Sound absorption lamp of all-metal fine convex micropore structure

Abstract

The invention provides a sound absorption lamp of an all-metal fine convex micropore structure, and relates to the technical field of illumination. The box body comprises a shell frame formed by a micro-perforated metal plate, a Z-shaped resonance plate is arranged in the shell frame, the shell frame is provided with an end cover assembly, and the end cover assembly and the shell frame jointly surround the Z-shaped resonance plate; the inner space of the shell frame is divided into two acoustic chambers by the Z-shaped resonance plate; porous plate surfaces are arranged on the left side and the right side of the shell frame, and a plurality of micro-perforated holes are uniformly distributed in the porous plate surfaces; when sound waves enter the acoustic cavity through the micro-perforations, the Z-shaped resonance plate is excited to vibrate, so that air molecules in the cavity generate friction with the surface of the Z-shaped resonance plate and the inner wall of the cavity, sound energy is converted into heat energy to be consumed, and sound absorption is achieved. The beneficial effects of the invention are that the sound absorption frequency can be broadened, and the sound absorption plate is made of metal and has the advantages of environmental protection, easy surface treatment and good heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, in particular to a sound-absorbing lamp with an all-metal fine-convex microporous structure. Background Art

[0002] In today's acoustics and lighting fields, sound-absorbing lamps are increasingly used, playing a vital role in improving indoor acoustic environments. Currently, most sound-absorbing lamps on the market are made of polyester fiber or other fiber-based materials, and their sound absorption principle relies primarily on the sound absorption properties of the material itself. While this structure can achieve sound absorption to a certain extent, it exposes a series of serious drawbacks: 1. From a fire safety perspective, these sound-absorbing lamps are not fireproof. In crowded places such as large conference rooms, school classrooms, and banquet halls, once a fire breaks out, non-fireproof sound-absorbing lamps can easily become fuel for the spread of the fire, posing a huge threat to people's lives and property.

[0003] 2. In terms of cleaning and maintenance, these sound-absorbing lamps are easily contaminated with dust, and due to the characteristics of the material, cleaning becomes very difficult. Over time, the accumulation of dust not only affects the aesthetics of the lamp, but also may reduce its sound absorption effect, further affecting the indoor acoustic environment.

[0004] 3. Existing sound-absorbing lamps have significant frequency limitations in terms of sound absorption performance. While they perform well at high frequencies, their performance at mid- and low-frequency sound absorption is less than satisfactory. In places where sound absorption is actually required, mid-frequency absorption is often the most demanding, followed by low-frequency absorption. For example, the frequency bandwidth that primarily affects speech intelligibility is 350-1400Hz. Poor mid- and low-frequency sound absorption can lead to decreased speech clarity, seriously impacting communication and user experience.

[0005] 4. In terms of environmental protection, the processing of these sound-absorbing lamps usually requires the use of adhesives such as glass glue and structural adhesive. These adhesives release harmful substances such as formaldehyde and VOCs, causing serious pollution to indoor air quality. Long-term exposure to such an environment will have adverse effects on people's health.

[0006] 5. In terms of design, the color of existing sound-absorbing lamps is completely dependent on the color of the material itself, making it difficult to change later. This greatly limits the lamps' compatibility with interiors of varying decor styles and fails to meet the diverse aesthetic needs of users.

[0007] 6. Furthermore, the excellent thermal insulation performance of traditional sound-absorbing lamps can actually become a disadvantage in lamp applications. Since lamps generate heat during operation, good thermal insulation performance can affect the heat dissipation of lamp components, leading to excessively high internal temperatures, exacerbating light decay, shortening lamp life, and increasing user costs.

[0008] That is, existing sound-absorbing lamps have many problems in terms of fire prevention, cleanliness, sound absorption performance, environmental protection, appearance design and heat dissipation. There is an urgent need for a new type of sound-absorbing lamp technology to solve these problems in order to meet the market demand for high-quality sound-absorbing lamps. Summary of the Invention

[0009] The present invention overcomes the shortcomings of the prior art and provides a sound-absorbing lamp with an all-metal fine-convex microporous structure, which can broaden the sound absorption frequency. Made of metal, it has the advantages of being environmentally friendly, easy to treat the surface, and having good heat dissipation effect.

[0010] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: A sound-absorbing lamp with an all-metal fine-convex microporous structure comprises a housing with a bottom opening and a lamp trough within the housing for mounting a light source; the lamp trough is disposed at the lower portion of the housing; the housing comprises a shell frame formed of a micro-perforated metal sheet, a Z-shaped resonance plate disposed within the shell frame, and end cap assemblies disposed on the front and rear sides of the shell frame, the end cap assemblies and the shell frame jointly enclosing the Z-shaped resonance plate. The Z-shaped resonance plate divides the internal space of the shell frame into two acoustic chambers; the left and right sides of the shell frame are porous plate surfaces, and a plurality of micro-perforations are distributed on the porous plate surfaces; when sound waves enter the acoustic chamber through the micro-perforations, the Z-shaped resonance plate is stimulated to vibrate, causing the air molecules in the chamber to rub against the surface of the Z-shaped resonance plate and the inner wall of the chamber, converting the sound energy into heat energy consumption, thereby achieving sound absorption.

[0011] Furthermore, the end cover assembly includes a rectangular box body with a hollow interior and a flat end plate sealingly covering the open end of the box body, wherein the rectangular box body forms an accommodating space; the rectangular box body is embedded and fixed in the end opening of the shell frame in an interference fit manner.

[0012] Furthermore, the lower end edge of the shell frame is bent inward to form a horizontally extending lower bearing cross plate; the lamp trough includes a metal top plate adhered to the lower surface of the Z-shaped folded resonance plate, and the two side edges of the metal top plate extend downward and are connected to outward-inclined light guide inclined plates, the lower end of the light guide inclined plates is connected to a vertically downward longitudinal support plate, and the bottom of the longitudinal support plate is connected to a horizontally extending upper supporting cross plate; the upper supporting cross plate and the lower bearing cross plate form a local overlapping area in the vertical projection direction; an installation gap is provided between the upper supporting cross plate and the lower bearing cross plate for embedding a flat light-transmitting plate assembly.

[0013] Furthermore, the perforation rate P of the porous plate surface satisfies the following formula: in, l is the projected length of a single micro-perforation in the normal direction of the porous plate surface, unit: mm; w is the projection width of a single micro-perforation in the normal direction of the porous plate surface, unit: mm; n is the total number of micro-perforations contained in the single-sided porous radiation panel surface; L is the length of the porous radiation panel, unit: mm; W is the width of the porous radiation panel, unit: mm.

[0014] Furthermore, the lower bearing cross plate forms a bending structure, and the bending structure includes a bearing plate section located on the upper layer and an extension plate section located on the lower layer. The width ratio of the bearing plate section and the extension plate section satisfies: D1 / D2=0.6~0.8, wherein D1 is the width of the bearing plate section, and D2 is the width of the extension plate section; an arc transition structure is provided at the bending point of the bearing plate section and the extension plate section, and the radius of the transition arc is 1mm~3mm.

[0015] Furthermore, a high-temperature resistant epoxy resin adhesive layer is provided between the inner surface of the longitudinal support plate and the porous radiation panel surface of the shell frame.

[0016] Furthermore, the bending angle of the Z-shaped resonance plate is 72° to 76°; and the inclination angle of the light guide inclined plate is 55° to 65°.

[0017] Furthermore, the thickness of the Z-shaped resonance plate is 0.8mm~1.2mm and is made of aluminum alloy or stainless steel; the surface of the Z-shaped resonance plate is provided with a uniformly distributed micro-protrusion structure, and the height of the micro-protrusion structure is 0.1mm~0.3mm to increase the friction area of ​​the sound wave and improve the sound energy conversion efficiency; the micro-perforations are distributed in a staggered array on the surface of the porous plate to optimize the sound absorption coefficient of medium and high frequency sound waves.

[0018] Furthermore, the planar light-transmitting plate assembly includes a Lingjing plate and an anti-glare coating adhered to the lower surface of the Lingjing plate; the width of the installation gap is 1.3mm~2.2mm, and the installation gap is filled with an elastic buffer gasket to reduce vibration noise and protect the planar light-transmitting plate assembly.

[0019] Furthermore, it also includes a hanging module, which includes a load-bearing mounting member fixedly connected to the top of the box body, and a telescopic hanging rod detachably connected to the load-bearing mounting member to adjust the hanging height of the sound-absorbing lamp.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention utilizes an ultra-microporous metal plate and a rear cavity to create an ultra-microporous sound-absorbing structure. Leveraging the impedance characteristics of this ultra-microporous structure, it efficiently absorbs mid- and high-frequency sounds. Furthermore, the perforated plate and rear cavity form a resonant sound-absorbing structure, offering excellent selective absorption of mid- and low-frequency sounds. Compared to traditional sound-absorbing structures, this broadens the sound absorption frequency range and significantly improves the quieting effect.

[0021] 2. The present invention flexibly arranges two layers of perforated plates and two layers of cavities to achieve regulation of the sound absorption frequency width and sound absorption intensity, thereby adjusting the sound absorption frequency width and sound absorption intensity, that is, achieving adjustable sound absorption and selectable sound absorption.

[0022] 3. The sound-absorbing structure of the present invention is entirely composed of metal parts, and does not require the use of polyester fiber, glass wool and other materials, thereby fundamentally avoiding the environmental problems that may be caused by these materials, conforming to the concept of environmental protection, and having good environmental friendliness.

[0023] 4. Since the box is made of metal material, surface treatment can be carried out later. For example, it can be customized by spraying different colors, and can be targeted according to different usage scenarios and customer needs.

[0024] 5. The sound-absorbing structure of the present invention has good thermal conductivity and good metal heat dissipation effect, which can effectively dissipate the heat generated by lighting components, which is beneficial to maintaining the stable operating temperature of lighting components, extending their service life, and improving the reliability and stability of the lighting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and are used to explain the present invention together with the embodiments of the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 The three-dimensional sound-absorbing lamp of the present invention Figure 1 ; Figure 2 The three-dimensional sound-absorbing lamp of the present invention Figure 2 ; Figure 3 is a cross-sectional view of the sound-absorbing lamp of the present invention; Figure 4 is an exploded view of the sound-absorbing lamp of the present invention; Figure 5 Schematic diagram of the structure of the sound-absorbing lamp of the present invention with the end cover assembly removed; Figure 6 yes Figure 5 Side view of Figure 7 It is a partial schematic diagram of the light trough; Figure 8 yes Figure 6 Enlarged view of circle A in center.

[0026] In the figure: 1. Box body; 101. Shell frame; 1011. Perforated plate surface; 1012. Lower bearing horizontal plate; 10121. Bearing plate section; 10122. Extended plate section; 102. Z-shaped resonance plate; 2. Lamp trough; 201. Metal top plate; 202. Light guide inclined plate; 203. Longitudinal support plate; 204. Upper supporting horizontal plate; 205. Installation gap; 3. End cover assembly; 301. Rectangular box body; 302. Flat end plate. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example 1

[0028] like Figures 1 to 8 As shown, the present invention claims protection for an all-metal sound-absorbing lamp with a finely convex microporous structure. While providing lighting, it effectively absorbs sound waves, converting sound energy into heat, achieving the desired sound absorption and noise reduction effects. Specifically, the lamp comprises a housing with a bottom opening and a light trough within the housing for mounting a light source. The trough is located in the lower portion of the housing and provides the lighting infrastructure for the lamp.

[0029] The shell frame of the box is made of micro-perforated metal plates. The design of this micro-perforated metal plate allows sound waves to enter the interior of the box through the micro-perforations. The shell frame is made of a metal structure, and there is no need to use polyester fiber, glass wool and other materials as traditionally. This fundamentally avoids the environmental problems that these materials may cause, conforms to the concept of environmental protection, and has good environmental friendliness. A Z-shaped resonance plate is provided inside the shell frame, which divides the internal space of the shell frame into two acoustic chambers. The left and right sides of the shell frame are porous plate surfaces, and a plurality of micro-perforations are distributed on the porous plate surfaces. When sound waves enter the acoustic chamber through the micro-perforations, they will excite the Z-shaped resonance plate to vibrate, causing friction between the air molecules in the chamber and the surface of the Z-shaped resonance plate and the inner wall of the chamber, thereby converting sound energy into heat energy consumption, thereby realizing the sound absorption function.

[0030] The end cap assembly comprises a hollow rectangular box and a flat end plate that seals over the box's open end. The rectangular box forms a space for sound-absorbing material to enhance the sound-absorbing function. The rectangular box is inserted into the end opening of the housing frame with an interference fit, and together with the housing frame, it encloses the Z-shaped resonant plate, ensuring the stability and sealing of the internal structure.

[0031] In this embodiment, the lower edge of the housing frame is bent inward to form a horizontally extending lower support plate. The light trough comprises a metal top plate that fits over the lower surface of the Z-folded resonant plate. The two edges of the metal top plate extend downward and connect to outward-angled light guide plates. The lower ends of the light guide plates are connected to vertically downward-extending longitudinal support plates, and the bottoms of the longitudinal support plates are connected to horizontally extending upper support plates.

[0032] Combine Figure 6 as well as Figure 8 As can be seen, the upper supporting horizontal plate and the lower bearing horizontal plate partially overlap in the vertical projection direction, with a mounting gap provided between them for mounting the planar light-transmitting panel assembly. The planar light-transmitting panel assembly comprises a Lingjing panel and an anti-glare coating adhered to the lower surface of the Lingjing panel. In this embodiment, the Lingjing panel is made of acrylic. The mounting gap has a width of 1.3mm to 2.2mm, and in this embodiment, the mounting gap is 1.8mm wide. The mounting gap is filled with an elastic buffer gasket to reduce vibration and noise and protect the planar light-transmitting panel assembly.

[0033] In this embodiment, the perforation rate P of the porous plate surface satisfies the following formula: in, l is the projected length of a single micro-perforation in the normal direction of the porous plate surface, unit: mm; w is the projection width of a single micro-perforation in the normal direction of the porous plate surface, unit: mm; n is the total number of micro-perforations contained in the single-sided porous radiation panel surface; L is the length of the porous radiation panel, unit: mm; W is the width of the porous radiation panel, unit: mm.

[0034] It was found that when the perforation rate P of the porous plate surface is between 0.7% and 2.0%, the sound absorption effect is good.

[0035] The lower bearing cross plate forms a bending structure, which includes a bearing plate section located on the upper layer and an extension plate section located on the lower layer. The width ratio of the bearing plate section to the extension plate section satisfies: D1 / D2=0.6~0.8. In this embodiment, D1 / D2=0.6, where D1 is the width of the bearing plate section and D2 is the width of the extension plate section. The above design enables the lower bearing cross plate to distribute the force more evenly over the entire bending structure when bearing the weight of components such as the lamp trough and the flat light-transmitting plate assembly. A circular arc transition structure is provided at the bend between the bearing plate section and the extension plate section, and the transition arc radius is 1mm~3mm. In this embodiment, the transition arc radius is 2mm. During the bending process of the metal sheet, the radius is neither too small to increase the processing difficulty nor too large to affect the compactness and functionality of the structure.

[0036] A high-temperature resistant epoxy resin adhesive layer is provided between the inner surface of the longitudinal support plate and the porous radiation panel surface of the shell frame to ensure the stability and reliability of the connection between the lamp trough and the box.

[0037] The Z-shaped resonance plate has a bending angle of 72° to 76°. In this embodiment, the bending angle is 74.9°. This angle design facilitates the generation of appropriate vibrations under the action of sound waves, improving sound absorption. The inclined light guide plate has an inclination angle of 55° to 65°. In this embodiment, the inclination angle is 62°, which effectively guides light and achieves excellent lighting effects.

[0038] The Z-shaped resonance plate has a thickness of 0.8mm to 1.2mm and is made of aluminum alloy or stainless steel. In this embodiment, the thickness is 1.1mm, ensuring its strength and stability. The surface of the Z-shaped resonance plate is provided with a uniformly distributed micro-protrusion structure with a height of 0.1mm to 0.3mm. In this embodiment, the height of the micro-protrusion structure is 0.2mm, which increases the sound wave friction area and improves the sound energy conversion efficiency. Microperforations are distributed in a staggered array on the porous plate surface to optimize the sound absorption coefficient of medium and high-frequency sound waves. Example 2

[0039] The difference between Example 2 and Example 1 is that, based on Example 1, the sound-absorbing lamp also includes a hanging module, which includes a load-bearing mounting member fixedly connected to the top of the box body, and a telescopic hanging rod detachably connected to the load-bearing mounting member. The hanging height of the sound-absorbing lamp can be adjusted through the telescopic hanging rod to meet the usage requirements of different scenarios.

[0040] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sound-absorbing lamp with an all-metal fine-convex microporous structure, characterized by: The invention comprises a box body with a bottom opening, and a lamp trough located in the box body for mounting a light source; the lamp trough is arranged at the lower portion of the box body; the box body comprises a shell frame composed of a micro-perforated metal plate, a Z-shaped resonance plate is arranged inside the shell frame, and end cap assemblies are arranged on the front and rear sides of the shell frame, and the end cap assemblies and the shell frame together enclose the Z-shaped resonance plate; The Z-shaped resonance plate divides the internal space of the shell frame into two acoustic chambers; the left and right sides of the shell frame are porous plate surfaces, and a plurality of micro-perforations are distributed on the porous plate surfaces; when sound waves enter the acoustic chamber through the micro-perforations, the Z-shaped resonance plate is stimulated to vibrate, causing the air molecules in the chamber to rub against the surface of the Z-shaped resonance plate and the inner wall of the chamber, converting the sound energy into heat energy consumption, thereby achieving sound absorption.

2. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 1, characterized in that: The end cover assembly includes a rectangular box body with a hollow interior and a flat end plate sealingly covering the open end of the box body. The rectangular box body forms an accommodating space; the rectangular box body is embedded and fixed in the end opening of the shell frame in an interference fit manner.

3. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 1, characterized in that: The lower end edge of the shell frame is bent inward to form a horizontally extending lower bearing cross plate; the lamp trough includes a metal top plate adhered to the lower surface of the Z-folded resonance plate, and the two side edges of the metal top plate extend downward and are connected to outward-inclined light guide inclined plates, the lower end of the light guide inclined plates is connected to a vertically downward longitudinal support plate, and the bottom of the longitudinal support plate is connected to a horizontally extending upper supporting cross plate; the upper supporting cross plate and the lower bearing cross plate form a local overlapping area in the vertical projection direction; an installation gap is provided between the upper supporting cross plate and the lower bearing cross plate for embedding a flat light-transmitting plate assembly.

4. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 1, characterized in that: The perforation rate P of the porous plate surface satisfies the following formula: in, l is the projected length of a single micro-perforation in the normal direction of the porous plate surface, unit: mm; w is the projection width of a single micro-perforation in the normal direction of the porous plate surface, unit: mm; n is the total number of micro-perforations contained in the single-sided porous radiation panel surface; L is the length of the porous radiation panel, unit: mm; W is the width of the porous radiation panel, unit: mm.

5. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 3, characterized in that: The lower bearing cross plate forms a bending structure, which includes a bearing plate section located on the upper layer and an extension plate section located on the lower layer. The width ratio of the bearing plate section and the extension plate section satisfies: D1 / D2=0.6~0.8, where D1 is the width of the bearing plate section and D2 is the width of the extension plate section; an arc transition structure is provided at the bending point of the bearing plate section and the extension plate section, and the radius of the transition arc is 1mm~3mm.

6. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 3, characterized in that: A high-temperature resistant epoxy resin adhesive layer is provided between the inner surface of the longitudinal support plate and the porous radiation plate surface of the shell frame.

7. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 3, characterized in that: The bending angle of the Z-shaped resonance plate is 72° to 76°; the inclination angle of the light guide inclined plate is 55° to 65°.

8. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 4, characterized in that: The Z-shaped resonance plate has a thickness of 0.8mm to 1.2mm and is made of aluminum alloy or stainless steel; the surface of the Z-shaped resonance plate is provided with evenly distributed micro-protrusion structures, and the height of the micro-protrusion structures is 0.1mm to 0.3mm to increase the friction area of ​​the sound waves and improve the efficiency of sound energy conversion; the micro-perforations are distributed in a staggered array on the surface of the porous plate to optimize the sound absorption coefficient of medium and high frequency sound waves.

9. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 3, characterized in that: The flat light-transmitting plate assembly includes a Lingjing plate and an anti-glare coating adhered to the lower surface of the Lingjing plate; the width of the installation gap is 1.3mm~2.2mm, and the installation gap is filled with an elastic buffer gasket to reduce vibration noise and protect the flat light-transmitting plate assembly.

10. The all-metal sound-absorbing lamp with fine convex microporous structure according to claim 1, characterized in that: It also includes a hanging module, which includes a load-bearing mounting piece fixedly connected to the top of the box body, and a telescopic hanging rod detachably connected to the load-bearing mounting piece to adjust the hanging height of the sound-absorbing lamp.

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