Noise reduction component and range hood

Abstract

The present application discloses a noise reduction component and a range hood. The noise reduction component includes a plurality of noise reduction elements. Each noise reduction element includes a housing and a connecting plate. The housing forms a receiving cavity, and one side of the housing is provided with a microporous structure. The connecting plate is disposed in the receiving cavity so that the receiving cavity forms a meandering channel, and the meandering channel communicates with the microporous structure. Among them, the plurality of noise reduction elements are arranged side by side, and the ends of the plurality of noise reduction elements with the microporous structure are arranged in the same direction. The noise reduction component of the present application not only has a simple structure, but also has a better noise reduction effect.

Description

Technical Field

[0001] The present application relates to the field of household appliances, and particularly to a noise reduction component and a range hood. Background Art

[0002] With the improvement of user requirements, the oil suction range hood needs to reduce the noise during operation on the premise of meeting the core indicators such as air volume and static pressure. As the main noise source of the oil suction range hood, the aerodynamic noise generated by the fan system will be transmitted to the human ear through the air duct and the suction inlet of the oil suction range hood. Therefore, adding an acoustic absorption structure in the air duct can effectively reduce the overall noise of the oil suction range hood.

[0003] In the existing solutions, an acoustic absorption resonance cavity is added to the inner wall surface of the air duct. In order to broaden the acoustic absorption frequency band, a porous acoustic absorption material is filled in the cavity to broaden the acoustic absorption frequency band. The existing acoustic absorption resonance cavity has a complex structure and poor acoustic absorption effect. Summary of the Invention

[0004] The present application provides a noise reduction component and a range hood to solve the problem that an acoustic absorption resonance cavity is added to the inner wall surface of the air duct, and the structure of the acoustic absorption resonance cavity is complex and the acoustic absorption effect is poor.

[0005] To solve the above technical problems, the present application proposes a noise reduction component, which includes a plurality of noise reduction elements. Each noise reduction element includes: a housing having an accommodation cavity formed therein, and a microporous structure provided on one side of the housing; a connecting plate disposed in the accommodation cavity to form a meandering channel in the accommodation cavity, and the meandering channel communicates with the microporous structure; wherein, the plurality of noise reduction elements are arranged side by side, and the ends of the plurality of noise reduction elements provided with the microporous structure are arranged in the same direction.

[0006] Further, the microporous structure includes a plurality of micropores, and the microporous structures of at least two of the plurality of noise reduction elements are different.

[0007] Further, the housing includes a first surface and a second surface that are located on the same side and are connected at an obtuse angle. The microporous structure includes a first microporous structure and a second microporous structure. The first microporous structure is provided on the first surface, and the second microporous structure is provided on the second surface.

[0008] Further, the first microporous structure and the second microporous structure are different.

[0009] Further, the connecting plate includes a first spiral plate and a second spiral plate. One ends of the first spiral plate and the second spiral plate are connected to each other, and the first spiral plate and the second spiral plate are spirally wound around each other to form a first meandering channel and a second meandering channel. The first meandering channel communicates with the first microporous structure, and the second meandering channel communicates with the second microporous structure.

[0010] Further, the extension depth of the first meandering channel and the second meandering channel is greater than or equal to 60 mm and less than or equal to 120 mm.

[0011] Further, the microporous structure includes a plurality of micropores, the pore diameter of the micropores ranges from greater than or equal to 0.6 mm to less than or equal to 1 mm; the porosity range of one side of the housing is from greater than or equal to 2% to less than or equal to 10%; the noise reduction frequency range of the noise reduction component is from greater than or equal to 150 Hz to less than or equal to 500 Hz.

[0012] To solve the above technical problems, the present application provides a range hood, which includes: a box body forming an accommodation space, and the box body is provided with a smoking port; a fan assembly located in the accommodation space; the above-mentioned noise reduction component is arranged between the fan assembly and the smoking port for reducing the noise generated by the fan assembly.

[0013] Further, a plurality of microporous structures in the noise reduction component are arranged towards the fan assembly.

[0014] Further, the noise reduction components are arranged side by side in a first direction, wherein the first direction is parallel to the plane where the smoking port is located.

[0015] Further, the ratio of the area of the orthographic projection of the noise reduction component on the surface where the smoking port is located to the area of the smoking port is greater than or equal to 50% and less than or equal to 75%.

[0016] The noise reduction component of the present application includes a plurality of noise reduction elements. Each noise reduction element includes a housing and a connecting plate. The housing forms an accommodation cavity, and a microporous structure is arranged on one side of the housing; the connecting plate is arranged in the accommodation cavity, and the connecting plate makes the accommodation cavity form a meandering channel, and the meandering channel communicates with the microporous structure. Through the mutual cooperation of the meandering channel and the microporous structure, noise can be reduced, and the structure of the noise reduction component is simple. Further, a plurality of noise reduction elements are arranged side by side, and the ends of the plurality of noise reduction elements provided with the microporous structures are arranged in the same direction, further increasing the noise reduction effect. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:

[0018] Figure 1 is a schematic structural diagram of the noise reduction component of the present application;

[0019] Figure 2 is Figure 1 a cross-sectional schematic diagram of the noise reduction element in the shown noise reduction component;

[0020] Figure 3 is a cross-sectional view of the range hood of the present application;

[0021] Figure 4 is Figure 3 a bottom view of the shown range hood.

[0022] Reference numerals in the drawings: 10, noise reduction element; 1, housing; 11, accommodation cavity; 12, microporous structure; 121, micropores; 13, connecting plate; 131, first spiral plate; 132, second spiral plate; 14, meandering channel; 141, first meandering channel; 142, second meandering channel; 15, first surface; 16, second surface; 100, noise reduction assembly; 200, range hood; 201, box body; 2001, accommodation space; 2002, smoke extraction port; 202, fan assembly. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0024] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0026] The current range hood broadens the sound absorption frequency band by adding sound absorption resonance cavities on the wall surface in the air duct and filling porous sound absorption materials in the sound absorption resonance cavities, that is, the overall sound absorption resonance cavity has a complex structure. The noise reduction component provided by this application has a simple structure and a good noise reduction effect. The following describes in detail a noise reduction component and a range hood provided by the present invention in conjunction with embodiments.

[0027] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of the noise reduction component of this application; Figure 2 is Figure 1 a schematic cross-sectional view of the noise reduction element in the noise reduction component shown.

[0028] In this embodiment, the noise reduction component 100 includes a plurality of noise reduction elements 10. The noise reduction element 10 includes a housing 1 and a connecting plate 13. A microporous structure 12 is provided on one side of the housing 1. The microporous structure 12 is used for noise to enter, that is, external noise enters the housing 1 through the microporous structure 12 on the surface of the housing 1. The housing 1 forms a receiving cavity 11. The receiving cavity 11 provides an installation position for the connecting plate 13, so that the connecting plate 13 is arranged in the receiving cavity 11. The connecting plate 13 forms a meandering channel 14 in the receiving cavity 11. The meandering channel 14 increases the movement path of the noise. The meandering channel 14 communicates with the microporous structure 12, that is, through the mutual cooperation of the meandering channel 14 and the microporous structure 12, the noise enters the receiving cavity 11 through the microporous structure 12 and moves along the meandering channel 14, thereby performing noise reduction processing on the noise. The above-mentioned meandering channel 14 is a winding channel.

[0029] The number of the above-mentioned noise reduction elements 10 can be one, two or more, and its number can be determined according to the actual application scenario. When there are multiple noise reduction elements 10, the noise reduction elements 10 are arranged side by side to increase the noise reduction area. At the same time, one end of the multiple noise reduction elements 10 provided with the microporous structure 12 is arranged in the same direction to simultaneously perform noise reduction processing on the noise formed in a specific direction.

[0030] The structures of the multiple noise reduction elements 10 in the above-mentioned noise reduction component 100 can be completely the same, or the structures of the multiple noise reduction elements 10 can be completely different, or the structures of some of the multiple noise reduction elements 10 are the same and the structures of the other part of the noise reduction elements 10 are different. When the structures of the multiple noise reduction elements 10 are the same, noise reduction processing can be performed on the noise within the same frequency range. When the structures of the multiple noise reduction elements 10 are different, noise reduction processing can be performed on the noise within different frequency ranges, increasing the noise reduction frequency range. In addition, the structures of the microporous structures 12 at different positions on the noise reduction element 10 can be different, and noise reduction processing can be performed on the noise within different frequency ranges, increasing the noise reduction frequency range.

[0031] Specifically, two, three, or more noise reduction elements 10 are different. The structures of the multiple noise reduction elements 10 can be different through the microporous structure 12, thereby broadening the noise reduction frequency bandwidth range. Since the microporous structure 12 includes micropores 121, the structures of different noise reduction elements 10 can be made different by changing the structure of the micropores 121. For example, the pore size and / or porosity of the micropores 121 can be changed. Thus, according to the noise reduction frequency of the noise, the structure of the microporous structure 12 on the appropriate noise reduction element 10 can be selected to perform noise reduction processing on the noise.

[0032] Furthermore, the housing 1 includes a first surface 15 and a second surface 16. The first surface 15 and the second surface 16 are on the same side and are arranged at an obtuse angle to each other. The microporous structure 12 includes a first microporous structure (not shown in the figure) and a second microporous structure (not shown in the figure). The first microporous structure is provided on the first surface 15, and the second microporous structure is provided on the second surface 16. This not only increases the noise reduction path, enabling the noise to enter the first microporous structure and the second microporous structure from different incident angles, further enhancing the noise reduction effect; but also increases the noise reduction area range.

[0033] The above-mentioned first microporous structure and second microporous structure can be the same. When the first microporous structure and the second microporous structure are the same, they are used to reduce the noise within the same frequency range. The first microporous structure and the second microporous structure can be different. When the first microporous structure and the second microporous structure are different, they are used to reduce the noise within different frequency ranges, thereby expanding the noise reduction frequency bandwidth. In this embodiment, the first microporous structure and the second microporous structure are different.

[0034] In the actual process, different microporous structures 12 can be provided at different positions of the first surface 15 and the second surface 16. A plurality of different microporous structures 12 thereon share the same meandering channel 14, increasing the noise reduction frequency range. Of course, when different microporous structures 12 are provided at different positions of the first surface 15, corresponding different meandering channels 14 can be provided to divide the accommodation cavity 11 into different meandering channels 14. The number of meandering channels 14 is not limited to the first meandering channel 141 and the second meandering channel 142 in this embodiment. Therefore, the number of corresponding meandering channels 14 can be increased according to the actual application scenario.

[0035] The cross-sectional shape of the above-mentioned housing 1 can be a regular shape, such as a pentagon or a hexagon; it can also be an irregular shape, such as an arc-shaped setting connecting other areas of the first surface 15 and the second surface 16, etc. The cross-sectional shape of the housing 1 can be selected according to different actual usage scenarios. Of course, in actual processes, the housings 1 in multiple noise reduction elements 10 can be completely the same, or some of the housings 1 in multiple noise reduction elements 10 can be the same, or some of the housings 1 in multiple noise reduction elements 10 can be different. Therefore, the housings 1 in multiple noise reduction elements 10 in the noise reduction assembly 100 are not limited to one of the above-mentioned cross-sectional shapes of the housing 1, and different cross-sectional shapes of the housing 1 can be selected according to the application scenario. For example, the cross-sectional shape of the housing 1 can be a combination of a pentagon and a hexagon, etc., or a combination of a hexagon and an irregular shape, etc., which is not limited herein.

[0036] In this embodiment, the cross-sectional shapes of the housings 1 in multiple noise reduction elements 10 in the noise reduction assembly 100 are all hexagons, and the angle between the first surface 15 and the second surface 16 of the housing 1 is 120°. Among them, the first surface 15 and the second surface 16 are arranged at an angle with the horizontal plane.

[0037] In actual processes, the housing 1 can also form a third surface (not shown in the figure). Among them, the second surface 16 and the third surface are symmetrically arranged on both sides of the first surface 15, the first surface 15 is horizontally arranged, and the angles between the second surface 16 and the first surface 15, and between the second surface 16 and the third surface are obtuse angles. A third microporous structure can also be formed on the third surface, and the third microporous structure can be the same as or different from the first microporous structure and the second microporous structure.

[0038] Furthermore, in combination with Figure 2 , the connecting plate 13 includes a first spiral plate 131 and a second spiral plate 132. The first spiral plate 131 and the second spiral plate 132 are spirally arranged in the longitudinal section. One end of the first spiral plate 131 and the second spiral plate 132 are connected to each other, so that the first spiral plate 131 and the second spiral plate 132 are spirally wound around each other to form a first meandering channel 141 and a second meandering channel 142. Through the first spiral plate 131 and the second spiral plate 132, the extension depths of the corresponding first meandering channel 141 and the second meandering channel 142 can be increased. The first meandering channel 141 communicates with the first microporous structure, and the second meandering channel 142 communicates with the second microporous structure, thereby forming two noise reduction paths, and further increasing the noise reduction efficiency.

[0039] The spiral surrounding structures of the first spiral plate 131 and the second spiral plate 132 can be arranged in the same shape as the cross-sectional shape of the housing 1 to maximize the extension depth of the first meandering channel 141 and the second meandering channel 142. When the cross-section of the housing 1 is hexagonal, the first spiral plate 131 and the second spiral plate 132 are arranged in a hexagonal spiral. Of course, the spiral surrounding manner of the first spiral plate 131 and the second spiral plate 132 can also be surrounded in other shapes, as long as it can increase the extension depth of the first meandering channel 141 and the second meandering channel 142. The first spiral plate 131 and the second spiral plate 132 can be made of metal and alloy materials.

[0040] Since the noise reduction frequency of the noise reduction element 10 is related to the extension depth of the meandering channel 14, the extension depth of the meandering channel 14 can be determined according to the noise reduction frequency requirement, so as to eliminate the required noise reduction frequency. In this embodiment, the extension depth of the first meandering channel 141 and the second meandering channel 142 is greater than or equal to 60 mm and less than or equal to 120 mm. The first meandering channel 141 and the second meandering channel 142 can be 60 mm, 80 mm, 100 mm, 110 mm, 120 mm, etc. Among them, the extension depths of the first meandering channel 141 and the second meandering channel 142 can be equal or unequal, which can be determined according to the actual situation.

[0041] In addition, the noise reduction frequency of the noise reduction element 10 is related to the pore size of the micropores 121 and the porosity of the micropores 121 in the microporous structure 12. That is, according to the noise reduction frequency requirement, the corresponding pore size of the micropores 121 and / or the porosity of the micropores 121 can be selected. In this embodiment, the microporous structure 12 includes a plurality of micropores 121, and the pore size range of the micropores 121 is greater than or equal to 0.6 mm and less than or equal to 1 mm. For example, the pore size of the micropores 121 can be 0.6 mm, 0.7 mm, 0.8 mm, 1 mm, etc. In this embodiment, the porosity range of one side of the housing 1 is greater than or equal to 2% and less than or equal to 10%, such as the porosity can be 2%, 5%, 10%, etc.

[0042] Thus, by changing any one of the extension depth of the meandering channel 14, the pore size of the micropores 121, and the porosity, the noise reduction frequency range of the noise reduction element 10 can be changed. For example, only the extension depth of the meandering channel 14 can be changed, or only the pore size of the micropores 121 can be changed, or the extension depth of the meandering channel 14 and the porosity of the micropores 121 can be changed simultaneously, or the extension depth of the meandering channel 14, the pore size of the micropores 121, and the porosity can be changed simultaneously. In this embodiment, the noise reduction frequency range of the noise reduction component 100 is greater than or equal to 150 Hz and less than or equal to 500 Hz. For example, the noise reduction frequency range of the noise reduction component 100 can be 150 Hz, 300 Hz, 400 Hz, 450 Hz, 500 Hz, etc.

[0043] For example, when the pore diameter of the micropores 121 on the first surface 15 is 0.8 mm and the porosity is 7.9%, the noise reduction frequency formed by the first microporous structure and the first meandering channel 141 is greater than or equal to 250 Hz and less than or equal to 500 Hz. The noise reduction frequency range of the above noise can be adjusted by the extension length of the first meandering channel 141. The pore diameter of the micropores 121 on the second surface 16 is 0.6 mm and the porosity is 2%, and the noise reduction frequency formed by the second microporous structure and the second meandering channel 142 is greater than or equal to 150 Hz and less than or equal to 250 Hz. The noise reduction frequency range of the above noise can be adjusted by the extension length of the second meandering channel 142.

[0044] The noise reduction component of this embodiment includes a plurality of noise reduction elements. Each noise reduction element includes a housing and a connecting plate. The housing forms a receiving cavity, and a microporous structure is provided on one side of the housing; the connecting plate is disposed in the receiving cavity, and the connecting plate makes the receiving cavity form a meandering channel, and the meandering channel communicates with the microporous structure. Through the mutual cooperation of the meandering channel and the microporous structure, noise can be reduced, and the structure of the noise reduction component is simple. Further, a plurality of noise reduction elements are arranged side by side, and the ends of the plurality of noise reduction elements with the microporous structure are arranged in the same direction, further increasing the noise reduction effect.

[0045] Please refer to Figure 3 and Figure 4 , Figure 3 is a cross-sectional view of the range hood of the present application; Figure 4 is Figure 3 the bottom view of the range hood shown.

[0046] In this embodiment, the range hood 200 includes the noise reduction component 100 of any of the above embodiments. The noise reduction component 100 is used in the range hood 200 to reduce the noise generated by the fan assembly 202 in the range hood 200, improve the performance of the range hood 200, and make the range hood 200 better meet the user's usage requirements.

[0047] Specifically, the range hood 200 includes a box body 201 and a fan assembly 202. The box body 201 forms a receiving space 2001, the fan assembly 202 is placed in the receiving space 2001, and the box body 201 is provided with a smoking port 2002 and an air outlet (not shown in the figure) communicating with the receiving space 2001. The fan assembly 202 is used to extract the oil fume from the smoking port 2002 to the air outlet.

[0048] During the operation of the fan assembly 202, the pneumatic noise generated by the fan assembly 202 will be transmitted to the human ear through the smoking port 2002, which does not meet the user's usage requirements. In this embodiment, the noise reduction assembly 100 is arranged between the fan assembly 202 and the smoking port 2002 to reduce the noise generated by the fan assembly 202, reduce the noise received by the human ear, improve the performance of the range hood 200, and meet the user's usage requirements.

[0049] In addition, since the noise generated by the fan assembly 202 is mainly low-frequency noise, by applying the noise reduction assembly 100 in the above embodiment to the range hood 200, a better noise reduction effect can be achieved for medium and low-frequency noise. Multiple noise reduction elements 10 in the noise reduction assembly 100 can be arranged at equal intervals on the smoking port 2002, or can be arranged at unequal intervals on the smoking port 2002. As Figure 4 shown, the number of noise reduction elements 10 is eleven, and they are arranged at equal intervals at the smoking port 2002.

[0050] In the actual process, during the process of the noise reduction assembly 100 reducing the noise generated by the fan assembly 202, it can also reduce the loudness of the range hood 200, further improving the performance of the range hood 200, and thus improving the satisfaction of the user's usage requirements.

[0051] Furthermore, the microporous structures 12 on the multiple noise reduction elements 10 in the noise reduction assembly 100 are all arranged facing the fan assembly 202, so that the noise generated by the fan assembly 202 can smoothly enter the winding channel 14 of the noise reduction assembly 100 for noise reduction. In this setting method, the microporous structures 12 on the noise reduction assembly 100 can also be arranged facing away from the smoking port 2002, thereby reducing the oil fume entering the noise reduction assembly 100 and avoiding the oil fume blocking the microporous structures 12, which affects the noise reduction effect of the noise reduction assembly 100.

[0052] In order to improve the noise reduction effect of the range hood 200, multiple noise reduction elements 10 can be arranged in the range hood 200. The multiple noise reduction elements 10 can be arranged close to the fan assembly 202 to absorb the noise of the fan assembly 202. Among them, multiple noise reduction elements 10 are arranged on the smoking port 2002. The noise reduction elements 10 can be arranged parallel to the long side direction of the smoking port 2002, or can be arranged parallel to the long side direction of the smoking port 2002 perpendicular to it.

[0053] In a specific embodiment, multiple noise reduction assemblies 100 can be arranged along the first direction X, where the first direction is as Figure 3 shown by the arrow X indicated. The above first direction X can be parallel to the long side direction where the smoking port 2002 is located, so that multiple noise reduction assemblies 100 can have a better sound absorption effect on noises with different incident angles.

[0054] In addition, the noise reduction component 100 is located at the smoking port 2002. To avoid the noise reduction element 10 blocking the passing rate of oil fume, in this embodiment, the ratio of the area of the orthographic projection of the noise reduction component 100 on the surface where the smoking port 2002 is located to the area of the smoking port 2002 is greater than or equal to 50% and less than or equal to 75% to ensure the passage of oil fume and avoid affecting the oil fume extraction effect of the range hood 200. The ratio of the area of the orthographic projection of the noise reduction component 100 on the surface where the smoking port 2002 is located to the area of the smoking port 2002 can be equal to 50%, 60%, 70%, 75%, etc.

[0055] Furthermore, to reduce the influence of the noise reduction component 100 on the passing rate of oil fume, multiple noise reduction elements 10 can be arranged in a relatively dense distribution in the middle of the smoking port 2002, while being arranged in a relatively sparse manner on both sides of the smoking port 2002, so that most of the oil fume enters the accommodation space 2001 from both sides of the smoking port 2002, thereby reducing the influence of the oil fume on the noise reduction component 100 and facilitating the noise reduction treatment of the noise at the same time.

[0056] In other embodiments, the noise reduction component 100 can also be arranged around the fan assembly 202 to absorb the noise generated by the fan assembly 202 from multiple directions and improve the effect of the range hood 200.

[0057] The above description is only the implementation mode of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A noise reduction component, characterized in that, The noise reduction component includes a plurality of noise reduction elements, and the noise reduction elements include: a housing, which forms a receiving cavity, one side of the housing is provided with a microporous structure, and the microporous structure includes a plurality of micropores; a connecting plate, which is disposed in the receiving cavity to make the receiving cavity form a meandering channel, and the meandering channel communicates with the microporous structure; wherein, the plurality of noise reduction elements are arranged side by side, and one end of the plurality of noise reduction elements with the microporous structure is arranged in the same direction; the housing includes a first surface and a second surface that are located on the same side and are connected at an obtuse angle, the microporous structure includes a first microporous structure and a second microporous structure, the first microporous structure is disposed on the first surface, and the second microporous structure is disposed on the second surface; the connecting plate includes a first spiral plate and a second spiral plate, one ends of the first spiral plate and the second spiral plate are connected to each other, and the first spiral plate and the second spiral plate are spirally wound around each other to form a first meandering channel and a second meandering channel, the first meandering channel communicates with the first microporous structure, and the second meandering channel communicates with the second microporous structure.

2. The noise reduction component according to claim 1, wherein The microporous structures of at least two of the plurality of noise reduction elements are different.

3. The noise reduction component according to claim 1, wherein The first microporous structure and the second microporous structure are different.

4. The noise reduction component according to claim 1, characterized in that, The extension depth of the first meandering channel and the second meandering channel is greater than or equal to 60 mm and less than or equal to 120 mm.

5. The noise reduction component according to claim 1, characterized in that, The aperture range of the micropores is greater than or equal to 0.6 mm and less than or equal to 1 mm; The porosity range of one side of the housing is greater than or equal to 2% and less than or equal to 10%; The noise reduction frequency range of the noise reduction component is greater than or equal to 150 Hz and less than or equal to 500 Hz.

6. An oil fume extractor, characterized in that, The range hood includes: a box body, which forms a receiving space, and the box body is provided with a smoking port; a fan assembly, which is located in the receiving space; the noise reduction component according to any one of claims 1-5, which is disposed between the fan assembly and the smoking port for reducing the noise generated by the fan assembly.

7. The range hood according to claim 6, wherein, A plurality of the microporous structures in the noise reduction component are arranged towards the fan assembly.

8. The range hood according to claim 6, wherein, The noise reduction components are arranged side by side in a first direction, wherein the first direction is parallel to the plane where the smoking port is located.

9. The range hood according to claim 6, wherein, The ratio of the area of the orthographic projection of the noise reduction component on the surface where the smoking port is located to the area of the smoking port is greater than or equal to 50% and less than or equal to 75%.

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