Detachable noise-reduction ventilating window without air port on front surface

Abstract

The invention belongs to the technical field of ventilation and noise reduction, and particularly discloses a detachable noise-reduction ventilation window without an air opening in the front face, which comprises a building wall body, and an indoor side noise-reduction ventilation window, an outdoor side noise-reduction ventilation window and an in-window-opening noise-reduction ventilation window which are arranged on a window opening of the building wall body; through triple noise reduction and layer-by-layer protection of the three-layer structure of the indoor side, the interior of the window opening and the outdoor side, by combining multiple mechanisms of sound insulation, sound absorption and noise elimination, extremely high isolation and attenuation capacities are achieved for broadband environmental noise, sound energy in a channel is absorbed to the maximum extent through internal noise elimination pieces, flow guide sound absorbers and filled sound absorption cotton, and noise introduction caused by ventilation is remarkably reduced. An effective ventilation path is formed through the shutters on the side faces, the upper portion and the lower portion and the holes in the wind shield. The conical and semi-cylindrical flow guide sound absorbers optimize air distribution, reduce ventilation resistance and maintain enough ventilation quantity on the premise of strong noise reduction. The stainless steel insect-proof net effectively prevents mosquitoes, catkins and the like from entering a ventilation channel and a room.

Description

Technical Field

[0001] This invention relates to the field of ventilation and noise reduction technology, specifically to a detachable, front-facing, air-ventless noise-reducing ventilation window. Background Technology

[0002] In the field of noise control engineering, ventilation openings installed in walls are treated with ventilation silencers for noise reduction, with a typical requirement of 4-40 dB(A) and a ventilation volume of several thousand to hundreds of thousands of cubic meters per hour. Currently, existing ventilation silencers are mainly divided into three types: first, duct-type silencers embedded in the wall and resembling air ducts, commonly found in air conditioning ventilation ducts of office buildings, subways, and other buildings; second, ventilation silencer louvers, with a louver-like front embedded in the window opening; and third, ventilation soundproof windows, whose exterior facade is basically the same as ordinary light-transmitting soundproof windows, also composed of light-transmitting glass, profiles, and hardware. The difference is that the window frame of the ventilation soundproof window is thicker than that of ordinary light-transmitting soundproof windows, and a very small air vent is provided on the exterior facade of the window frame for ventilation.

[0003] Duct silencers are commonly used in ventilation duct systems. Most of them are resistive silencers with medium to high frequency noise reduction performance. Their noise reduction is generally in the range of 10-50 dB(A). They have good ventilation performance and can be set with different ventilation volumes of several thousand to tens of thousands of cubic meters per hour according to ventilation needs. However, they are installed in wall openings, which has very poor decorative effect. The thickness of the silencer is generally between 1-3m, which is almost unsuitable for use as a window. Therefore, they are not suitable as ventilation and noise reduction type windows.

[0004] Ventilation-absorbing louvers are essentially resistive silencers with mid-to-high frequency noise reduction performance. They are widely used in ventilation and noise reduction window structures, such as ventilation openings in subway ventilation shafts and air inlets for ventilation and heat dissipation in soundproof enclosures. Their exterior facade resembles louvers, possessing the characteristics of a window facade. Noise reduction performance is generally between 4-30 dB(A). Silencers can be configured to handle ventilation volumes ranging from several thousand to tens of thousands of cubic meters per hour, depending on ventilation needs. However, their disadvantages are also obvious: firstly, the noise reduction is not high, generally only reaching a maximum of 30 dB(A). Furthermore, it has poor low-frequency noise reduction; secondly, the front of the window has louvered air vents, which are precisely where noise radiates. When people pass by the soundproof window, they can clearly hear the noise transmitted from the indoor side through the louvered air vents. Over time, people will become subjectively annoyed by the noise from the ventilation louvers on the front, and may even request that all the louvers on the exterior of the window be sealed with boards, thus creating a requirement that the air vents should not be visible from the front; thirdly, it is bulky and can only be disassembled as a whole on site, making it impossible to achieve a detachable modular design.

[0005] Ventilated soundproof windows evolved from soundproof and light-transmitting windows and are typically used in residential exterior windows. Their design aims to provide a small amount of airflow while ensuring adequate sound insulation and light transmission for small spaces. Therefore, their airflow is generally only a few hundred cubic meters per hour, far less than traditional ventilation systems, making them unsuitable for general ventilation and heat dissipation. The noise reduction of ventilated soundproof windows is typically 10-40 dB(A).

[0006] In summary, if a device with moderate thickness, good decorative properties, a sound attenuation of 10-40 dB(A), a ventilation volume of several thousand to hundreds of thousands of cubic meters per hour, the ability to cover most ventilation and heat dissipation areas, and a front-facing air vent noise reduction device can be provided, then the advantages of all the above-mentioned sound attenuation devices can be combined and their shortcomings can be solved. Summary of the Invention

[0007] The purpose of this invention is to provide a detachable, front-facing, air-ventless noise-reducing ventilation window, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a detachable front-facing noise-reducing ventilation window without an air vent, comprising a building wall and an indoor noise-reducing ventilation window, an outdoor noise-reducing ventilation window, and a noise-reducing ventilation window inside the window opening, all installed on the window opening of the building wall.

[0009] The front of the indoor noise-reducing ventilation window is equipped with a first modular sound-absorbing panel. The left and right sides, as well as the top and bottom of the indoor noise-reducing ventilation window, are equipped with first ventilation louvers. The inside of the first ventilation louvers is equipped with a first stainless steel insect screen. The inside of the indoor noise-reducing ventilation window is equipped with a first modular sound-absorbing plate and a first conical airflow guide sound absorber.

[0010] The front sound-absorbing panel effectively blocks the propagation path of frontal noise from the interior and absorbs some sound energy. The side and top / bottom louvers provide the main air intake channels, and their directionality helps to shield some directly incident noise. The inner insect screen prevents insects and birds from entering the ventilation system. The internal sound-absorbing diaphragms and conical airflow-guiding absorbers constitute the first-stage noise reduction channel: the diaphragms provide the main sound absorption and sound wave reflection attenuation surfaces, while the conical airflow-guiding absorbers smooth airflow, reduce turbulence and airflow-generated noise, and their sound-absorbing surfaces further absorb sound energy, collectively performing initial noise reduction on the passing air.

[0011] The outdoor noise-reducing ventilation window is equipped with a second modular sound-absorbing panel on the front and top. The outdoor noise-reducing ventilation window is equipped with second ventilation louvers on both the left and right sides. The outdoor noise-reducing ventilation window is equipped with a second stainless steel insect screen at the bottom. The outdoor noise-reducing ventilation window is equipped with a second modular sound-absorbing sheet and a second conical airflow guide sound absorber on the inside. The outdoor noise-reducing ventilation window is equipped with a flashing plate on the upper second modular sound-absorbing panel.

[0012] The front and top sound-absorbing panels effectively block the direct intrusion of external environmental noise (especially rain noise and overhead noise) and absorb sound energy. The side louvers, serving as the main ventilation openings, also help block some external noise from directly entering the channel. The lower insect screen prevents insects from entering the system from the vents. The inner sound-absorbing fins and tapered air-guiding absorbers form a second-stage sound-absorbing channel, providing final noise reduction for the incoming airflow, preventing internal noise leakage and further attenuating external noise. The flashing is a crucial waterproof design, effectively preventing rainwater from seeping into the ventilation window's internal structure through the upper gaps, protecting the sound-absorbing materials and internal components.

[0013] In a preferred embodiment of the present invention, the first ventilation louver, the second ventilation louver, the first stainless steel insect screen, and the second stainless steel insect screen are all detachable. This facilitates cleaning and replacement, and they can be fixed using bolts. The louvers and insect screens are components prone to dust accumulation, clogging, or damage. The detachable design (e.g., bolt fixing) greatly facilitates users or maintenance personnel in regularly cleaning, inspecting, or replacing these components, ensuring ventilation efficiency, insect control effectiveness, and long-term stable operation of the system, while reducing maintenance difficulty and costs.

[0014] In a preferred embodiment of the present invention, the modular sound-absorbing panel consists of an outer steel or aluminum plate and an inner perforated steel or aluminum plate, with the interior filled with moisture-proof centrifugal glass wool wrapped in fiberglass cloth, the thickness of which is 50-100mm. The dense outer panel provides excellent sound insulation (mass law), blocking sound wave penetration. The perforated inner panel allows sound waves to enter the sound-absorbing layer. Moisture-proof centrifugal glass wool is a highly efficient, broadband sound-absorbing material that significantly absorbs the transmitted sound energy and converts it into heat energy. The fiberglass cloth wrapping ensures the moisture resistance and long-term stability of the sound-absorbing cotton, preventing the sound absorption performance from decreasing due to moisture. The 50-100mm thickness provides sufficient sound insulation and sound absorption performance, balancing effectiveness with space occupation. The modular design facilitates production, transportation, installation, and maintenance / replacement.

[0015] In a preferred embodiment of the present invention, the first modular sound-absorbing plate includes a first rectangular sound-absorbing plate and first semi-cylindrical flow-guiding sound-absorbing bodies installed at both ends of the first rectangular sound-absorbing plate; the second modular sound-absorbing plate includes a second rectangular sound-absorbing plate and second semi-cylindrical flow-guiding sound-absorbing bodies installed at both ends of the second rectangular sound-absorbing plate. The rectangular sound-absorbing plate provides the main sound-absorbing surface area. The semi-cylindrical flow-guiding sound-absorbing bodies installed at both ends have a dual function: firstly, their smooth curved surfaces significantly optimize the airflow field when entering and exiting the rectangular sound-absorbing plate, reducing local resistance, eddies, and the resulting airflow-generated noise; secondly, their perforated surfaces and internal sound-absorbing materials are themselves highly efficient sound absorbers, further attenuating sound waves. This combined design perfectly integrates sound absorption and flow guidance functions, reducing ventilation resistance while ensuring noise reduction effects. The modular design also brings convenience.

[0016] Preferably, the outer surfaces of both the first and second rectangular sound-absorbing sheets are perforated steel or aluminum plates, and the interior is filled with moisture-proof centrifugal glass wool wrapped in fiberglass cloth, with a thickness of 50-200mm. The perforated panels allow sound waves to enter the sound-absorbing layer. The internal moisture-proof centrifugal glass wool provides core broadband sound absorption capabilities. The fiberglass cloth wrapping ensures the moisture-proof durability of the sound-absorbing material. The relatively large thickness range of 50-200mm (compared to sound-absorbing panels) allows for flexible design according to noise reduction needs, providing deeper sound wave attenuation, especially when dealing with low-frequency noise; thicker sound-absorbing sheets are more effective.

[0017] As a preferred embodiment of the present invention, the noise-reducing ventilation window within the window opening includes a windbreak noise-reducing panel and a third semi-cylindrical sound-absorbing guide installed on the side of the windbreak noise-reducing panel. The windbreak noise-reducing panel is connected to the window on the building wall. The windbreak noise-reducing panel is the core structural component installed within the window opening in the wall, serving to connect indoor and outdoor components, support the system, and seal the window opening; it is also a noise-reducing element itself. The semi-cylindrical sound-absorbing guide on the side primarily optimizes the airflow profile as it passes through the windbreak in the narrow window opening space, reducing turbulence and wind noise. Its sound-absorbing surface also helps absorb reverberant sound energy within the window opening.

[0018] In a preferred embodiment of the present invention, the windbreak and noise reduction panel is composed of a perforated steel or aluminum plate on the outer side, with an internal partition and filled with moisture-proof centrifugal glass wool wrapped in fiberglass cloth. The windbreak and noise reduction panel has square holes, and its thickness is the same as that of the building wall. The square holes are for ventilation. The perforated panel allows sound waves to enter the internal sound-absorbing layer. The internal moisture-proof centrifugal glass wool efficiently absorbs sound energy. The built-in partition enhances structural rigidity, and its square holes are the main channels for airflow through the windbreak and noise reduction panel. The shape and size of the holes are designed to balance ventilation volume and noise regeneration caused by airflow. The partition filled with sound-absorbing cotton forms sound-absorbing channels around the holes, effectively absorbing sound waves as airflow passes through them. The thickness being the same as the wall ensures stable installation and good sealing, avoiding sound bridges and sound leakage gaps, making the overall sound insulation performance of the ventilation window match that of the wall.

[0019] In a preferred embodiment of the present invention, both the first and second conical sound-absorbing guide bodies are square pyramids. Both are composed of perforated steel or aluminum plates on their outer surfaces, and are internally filled with moisture-proof centrifugal glass wool wrapped in fiberglass cloth. The square pyramid shape not only facilitates manufacturing but is also particularly suitable for guiding airflow smoothly to expand or contract within a rectangular cross-section ventilation channel, significantly reducing turbulence, eddies, and the resulting regenerated noise (airflow noise) generated at abrupt changes in the cross-section, while also achieving frequency reduction and noise reduction. The perforated panel allows sound waves to penetrate. The internal moisture-proof centrifugal glass wool efficiently absorbs the penetrated sound energy, making the guide body simultaneously a powerful sound-absorbing element. This design tightly integrates aerodynamic optimization with acoustic noise reduction, maximizing the suppression of noise generated by the airflow itself and sound propagation within the channel while ensuring ventilation efficiency.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention employs a triple noise reduction barrier structure—indoor, window-entry, and outdoor—combining sound insulation, absorption, and attenuation mechanisms to provide exceptional isolation and attenuation of broadband environmental noise. Internal sound-absorbing sheets, airflow-guiding sound absorbers, and sound-absorbing cotton maximize sound energy absorption within the ventilation channel, significantly reducing noise transmission during ventilation. Effective ventilation paths are created through louvers and wind deflectors on the sides and top / bottom. Conical and semi-cylindrical airflow-guiding sound absorbers optimize airflow organization, reducing ventilation resistance and maintaining sufficient ventilation volume while maximizing noise reduction. Stainless steel insect netting effectively prevents mosquitoes, willow catkins, and other insects from entering the ventilation channel and indoors. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the planar structure of the present invention. Figure 1 ;

[0023] Figure 2This is a schematic diagram of the planar structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the AA cross-sectional structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the BB cross-sectional structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the first modular sound-absorbing sheet and the second modular sound-absorbing sheet of the present invention.

[0027] In the diagram: 1. Building wall; 2. Indoor noise-reducing ventilation window; 201. First modular sound-absorbing panel; 202. First ventilation louver; 203. First modular sound-absorbing sheet; 2031. First rectangular sound-absorbing sheet; 2032. First semi-cylindrical flow-guiding sound absorber; 204. First conical flow-guiding sound absorber; 205. First stainless steel insect-proof net; 3. Outdoor noise-reducing ventilation window; 301. Second modular sound-absorbing panel; 302. Second ventilation louver; 303. Second modular sound-absorbing sheet; 3031. Second rectangular sound-absorbing sheet; 3032. Second semi-cylindrical flow-guiding sound absorber; 304. Second conical flow-guiding sound absorber; 305. Second stainless steel insect-proof net; 306. Flashing; 4. Noise-reducing ventilation window inside the window opening; 401. Windbreak noise-reducing panel; 402. Third semi-cylindrical flow-guiding sound absorber. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Please see Figure 1-5 The present invention provides a technical solution: a detachable front-facing noise-reducing ventilation window without an air vent, comprising a building wall 1 and an indoor noise-reducing ventilation window 2, an outdoor noise-reducing ventilation window 3, and a noise-reducing ventilation window 4 installed on the window opening of the building wall 1.

[0032] The indoor noise reduction ventilation window 2 is equipped with a first modular sound insulation and sound absorption panel 201 on the front. The indoor noise reduction ventilation window 2 is equipped with first ventilation louvers 202 on the left and right sides, as well as above and below. The first stainless steel insect net 205 is installed inside the first ventilation louvers 202. The indoor noise reduction ventilation window 2 is equipped with a first modular sound-absorbing plate 203 and a first conical airflow guiding sound absorber 204.

[0033] The front sound-absorbing panel effectively blocks the propagation path of noise from the interior and absorbs some sound energy. The side and top / bottom louvers provide the main air intake channels, and their directionality helps to shield some directly incident noise. The inner insect screen prevents insects and birds from entering the ventilation system. The internal sound-absorbing plates and conical airflow-guiding absorbers constitute the first-stage noise reduction channel: the sound-absorbing plates provide the main sound absorption and sound wave reflection attenuation surfaces, while the conical airflow-guiding absorbers smooth airflow, reduce turbulence and airflow-generated noise, and their sound-absorbing surfaces further absorb sound energy, together performing preliminary noise reduction on the passing air.

[0034] The outdoor noise reduction ventilation window 3 is equipped with a second modular sound insulation and sound absorption panel 301 on the front and top. The outdoor noise reduction ventilation window 3 is equipped with second ventilation louvers 302 on both the left and right sides. The outdoor noise reduction ventilation window 3 is equipped with a second stainless steel insect net 305 at the bottom. The outdoor noise reduction ventilation window 3 is equipped with a second modular sound-absorbing plate 303 and a second conical flow guide sound absorber 304 on the inner side. The second modular sound insulation and sound absorption panel 301 located at the top is equipped with a flashing plate 306.

[0035] The front and top sound-absorbing panels effectively block the direct intrusion of external environmental noise (especially rain noise and overhead noise) and absorb sound energy. The side louvers, serving as the main ventilation openings, also help block some external noise from directly entering the channel. The lower insect screen prevents insects from entering the system from the vents. The inner sound-absorbing fins and tapered air-guiding absorbers form a second-stage sound-absorbing channel, providing final noise reduction for the incoming airflow, preventing internal noise leakage and further attenuating external noise. The 306 waterproof flashing is a key waterproof design feature, effectively preventing rainwater from seeping into the ventilation window's internal structure through the upper gaps, protecting the sound-absorbing materials and internal components.

[0036] Specifically, the first ventilation louver 202, the second ventilation louver 302, the first stainless steel insect screen 205, and the second stainless steel insect screen 305 are all detachable and installable. This facilitates cleaning and replacement, and they can be fixed with bolts. Louvers and insect screens are components prone to dust accumulation, clogging, or damage. The detachable design (such as bolt fixing) greatly facilitates users or maintenance personnel in regularly cleaning, inspecting, or replacing these components, ensuring ventilation efficiency, insect control effect, and long-term stable operation of the system, while reducing maintenance difficulty and costs.

[0037] Specifically, the modular sound-absorbing panel consists of an outer steel or aluminum plate and an inner perforated steel or aluminum plate, filled internally with moisture-proof centrifugal glass wool wrapped in fiberglass cloth, with a thickness of 50-100mm. The dense outer panel provides excellent sound insulation (mass law), blocking sound wave penetration. The perforated inner panel allows sound waves to enter the sound-absorbing layer. The moisture-proof centrifugal glass wool is a highly efficient, broadband sound-absorbing material that significantly absorbs the transmitted sound energy and converts it into heat energy. The fiberglass cloth wrapping ensures the moisture resistance and long-term stability of the sound-absorbing cotton, preventing the sound absorption performance from decreasing due to moisture. The 50-100mm thickness provides sufficient sound insulation and sound absorption performance, balancing effectiveness with space occupation. The modular design facilitates production, transportation, installation, and maintenance / replacement.

[0038] Specifically, the first modular sound-absorbing plate 203 includes a first rectangular sound-absorbing plate 2031 and first semi-cylindrical flow-guiding sound-absorbing bodies 2032 installed at both ends of the first rectangular sound-absorbing plate 2031; the second modular sound-absorbing plate 303 includes a second rectangular sound-absorbing plate 3031 and second semi-cylindrical flow-guiding sound-absorbing bodies 3032 installed at both ends of the second rectangular sound-absorbing plate 3031. The rectangular sound-absorbing plate provides the main sound-absorbing surface area. The semi-cylindrical flow-guiding sound-absorbing bodies installed at both ends have a dual function: firstly, their smooth curved surfaces significantly optimize the airflow field when entering and exiting the rectangular sound-absorbing plate, reducing local resistance, eddies, and the resulting airflow-generated noise; secondly, their perforated surfaces and internal sound-absorbing materials are themselves highly efficient sound absorbers, further attenuating sound waves. This combined design perfectly integrates sound absorption and flow guidance functions, reducing ventilation resistance while ensuring noise reduction effects. The modular design also brings convenience.

[0039] Specifically, the outer surfaces of both the first rectangular sound-absorbing sheet 2031 and the second rectangular sound-absorbing sheet 3031 are perforated steel or aluminum plates, and the interior is filled with moisture-proof centrifugal glass wool wrapped in fiberglass cloth, with a thickness of 50-200mm. The perforated panels allow sound waves to enter the sound-absorbing layer. The internal moisture-proof centrifugal glass wool provides core broadband sound absorption capabilities. The fiberglass cloth wrapping ensures the moisture-proof durability of the sound-absorbing material. The relatively large thickness range of 50-200mm (compared to sound-absorbing panels) allows for flexible design according to noise reduction needs, providing deeper sound wave attenuation, especially when dealing with low-frequency noise, where thicker sound-absorbing sheets are more effective.

[0040] Specifically, the noise-reducing ventilation window 4 inside the window opening includes a windbreak noise-reducing panel 401 and a third semi-cylindrical airflow-guiding sound-absorbing body 402 installed on the side of the windbreak noise-reducing panel 401. The windbreak noise-reducing panel 401 is connected to the window on the building wall. The windbreak noise-reducing panel 401 is the core structural component installed inside the window opening in the wall, serving to connect indoor and outdoor components, support the system, and seal the window opening. It is also a noise-reducing element itself. The semi-cylindrical airflow-guiding sound-absorbing panel on the side mainly optimizes the airflow streamline when passing through the windbreak panel in the narrow window opening space, reducing turbulence and wind noise. Its sound-absorbing surface can also help absorb reverberant sound energy inside the window opening.

[0041] Specifically, the windbreak and noise reduction panel 401 consists of a perforated steel or aluminum plate on the outer side, with internal partitions and filled with moisture-proof centrifugal glass wool wrapped in fiberglass cloth. The windbreak and noise reduction panel 401 has square holes, and its thickness is the same as that of the building wall 1. The square holes are for ventilation. The perforated panel allows sound waves to enter the internal sound-absorbing layer. The internal moisture-proof centrifugal glass wool efficiently absorbs sound energy. The built-in partitions enhance structural rigidity, and the square holes are the main channels for airflow through the windbreak and noise reduction panel 401. The shape and size of the holes are designed to balance ventilation volume and noise regeneration caused by airflow. The partitions filled with sound-absorbing cotton form sound-absorbing channels around the holes, effectively absorbing sound waves as airflow passes through them. The thickness being the same as the wall ensures stable installation and good sealing, avoiding sound bridges and sound leakage gaps, making the overall sound insulation performance of the ventilation window match that of the wall.

[0042] Specifically, both the first conical airflow guide sound absorber 204 and the second conical airflow guide sound absorber 304 are square pyramids. Both are composed of perforated steel or aluminum plates on the outer surface, and are internally filled with moisture-proof centrifugal glass wool wrapped in fiberglass cloth. The square pyramid shape not only facilitates manufacturing but is also particularly suitable for guiding airflow smoothly to expand or contract in a rectangular cross-section ventilation channel, significantly reducing turbulence, eddies, and the resulting regenerated noise (airflow noise) generated at abrupt changes in the cross-section, while also achieving frequency reduction and noise reduction. The perforated panel allows sound waves to penetrate. The internal moisture-proof centrifugal glass wool efficiently absorbs the penetrated sound energy, making the airflow guide a powerful sound-absorbing element at the same time. This design tightly integrates aerodynamic optimization with acoustic noise reduction, maximizing the suppression of noise generated by the airflow itself and sound propagation within the channel while ensuring ventilation efficiency.

[0043] In summary, when this ventilation window is in use, the ventilation function is that outdoor airflow enters through the detachable second ventilation louvers 302 on the bottom and two sides of the outdoor noise-reducing ventilation window 3, then enters through the square holes of the windbreak and noise-reducing plate 401 of the noise-reducing ventilation window 4 inside the window opening through the ventilation channel, then enters the indoor noise-reducing ventilation window 2 through the ventilation channel, and finally flows into the room through the first ventilation louvers 202 and the first stainless steel insect screen 205 on the two sides of the indoor noise-reducing ventilation window 2.

[0044] The exhaust function involves the indoor airflow entering through the first ventilation louvers 202 and the first stainless steel insect screen 205 on both sides of the indoor noise-reducing ventilation window 2, then entering the square holes of the windbreak and noise-reducing plate 401 of the noise-reducing ventilation window 4 through the ventilation channel, and finally exiting to the outside through the second ventilation louver 302 of the outdoor noise-reducing ventilation window 3.

[0045] During use, on the indoor side, the first modular sound-absorbing panel 201 blocks frontal noise, and the first ventilation louver 202 introduces airflow. After passing through the first stainless steel insect-proof net 205, the airflow enters the sound-absorbing channel composed of the first modular sound-absorbing plate 203 and the first conical guide sound absorber 204, where it undergoes the first sound absorption, noise reduction, and airflow guidance.

[0046] Inside the window opening, the windbreak and noise reduction panel 401 (filled with sound-absorbing material and with perforations) further absorbs and blocks noise, while the third semi-cylindrical sound-absorbing guide panel on its side guides airflow and reduces airflow noise and sound reflection. Airflow flows through the square holes in the partition.

[0047] On the outdoor side, the second modular sound-absorbing panel 301 on the front and top blocks the main noise sources (especially rain noise from above), while the second ventilation louver 302 on the side exhausts the airflow. After passing through the second stainless steel insect screen 305, the airflow enters the sound-absorbing channel composed of the second modular sound-absorbing plate 303 and the second conical guide sound absorber 304 for final sound absorption, noise reduction, and airflow guidance. The flashing 306 prevents rainwater from seeping in from above.

[0048] Sound insulation: Multi-layer modular sound insulation and sound absorption panels (steel plate, aluminum plate, sound-absorbing cotton) effectively block the direct transmission of mid-to-high frequency noise.

[0049] Sound absorption: Moisture-proof centrifugal glass wool (wrapped inside sound insulation and sound absorption panels, sound-absorbing sheets, flow-guiding sound absorbers, and wind deflectors) efficiently absorbs mid-to-high frequency sound energy entering the channel, reducing reverberation and transmission.

[0050] Noise reduction (resistive + resistive): It is composed of 3 sections of reactive silencer and 2 sections of resistive silencer. The cavity volume of the three expansion chamber silencers is different, and the thickness of the silencer plates of the 2 sections of resistive silencer is also different, so as to achieve a wide frequency noise reduction function. Outdoor airflow enters the first expansion chamber of the outdoor noise-reducing ventilation duct through the second ventilation louver 302, forming the first expansion-type reactive silencer. After passing through the first expansion chamber, the airflow enters the ventilation duct containing the second module sound-absorbing plate 303, forming the first plate-type resistive silencer. After passing through the second module sound-absorbing plate 303, the airflow flows into the second expansion chamber enclosed by the first conical guide sound absorber 204, the third semi-circular guide sound absorber 402, and the second conical guide sound absorber 304, forming the second expansion-type reactive silencer. After passing through the second expansion chamber, the airflow enters the ventilation duct containing the first module sound-absorbing plate 203, forming the second plate-type resistive silencer. After passing through the first module sound-absorbing plate 203, the airflow flows into the third expansion chamber, forming the third expansion-type reactive silencer. Figure 2 As shown.

[0051] The sound-absorbing plate (rectangular with semi-cylinders at both ends) increases the length and tortuosity of the airflow channel, and uses the cross-sectional changes and sound-absorbing materials to reflect and absorb sound waves.

[0052] The conical / semi-cylindrical flow-guiding sound absorber combines the functions of flow guidance (smoothing airflow and reducing turbulent noise) and sound absorption (perforated surface plate + internal sound-absorbing cotton).

[0053] Silencing channel design: The airflow is forced to flow in a complex, highly sound-absorbing channel composed of multiple layers of silencing plates and flow-guiding sound absorbers, and the sound waves are repeatedly reflected, absorbed and attenuated.

[0054] No front air vents: All ventilation openings (louvers) are located on the sides and top and bottom, and the front is completely sealed by sound insulation and sound absorption panels, which completely eliminates the direct sound transmission path from the front and significantly improves the overall sound insulation performance.

[0055] It is worth noting that: Figure 1-4 The arrows marked in the text indicate the direction of airflow, but are not limited to that direction; airflow can also occur in the opposite direction.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable, front-facing, air-ventless noise-reducing ventilation window, characterized in that: Including the building wall (1) and the indoor noise reduction ventilation window (2), outdoor noise reduction ventilation window (3) and the noise reduction ventilation window (4) installed on the window opening of the building wall (1); The indoor noise reduction ventilation window (2) is equipped with a first modular sound insulation and sound absorption panel (201) on the front. The indoor noise reduction ventilation window (2) is equipped with first ventilation louvers (202) on the left and right sides, as well as above and below. The first stainless steel insect net (205) is installed inside the first ventilation louvers (202). The indoor noise reduction ventilation window (2) is equipped with a first modular sound-absorbing sheet (203) and a first conical flow guide sound absorber (204) inside the indoor noise reduction ventilation window (2). The outdoor noise reduction ventilation window (3) is equipped with a second modular sound insulation and sound absorption panel (301) on the front and top. The outdoor noise reduction ventilation window (3) is equipped with a second ventilation louver (302) on both the left and right sides. The outdoor noise reduction ventilation window (3) is equipped with a second stainless steel insect net (305) at the bottom. The outdoor noise reduction ventilation window (3) is equipped with a second modular sound-absorbing sheet (303) and a second conical flow guide sound absorber (304) on the inside. The second modular sound insulation and sound absorption panel (301) located above is equipped with a flashing plate (306).

2. The detachable, front-facing, air-ventless noise-reducing ventilation window according to claim 1, characterized in that: The first ventilation louver (202), the second ventilation louver (302), the first stainless steel insect screen (205), and the second stainless steel insect screen (305) are all detachable and installable.

3. A detachable, front-facing, air-ventless noise-reducing ventilation window according to claim 1, characterized in that: The modular sound insulation and sound absorption panel consists of an outer steel plate or aluminum plate and an inner perforated steel plate or aluminum plate, and is filled with moisture-proof centrifugal glass wool wrapped with fiberglass cloth, with a thickness of 50-100mm.

4. A detachable, front-facing, air-ventless noise-reducing ventilation window according to claim 1, characterized in that: The first modular sound-absorbing plate (203) includes a first rectangular sound-absorbing plate (2031) and a first semi-cylindrical flow-guiding sound-absorbing body (2032) installed at both ends of the first rectangular sound-absorbing plate (2031); the second modular sound-absorbing plate (303) includes a second rectangular sound-absorbing plate (3031) and a second semi-cylindrical flow-guiding sound-absorbing body (3032) installed at both ends of the second rectangular sound-absorbing plate (3031).

5. A detachable, front-facing, air-ventless noise-reducing ventilation window according to claim 1, characterized in that: The outer surfaces of the first rectangular sound-absorbing sheet (2031) and the second rectangular sound-absorbing sheet (3031) are both perforated steel plates or aluminum plates, and the interior is filled with moisture-proof centrifugal glass wool wrapped with glass fiber cloth, with a thickness of 50-200mm.

6. A detachable, front-facing, air-ventless noise-reducing ventilation window according to claim 1, characterized in that: The noise reduction ventilation window (4) inside the window opening includes a windbreak noise reduction plate (401) and a third semi-cylindrical flow guide sound absorber (402) installed on the side of the windbreak noise reduction plate (401). The windbreak noise reduction plate (401) is connected to the window on the wall of the building.

7. A detachable, front-facing, air-ventless noise-reducing ventilation window according to claim 1, characterized in that: The windbreak and noise reduction panel (401) is composed of a perforated steel plate or aluminum plate on the outer side, and has a partition inside and is filled with moisture-proof centrifugal glass wool wrapped with glass fiber cloth. The windbreak and noise reduction panel (401) has square holes, and the thickness of the windbreak and noise reduction panel (401) is the same as the thickness of the building wall (1).

8. A detachable, front-facing, air-ventless noise-reducing ventilation window according to claim 1, characterized in that: The first conical sound-absorbing body (204) and the second conical sound-absorbing body (304) are both square cones. The first conical sound-absorbing body (204) and the second conical sound-absorbing body (304) are both composed of perforated steel plates or aluminum plates on the outer side and filled with moisture-proof centrifugal glass wool wrapped with glass fiber cloth inside.

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