30 are tightly adhered together. In this way, two sealed adhesive interfaces are formed between the sound absorbing layer and the thermal insulation layer 30, so that the structure of the entire sound absorbing thermal insulation layer 100 is more firm.

Still further, such a sound absorbing and insulating layer 100 can reduce audio reflection and echo in a music classroom, providing a better music teaching and learning environment. While also being suitable for use in home theatres, the sound absorbing and insulating layer 100 can optimize audio effects while providing insulating effects and providing a better home movie and television experience

In the embodiment of the sound absorbing and insulating layer 100, the insulating layer 30 and the vacuum chamber 31 are integrally formed.

Specifically, the sound absorbing layer and the heat insulating layer 30 are closely bonded together to form an integral sound absorbing heat insulating structure. By using glue to bond and fix, a gap-free, firm bond between the sound-absorbing layer and the heat-insulating layer 30 can be ensured, thereby enhancing the stability and durability of the sound-absorbing heat-insulating layer 100. In addition, the glue has good sound absorption performance, so that the overall sound absorption effect of the sound absorption and insulation layer 100 is more excellent.

Further, in manufacturing the sound-absorbing and heat-insulating layer 100, a layer of glue is first applied to the bonding surface of the first sound-absorbing layer 10, and then the first surface (not shown) of the heat-insulating layer 30 is bonded to the glue-coated first sound-absorbing layer 10. Similarly, a layer of glue is applied to the bonding surface of the second sound-absorbing layer 20, and then the second surface (not shown) of the heat-insulating layer 30 is bonded to the glue-coated second sound-absorbing layer 20. Subsequently, the sound absorbing layer and the heat insulating layer 30 are arranged according to the structure required by the design, and then the glue is fully adhered through a certain pressurizing and curing process, so that the materials of the layers are tightly connected together.

In summary, the sound-absorbing and heat-insulating layer 100 adhered and fixed by glue has excellent sound-insulating and heat-insulating properties, is suitable for various indoor places, and provides more comfortable, calm and functional space for users.

In this example, the sound-absorbing layer and the heat-insulating layer 30 in the sound-absorbing heat-insulating layer 100 are adhered and fixed by glue. Specifically, the sound absorbing layer and the heat insulating layer 30 are closely bonded together to form an integral sound absorbing heat insulating structure. By using glue to bond and fix, a gap-free, firm bond between the sound-absorbing layer and the heat-insulating layer 30 can be ensured, thereby enhancing the stability and durability of the sound-absorbing heat-insulating layer 100. In addition, the glue has good sound absorption performance, so that the overall sound absorption effect of the sound absorption and insulation layer 100 is more excellent.

In summary, the sound-absorbing and heat-insulating layer 100 adhered and fixed by glue has wide application prospects in a plurality of indoor places, and can remarkably improve environmental acoustics, improve indoor comfort and protect health of people.

In the sound absorbing protective layer of the present embodiment, the thickness of the first sound absorbing layer 10 is equal to the thickness of the second sound absorbing layer 20, and the thickness of the heat insulating layer 30 is equal to twice the thickness of the first sound absorbing layer 10. Specifically, since the first sound-absorbing layer 10 and the second sound-absorbing layer 20 have the same thickness, the sound-absorbing performance of the sound-absorbing layers in various positions and directions will be more balanced. Therefore, sounds with different frequencies can be effectively absorbed, and a better acoustic effect is achieved.

Further, the thickness of the heat insulating layer 30 is twice the thickness of the first sound absorbing layer 10, which means that the heat insulating layer 30 can provide more heat insulating material, thereby enhancing the heat insulating performance of the sound absorbing heat insulating layer 100. The vacuum chamber 31 also helps to isolate the indoor and outdoor temperatures, further improving the heat preservation effect.

Still further, the design fully considers the thickness of each layer of material, and adds a vacuum cavity 31 on the heat preservation layer 30, thereby realizing the functions of sound absorption and heat preservation in a limited space. This is especially advantageous for some places where space is limited, such as urban apartments and small workplaces.

In summary, this design has many advantages, including balanced acoustic performance, enhanced thermal insulation, structural stability, and space saving. This allows the sound absorbing and insulating layer 100 to be applied in various indoor scenes with good effects. For example, in residential, office, educational, medical, and recreational applications, the sound absorbing and insulating layer 100 may be used to create a more comfortable, calm, energy efficient indoor environment that improves people's living and working quality.

While the application has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the application.

Claims

1. A sound absorbing and insulating layer for installation in a room, comprising:

a first sound-absorbing layer;

2. The sound absorbing and insulating layer of claim 1, wherein the first sound absorbing layer and the second sound absorbing layer are sound absorbing sponges.

3. The sound absorbing and insulating layer according to claim 2, further comprising two sealing layers, one sealing layer being disposed between the first sound absorbing layer and the insulating layer and the other sealing layer being disposed between the second sound absorbing layer and the insulating layer.

4. The sound-absorbing and heat-insulating layer according to claim 1, wherein the plurality of grooves are formed on the outer surfaces of the first sound-absorbing layer and the second sound-absorbing layer, so that the sound-absorbing area can be increased and the absorption range of different audios can be increased.

5. The sound absorbing and insulating layer of claim 1, wherein the insulating layer is stainless steel.

6. The sound absorbing and insulating layer according to claim 1, wherein the vacuum chamber covers the entire insulating layer, enhancing the insulating ability of the insulating layer.

7. The sound-absorbing and heat-insulating layer according to claim 1, wherein two adhesive layers are further arranged in the sound-absorbing and heat-insulating layer, one adhesive layer is arranged between the first sound-absorbing layer and the heat-insulating layer, and the other adhesive layer is arranged between the second sound-absorbing layer and the heat-insulating layer.

8. The sound absorbing and insulating layer of claim 1, wherein the insulating layer is integrally formed with the vacuum chamber.

9. The sound absorbing and insulating layer according to claim 1, wherein the sound absorbing layer and the insulating layer are fixed by gluing.

10. The sound absorbing and insulating layer of claim 1, wherein the thickness of the first sound absorbing layer is equal to the thickness of the second sound absorbing layer, and the thickness of the insulating layer is equal to twice the thickness of the first sound absorbing layer.