Noise reduction components and water purifiers

Abstract

This invention discloses a noise reduction component and a water purifier, belonging to the field of noise reduction technology. The noise reduction component includes: a sound-absorbing panel, which includes a sound-absorbing surface and at least one sound-absorbing cavity group. The sound-absorbing cavity group includes multiple concave cavities extending from the sound-absorbing surface into the sound-absorbing panel, and at least two of the multiple concave cavities have different volumes; and a porous dielectric plate, at least a portion of which is disposed on the sound-absorbing surface and covers the sound-absorbing cavities. The noise reduction component according to embodiments of this invention is a composite acoustic noise reduction module design with multi-dimensional broadband noise reduction characteristics and impedance sound insulation function.

Description

Technical Field

[0001] This invention relates to the field of noise reduction technology, and in particular to a noise reduction component and a water purifier. Background Technology

[0002] As people's demands for quality of life continue to rise, water purifiers have become an essential piece of equipment in modern homes and commercial spaces. However, traditional water purifiers often generate significant noise during the water purification process due to factors such as the operation of high-pressure pumps, water flow impact, and pipe vibration, severely impacting the user experience. Currently, noise reduction measures for water purifiers on the market mainly rely on traditional passive noise reduction technologies such as sound-absorbing cotton, micro-perforated panels, and damping sound insulation panels. These materials have good absorption and attenuation effects on high-frequency sound wave components, but their ability to suppress low- and mid-frequency noise is relatively weak. In actual operating conditions, the noise spectrum of water purifiers often exhibits broadband characteristics, especially in the low- and mid-frequency range of 500Hz to 2000Hz, where noise energy is relatively concentrated, making it difficult for traditional sound-absorbing materials to effectively attenuate, resulting in poor overall noise reduction performance. Summary of the Invention

[0003] One objective of this invention is to propose a noise reduction component and a water purifier, which is a composite acoustic noise reduction module design with multi-dimensional broadband noise reduction characteristics and impedance sound insulation function.

[0004] A noise reduction component according to an embodiment of the present invention includes: a sound-absorbing plate, the sound-absorbing plate including a sound-absorbing surface and at least one sound-absorbing cavity group, the sound-absorbing cavity group including a plurality of recesses, the recesses extending from the sound-absorbing surface toward the sound-absorbing plate, at least two of the plurality of recesses having different volumes; and a porous dielectric plate, at least a portion of the porous dielectric plate being disposed on the sound-absorbing surface and covering the sound-absorbing cavities.

[0005] The noise reduction component according to an embodiment of the present invention is a composite acoustic noise reduction module design with multi-dimensional broadband noise reduction characteristics and impedance sound insulation function.

[0006] In addition, the noise reduction component according to the above embodiments of the present invention may also have the following additional technical features: The plurality of concave cavities are arranged in such a way that a plurality of large cavities surround a small cavity, wherein the volume of the large cavity is greater than the volume of the small cavity.

[0007] The plurality of cavities include a first cavity, a second cavity, a third cavity, a fourth cavity, a fifth cavity, a sixth cavity, a seventh cavity, an eighth cavity, and a ninth cavity with sequentially increasing volumes. The first cavity and the second cavity are arranged side by side, and the third cavity, the fourth cavity, the fifth cavity, the sixth cavity, the seventh cavity, the eighth cavity, and the ninth cavity are distributed around the first cavity and the second cavity.

[0008] Wherein, the depth dimension H of the plurality of cavities is ≥ 20 mm; and / or, the depth dimension of the plurality of cavities is the same.

[0009] The side lengths of the plurality of concave cavities are distributed in an arithmetic progression.

[0010] The i-th cavity is set as a square cavity and the side length Li satisfies Li=L1+(i-1)×d, where L1 is the side length of the smallest cavity, 8mm≤L1≤12mm, 1.5mm≤d≤3.5mm.

[0011] The sound-absorbing cavity group includes nine concave cavities; and / or, L1=10mm; and / or, d=2.5mm.

[0012] Wherein, the concave cavity is a square columnar cavity; and / or, the distance between adjacent concave cavities in the sound-absorbing cavity group is not greater than 1 mm.

[0013] The thickness h of the porous dielectric plate satisfies 2mm≤h≤5mm.

[0014] The porous medium includes porous cotton, porous membrane, or porous filter screen.

[0015] The sound-absorbing panel includes a base plate, a surrounding plate, and ribs. The surrounding plate is connected to the periphery of the base plate, and the ribs are located on the inner side of the surrounding plate and connected to the surrounding plate and the base plate. The ribs form the plurality of recesses on the inner side of the surrounding plate.

[0016] The sound-absorbing panel further includes a flange, which is connected to the side of the enclosure away from the bottom plate and extends outward from the enclosure. The periphery of the porous medium plate is stacked on the flange.

[0017] The sound-absorbing cavity group includes multiple groups, which are distributed flatly on the sound-absorbing panel.

[0018] A water purifier according to an embodiment of the present invention includes: a booster pump and the aforementioned noise reduction component, wherein the noise reduction component is distributed opposite to the booster pump, and the sound-absorbing surface faces the booster pump. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a noise reduction component according to an embodiment of the present invention.

[0020] Figure 2 This is a partial cross-sectional view of a noise reduction component according to an embodiment of the present invention.

[0021] Figure 3 This is a cross-sectional view of a noise reduction component according to an embodiment of the present invention.

[0022] Figure 4This is an exploded view of a noise reduction component according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of a sound-absorbing panel according to an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the sound-absorbing cavity assembly of a sound-absorbing panel according to an embodiment of the present invention.

[0025] Figure 7 This is a simulation of the sound absorption domain of a sound-absorbing cavity assembly according to an embodiment of the present invention.

[0026] Figure 8 This is a simulation of the sound pressure isosurface of a sound-absorbing cavity assembly according to an embodiment of the present invention.

[0027] Figure 9 This is a simulation of the sound pressure level of a sound-absorbing cavity assembly according to an embodiment of the present invention.

[0028] Figure 10 This is a simulation curve of the sound absorption coefficient of a sound-absorbing cavity assembly according to an embodiment of the present invention.

[0029] Figure 11 This is an exploded schematic diagram of a water purifier according to an embodiment of the present invention.

[0030] Figure 12 This is a cross-sectional view of a water purifier according to an embodiment of the present invention.

[0031] Figure label: Noise reduction component 10, sound-absorbing panel 11, base plate 111, surrounding panel 112, flange 1121, rib 113, ear part 114, reinforcing rib 115, screw hole 117, sound-absorbing cavity group 118, sound-absorbing surface 110, first concave cavity 1101, second concave cavity 1102, third concave cavity 1103, fourth concave cavity 1104, fifth concave cavity 1105, sixth concave cavity 1106, seventh concave cavity 1107, eighth concave cavity 1108, ninth concave cavity 1109, porous medium plate 12, water purifier 100, booster pump 20, outer shell 30. Detailed Implementation

[0032] Water purifiers often exhibit a wide noise spectrum, particularly concentrated in the low-to-mid frequency range of 500Hz to 2000Hz. Traditional sound-absorbing materials struggle to effectively attenuate this noise, resulting in poor overall noise reduction. Furthermore, current noise reduction solutions typically rely on increasing the thickness or weight of sound insulation materials. This not only increases product size and cost but may also negatively impact heat dissipation and ease of maintenance. With consumers increasingly demanding quiet operation, there is a pressing need for a more efficient noise reduction technology that effectively covers the entire frequency range. This would improve the quietness of water purifiers, especially enhancing sound absorption in the low-to-mid frequency range, thus meeting users' desire for a comfortable user experience and optimizing the overall quietness of the water purifier, ultimately improving user comfort.

[0033] This invention belongs to the field of noise reduction technology for water purifiers, specifically involving the design of a composite acoustic noise reduction module with multi-dimensional broadband noise reduction characteristics and impedance sound insulation function. Therefore, this invention develops a novel broadband noise reduction technology, namely a composite acoustic noise reduction structure. By optimizing the acoustic structure of the water purifier, the broadband noise problem of existing water purifiers is effectively solved, while also achieving lightweight, low cost, and high-efficiency noise reduction, becoming a key noise reduction technology measure in the water purifier industry.

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] This invention designs a composite acoustic noise reduction structure that integrates an acoustic cavity and a porous medium into a composite module. It prioritizes the multi-dimensional noise reduction acoustic cavity, adapts to a modular array, and covers with porous media to effectively reduce the low-to-mid-frequency noise generated by the water purifier during operation. This significantly improves the overall noise level of the water purifier and effectively solves the sound quality problem in the user's environment.

[0036] like Figures 1 to 6According to an embodiment of the present invention, a noise reduction component 10 includes a sound-absorbing plate 11. The sound-absorbing plate 11 includes a sound-absorbing surface 110 and at least one sound-absorbing cavity group 118. The sound-absorbing cavity group 118 includes a plurality of recesses (1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109), which extend from the sound-absorbing surface 110 toward the interior of the sound-absorbing plate 11. The sound-absorbing plate 11 has recesses that are open in the sound-absorbing surface 110. Each recess may include a side surface and a bottom surface. The sound-absorbing surface 110 has an opening. One periphery of one side surface is connected to the periphery of the opening, and the other periphery of the side surface is connected to the periphery of the bottom surface. The bottom surface closes the other end of the side surface. At least two of the recesses have different volumes. Recesses with different volumes, different depths, or different opening areas have different sound absorption effects. By providing at least two recesses with different volumes, sound absorption of noise at different frequencies can be achieved, thus realizing broadband sound absorption.

[0037] like Figures 1 to 4 The noise reduction component 10 also includes a porous dielectric plate 12, at least a portion of which is disposed on the sound-absorbing surface 110 and covers the sound-absorbing cavity. After passing through the porous dielectric plate 12, the noise is partially eliminated, and then enters the cavity for further elimination. Moreover, the combination of the porous dielectric plate 12 and the cavity can further improve the noise reduction effect and achieve a wider frequency band noise reduction.

[0038] The noise reduction component 10 according to the present invention, through the combination of the porous dielectric plate 12 and the sound absorption cavity group 118, can improve the noise reduction effect, and can be designed as a composite acoustic noise reduction module with multi-dimensional broadband noise reduction characteristics and impedance sound insulation function.

[0039] Porous dielectric plate 12 (or porous sound-absorbing material / assembly) is a high-efficiency industrial noise reduction component, widely used in aerodynamic equipment, exhaust systems, and air ducts. Its working principle and application characteristics are as follows: 1. Working Principle (Throttling and Sound Absorption) Throttling and Pressure Reduction: Porous materials (such as sound-absorbing plates, foamed metal) have numerous micropores. When high-speed airflow passes through, the airflow undergoes throttling and pressure distribution within the porous structure, thereby reducing airflow speed and kinetic energy, and decreasing noise caused by eddies. Micro-perforated Sound Absorption: Utilizing multiple sound-absorbing cavities and perforated tubes within the silencer, based on the Helmholtz resonance principle, sound wave energy is absorbed at specific frequencies. Sound Wave Loss: When sound waves pass through the complex path within the porous medium, they rub against the material and generate internal heat dissipation, thus consuming sound energy.

[0040] Optionally, the volume of each cavity in the sound-absorbing cavity group 118 is different, thereby achieving wider-bandwidth noise reduction and further improving the noise reduction effect. Furthermore, at least two of the cavities may have different volumes, which could include at least two cavities having different opening areas; more specifically, all cavities may have different opening areas. The opening area and shape of the cavity can be the same as the cross-sectional area and shape of the cavity. The cross-section of the cavity refers to a section perpendicular to the cavity axis; or a section perpendicular to the opening axis of the cavity; or a section perpendicular to the absorption surface. The cross-sectional area of ​​the cavity refers to the area of ​​the space enclosed by the sides of the cavity within its cross-section.

[0041] In this invention, the shape of the concave cavity can be rectangular, square, circular, or elliptical, or other shapes. That is, the cross-section of the concave cavity can be rectangular, square, circular, elliptical, or other shapes.

[0042] like Figure 5 In some embodiments, multiple cavities are arranged such that a larger cavity surrounds a smaller cavity, with the volume of the larger cavity being greater than the volume of the smaller cavity. That is, the multiple cavities can be divided into a first group and a second group, wherein the volume of the cavities in the first group is greater than the volume of the cavities in the second group. The sound-absorbing cavity group 118 is allocated such that the cavities of the first group are distributed around the cavities of the second group. The first group may include multiple cavities, and the second group may include one or more cavities. Furthermore, the volumes of the multiple cavities in the first group may be the same or different, and when the second group includes multiple cavities, the volumes of the multiple cavities in the second group may also be the same or different.

[0043] In addition, such as Figure 5 In one optional embodiment, the plurality of cavities include a first cavity 1101, a second cavity 1102, a third cavity 1103, a fourth cavity 1104, a fifth cavity 1105, a sixth cavity 1106, a seventh cavity 1107, an eighth cavity 1108, and a ninth cavity 1109, with the volume increasing sequentially. The first cavity 1101 and the second cavity 1102 are arranged side by side, and the third cavity 1103, the fourth cavity 1104, the fifth cavity 1105, the sixth cavity 1106, the seventh cavity 1107, the eighth cavity 1108, and the ninth cavity 1109 are distributed around the first cavity 1101 and the second cavity 1102.

[0044] This invention features multi-dimensional broadband noise reduction and impedance sound insulation. Through the design of a composite acoustic noise reduction module, the sound absorption cavity group 118 has a standard layout of 9 cavities, with a large cavity surrounding a small cavity, 1 central cavity + 8 surrounding cavities, and the surface is covered with a porous dielectric material structure, which can improve the noise reduction effect. When this noise reduction component 10 is applied to the booster pump 20 of the water purifier 100, it can effectively reduce the low and mid-bandwidth noise generated by the booster pump 20 of the water purifier 100 during operation.

[0045] Furthermore, the sound-absorbing cavity group 118 in this invention is configured as a multi-dimensional acoustic cavity unit array to form a noise reduction module. Each unit contains 9 concave cavities, and the volume of the first i-th concave cavity is Vi (i=1, 2, 3, 4, 5, 6, 7, 8, 9). The core arrangement principle of the 9 cavities is as follows: large cavities (low-frequency cavities) surround the periphery, and small cavities (mid-high-frequency cavities) are arranged in the center. From the outside to the inside: large cavity → medium cavity → small cavity, the acoustic impedance transitions smoothly, and the resonant frequencies of each cavity do not interfere with each other but are coupled and superimposed to eliminate frequency valleys. The acoustic impedance gradient formed by the cavity gradient (larger on the outside and smaller on the inside) and the layered absorption of the sound field achieve low / mid / high frequency full-band coupling noise reduction. Among them, the standard arrangement of the 9 cavities is: 1 central cavity + 8 surrounding cavities; the size gradient is: the outer 8 cavities gradually decrease in size, and the central cavity is the smallest; the frequency gradient is: the periphery mainly targets low and sub-low frequencies, and the center mainly targets mid and high frequencies. Multi-cavity resonant coupling achieves full-range broadband noise reduction. The module size and number of units can be adjusted to meet the noise reduction needs of different frequencies and scenarios.

[0046] Of course, the number of concave cavities in the multi-absorption cavity group 118 in this invention is not limited. The above description is merely an example of some quantities and distribution forms of this invention, and is not a limitation on the scope of protection of this invention.

[0047] like Figure 3 The depth H of the multiple cavities is ≥20mm. As mentioned earlier, the noise frequency of the booster pump 20 is typically in the range of 500Hz to 2000Hz. To achieve a wideband noise reduction effect of 500Hz to 2000Hz, the multi-dimensional sound-absorbing cavity assembly 118 needs to design noise reduction cavities Vi (i=1, 2, 3, ...) with different volumes. The cavity volume Vi=Li×Li×H, and the deeper the cavity, the better the noise reduction effect. Preferably, the minimum value of the cavity depth H can be set to ≥20mm, which can improve the noise reduction effect of the noise reduction component 10.

[0048] In addition, the depth of multiple cavities can be set to be the same. This simplifies the structure of the sound-absorbing panel 11, facilitates its processing and manufacturing, and optimizes its noise reduction effect.

[0049] As an alternative implementation, at least two of the multiple cavities have different opening areas.

[0050] Optionally, to further improve the noise reduction effect, the volume distribution of the multiple cavities can be limited to achieve better noise reduction. As one implementation, the side lengths of the multiple cavities in this invention are distributed in an arithmetic progression. That is, the cavities can be polygonal in shape, such as equilateral triangles, squares, pentagons, or hexagons. The shape of the cavities can be the shape projected along the axis of the opening. Furthermore, it should be noted that due to manufacturing or processing errors, there may be a certain difference in the side lengths of the cavities. When the difference in side length is less than 10%, the cavity can also be considered equilateral. A certain degree of error is also allowed in the distribution of the side lengths of the multiple cavities. These should all be within the scope of protection of this invention.

[0051] Of course, the shape of the cavity in this invention is not limited to the above description. The above description is merely some implementation methods of this invention and is not a limitation on the scope of protection of this invention. For example, the cavity can also be set as a circle. When multiple cavities are set as circles, the radii of the multiple cavities can be set to be evenly distributed. Another example is that the cavity can be set as a rectangle.

[0052] In addition, the shapes of the multiple concave cavities in the sound-absorbing cavity group 118 of the present invention can be the same or different. For example, one of the multiple concave cavities can be set as a triangle and the other as a quadrilateral.

[0053] In a specific embodiment, such as Figure 5 Multiple cavities are arranged in a square shape. The side length Li of the i-th cavity is given by various factors, such as L1 for the first cavity, L2 for the second cavity, and Ln for the nth cavity. The side length of the first, second, ..., nth cavities gradually increases, with L1 being the minimum side length of the first cavity. The equation Li = L1 + (i-1) × d holds, where L1 is the minimum side length of the cavity, 8mm ≤ L1 ≤ 12mm, and 1.5mm ≤ d ≤ 3.5mm. Alternatively, L1 = 10mm ± 2mm, and d = 2.5mm ± 1mm.

[0054] Optionally, the sound-absorbing cavity assembly 118 includes nine recessed cavities; and / or, L1 = 10 mm; and / or, d = 2.5 mm. This can further and effectively improve noise reduction capabilities.

[0055] For example, such as Figure 6The cavity comprises a first cavity 1101, a second cavity 1102, a third cavity 1103, a fourth cavity 1104, a fifth cavity 1105, a sixth cavity 1106, a seventh cavity 1107, an eighth cavity 1108, and a ninth cavity 1109, with the volume increasing sequentially. The side length of the first cavity 1101 is L1 = 10 mm; the side length of the second cavity 1102 is L2 = L1 + (2-1) × 2.5 mm = 10 mm + 1 × 2.5 mm = 12.5 mm; the side length of the third cavity 1103 is L3 = L1 + (3-1) × 2.5 mm = 10 mm + 2 × 2.5 mm = 15 mm; and the side length of the fourth cavity 1104 is L4 = L1 + (4-1) × 2.5 mm = 10 mm + 3 × 2.5 mm. 5mm = 17.5mm; the side length of the fifth cavity 1105 is L5 = L1 + (5-1) × 2.5mm = 10mm + 4 × 2.5mm = 20mm; the side length of the sixth cavity 1106 is L6 = L1 + (6-1) × 2.5mm = 10mm + 5 × 2.5mm = 22.5mm; the side length of the seventh cavity 1107 is L7 = L1 + (7-1) × 2.5mm = 10mm + 6 × 2.5mm = 25mm; the side length of the eighth cavity 1108 is L8 = L1 + (8-1) × 2.5mm = 10mm + 7 × 2.5mm = 27.5mm; the side length of the ninth cavity 1109 is L9 = L1 + (9-1) × 2.5mm = 10mm + 8 × 2.5mm = 30mm.

[0056] Of course, the above description is merely some implementations of the present invention and is not intended to limit the scope of protection of the present invention. The number of cavities, minimum cavity side length, tolerance value, and error value in the sound-absorbing cavity group 118 of the present invention can also be set to other values, and these should all be within the scope of protection of the present invention.

[0057] The rectangular side lengths Li of each cavity need to satisfy an arithmetic progression, with a tolerance of d = 2.5 mm. Li = L1 + (i-1) * d, and the minimum cavity side length parameter range is L1 = 10 ± 2 mm. φ_s is the effective area porosity of the porous medium material (e.g., 0 < 5 φ_s < 1). The relationship between the structural parameters and the resonant noise reduction frequency is f_i ∝ √(φ_s / (V_(i ) H)). Therefore, as the number of cavity side lengths Li increases arithmetic progression and the cavity volume Vi increases squarely, the resonant noise reduction frequency fi decreases inversely according to a parabola. f1:f2……:f9 = √(φ_s / (V_(1 ) H)):√(φ_s / (V_(2 ) H))……: √(φ_s / (V_(9 )) H)) satisfies the requirement that as the depth and volume of the anechoic cavity increase, its resonant frequency gradually decreases, and low-frequency sound waves, due to their long wavelength and high energy, must rely on a larger volume cavity to achieve effective resonant energy storage and sound energy dissipation and absorption.

[0058] like Figure 6 In some embodiments, the recessed cavity is a square cylindrical cavity; and / or, the distance between adjacent recessed cavities in the sound-absorbing cavity group 118 is no greater than 1 mm. This enables further effective noise reduction, reduces noise transmitted through the noise reduction component 10, and improves the noise reduction effect.

[0059] like Figure 3 In some embodiments, the thickness h of the porous dielectric plate 12 satisfies 2mm≤h≤5mm. The surface of the sound-absorbing cavity assembly 118 needs to be covered with a porous dielectric material, such as cotton, film, or filter, with a thickness of 2mm≤h≤5mm to ensure sound transmission into the cavity and achieve viscous dissipation characteristics inside.

[0060] Porous media include porous cotton, porous membranes, or porous filters.

[0061] like Figure 5 In some embodiments, the sound-absorbing cavity group 118 includes multiple groups, which are laid out flat on the sound-absorbing panel 11. The multiple laid-out sound-absorbing cavity groups 118 can provide a wider range of noise reduction and sound attenuation, improve the sound attenuation effect, and achieve large-area sound attenuation.

[0062] like Figure 3 In some embodiments, the sound-absorbing panel 11 includes a base plate 111, a surrounding plate 112, and ribs 113. The surrounding plate 112 is connected to the periphery of the base plate 111, and the ribs 113 are located inside the surrounding plate 112 and connected to both the surrounding plate 112 and the base plate 111. The ribs 113 form multiple cavities inside the surrounding plate 112. For example, the combination of the surrounding plate 112, ribs 113, and base plate 111 can form a structurally reliable sound-absorbing panel 11, which is easy to process, has high structural strength, and can improve noise reduction effect.

[0063] like Figure 5 The sound-absorbing panel 11 may include multiple sets of ribs 113, which are laid flat on the inner side of the enclosure panel 112. For example, the multiple sets of ribs 113 are arranged in a matrix on the inner side of the enclosure panel 112. Each set of ribs 113 constructs a sound-absorbing cavity group 118, and the multiple sets of ribs 113 construct multiple sound-absorbing cavity groups 118. The multiple sets of ribs 113 are all connected to the base plate 111, and the multiple sets of ribs 113 are directly or indirectly connected to the enclosure panel 112. The sound-absorbing panel 11 has high overall structural strength.

[0064] like Figure 5 The sound-absorbing panel 11 further includes a flange 1121, which connects to the side of the enclosure 112 away from the bottom plate 111 and extends outward from the enclosure 112. The periphery of the porous dielectric plate 12 is stacked on the flange 1121. This facilitates the assembly and fixing of the sound-absorbing panel 11 and the porous dielectric plate 12, improves the service life of the noise reduction assembly 10, and enhances the noise reduction effect.

[0065] The side of the rib 113 away from the bottom plate 111 can be flush with the side of the enclosure 112 away from the bottom plate 111. The porous medium plate 12 is stacked on the side of the rib 113 away from the bottom plate 111 and the flange 1121.

[0066] The composite acoustic noise reduction structure designed in this invention uses numerical simulation to parametrically design the unit size and arrangement, such as... Figures 7 to 9 As shown, Figure 7 This is a simulation of the 118 sound absorption zones of the sound absorption cavity assembly. Figure 8 This is a simulation of the sound pressure isosurface of the sound-absorbing cavity assembly 118. Figure 9 This is a sound pressure level simulation of the 118 sound-absorbing cavity assembly. Different acoustic units correspond to different sound pressure relationships, and the sound pressure level contour plot clearly shows this change in energy distribution. Smaller resonant cavities typically correspond to higher resonant frequencies, and the high sound pressure level region in the contour plot will show a more localized energy concentration; while larger resonant cavities have lower resonant frequencies, and the sound pressure level contour plot may show a smoother sound energy diffusion and a wider high-pressure distribution. This relationship can be visually presented through numerical simulation or experimental measurement, providing a visual basis for noise control or acoustic design.

[0067] Through optimal design, the final acoustic cavity arrangement scheme was obtained, and the simulated sound absorption coefficient curve is shown below. Figure 10 As shown in the figure, the coefficient value is ≥0.7 in the 500Hz~2000Hz range, indicating a high sound energy dissipation characteristic of the resonant cavity. In contrast, the existing sound-absorbing cotton and damping materials have a coefficient value of only 0.4~0.5, thus improving the sound absorption performance and meeting the current low-to-mid-frequency noise reduction requirements.

[0068] like Figure 11 and Figure 12 According to an embodiment of the present invention, a water purifier 100 includes a booster pump 20 and the aforementioned noise reduction component 10. The noise reduction component 10 is distributed opposite to the booster pump 20, and the sound-absorbing surface 110 faces the booster pump 20. The composite broadband acoustic noise reduction structure designed in this invention can not only effectively reduce the noise generated by the booster pump 20 of the water purifier 100, but also has good broadband noise reduction adaptation and suppression capabilities for low and mid-frequency noise sources of various devices.

[0069] like Figure 11 and Figure 12The water purifier 100 may further include a housing 30, with a booster pump 20 disposed within the housing 30. The housing 30 has screw posts on both sides perpendicular to the axis of the booster pump 20. A sound-absorbing plate 11 has ears 114 on both sides, each ear having screw holes 117. The sound-absorbing plate 11 is positioned to the side of the booster pump 20, with the screw holes 117 corresponding to the screw posts of the housing 30, allowing the sound-absorbing plate 11 to be positioned on the housing 30 using screws. Both sides of the sound-absorbing plate 11 have multiple ears 114 and reinforcing ribs 115. The reinforcing ribs 115 connect the multiple ears 114 together and improve their structural strength, facilitating the stable installation of the noise reduction assembly 10 onto the housing 30.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A noise reduction component (10), characterized in that, include: A sound-absorbing panel (11) includes a sound-absorbing surface (110) and at least one sound-absorbing cavity group (118). The sound-absorbing cavity group (118) includes a plurality of recesses extending from the sound-absorbing surface (110) toward the sound-absorbing panel (11). At least two of the plurality of recesses have different volumes. A porous dielectric plate (12), at least a portion of which is disposed on the sound-absorbing surface (110) and covers the sound-absorbing cavity.

2. The noise reduction component (10) according to claim 1, characterized in that, The multiple cavities are arranged in such a way that a large cavity surrounds a small cavity, and the volume of the large cavity is greater than the volume of the small cavity.

3. The noise reduction component (10) according to claim 2, characterized in that, The plurality of cavities include a first cavity (1101), a second cavity (1102), a third cavity (1103), a fourth cavity (1104), a fifth cavity (1105), a sixth cavity (1106), a seventh cavity (1107), an eighth cavity (1108), and a ninth cavity (1109) with sequentially increasing volumes. The first cavity (1101) and the second cavity (1102) are arranged side by side, and the third cavity (1103), the fourth cavity (1104), the fifth cavity (1105), the sixth cavity (1106), the seventh cavity (1107), the eighth cavity (1108), and the ninth cavity (1109) are distributed around the first cavity (1101) and the second cavity (1102).

4. The noise reduction component (10) according to any one of claims 1-3, characterized in that, The depth dimension H of the plurality of cavities is ≥20mm; and / or, the depth dimension of the plurality of cavities is the same.

5. The noise reduction component (10) according to any one of claims 1-3, characterized in that, At least two of the plurality of cavities have different opening areas.

6. The noise reduction component (10) according to any one of claims 1-3, characterized in that, The side lengths of the multiple cavities are distributed in an arithmetic progression.

7. The noise reduction component (10) according to claim 6, characterized in that, The i-th cavity is set as a square cavity and the side length Li satisfies Li=L1+(i-1)×d, where L1 is the side length of the smallest cavity, 8mm≤L1≤12mm, 1.5mm≤d≤3.5mm.

8. The noise reduction component (10) according to claim 7, characterized in that, The sound-absorbing cavity group (118) includes nine of the aforementioned cavities; and / or, L1 = 10 mm; and / or, d = 2.5 mm.

9. The noise reduction component (10) according to any one of claims 1-3, characterized in that, The cavity is a square columnar cavity; and / or, the distance between adjacent cavities in the sound-absorbing cavity group (118) is not greater than 1 mm.

10. The noise reduction component (10) according to claim 1, characterized in that, The thickness h of the porous medium plate (12) satisfies 2mm≤h≤5mm; and / or the porous medium includes porous cotton, porous film or porous filter.

11. The noise reduction component (10) according to claim 1, characterized in that, The sound-absorbing panel (11) includes a base plate (111), a surrounding plate (112), and ribs (113). The surrounding plate (112) is connected to the periphery of the base plate (111). The ribs (113) are located inside the surrounding plate (112) and are connected to the surrounding plate (112) and the base plate (111). The ribs (113) form the plurality of cavities inside the surrounding plate (112).

12. The noise reduction component (10) according to claim 11, characterized in that, The sound-absorbing panel (11) also includes a flange (1121) that connects to the side of the enclosure (112) away from the bottom plate (111) and extends outward from the enclosure (112). The periphery of the porous medium plate (12) is stacked on the flange (1121).

13. The noise reduction component (10) according to any one of claims 1-3, characterized in that, The sound-absorbing cavity group (118) includes multiple groups, and the multiple sound-absorbing cavity groups (118) are laid out flat on the sound-absorbing plate (11).

14. A water purifier (100), characterized in that, include: Booster pump (20); The noise reduction component (10) according to any one of claims 1-13, wherein the noise reduction component (10) is distributed opposite to the booster pump (20), and the sound-absorbing surface (110) faces the booster pump (20).

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