A noise reduction device and a range hood

Abstract

This utility model relates to the field of household appliance technology, and discloses a noise reduction device and a range hood. The noise reduction device includes a noise reduction housing and silencing chambers. The noise reduction housing is disposed between the main housing and the smoke collection mechanism of the range hood, and both ends of the noise reduction housing are connected to the main housing and the smoke collection mechanism, respectively. At least two silencing chambers are arranged in an array and are both disposed within the noise reduction housing. Each silencing chamber includes a middle noise reduction chamber and two end noise reduction chambers. The two end noise reduction chambers are respectively connected to the two ends of the middle noise reduction chamber along the direction of smoke flow. The volume of the end noise reduction chambers is smaller than the volume of the middle noise reduction chamber. Noise reduction holes are provided on the cavity wall of the middle noise reduction chamber. By setting the volume of the end noise reduction chambers to be smaller than the volume of the middle noise reduction chamber, the inlet end of the silencing chamber exhibits an expanding trend. During the process of noise entering the middle noise reduction chamber from the end noise reduction chambers, reflection and interference phenomena can occur, thereby reducing the sound energy radiated from the noise reduction chamber to the outside.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a noise reduction device and a range hood. Background Technology

[0002] A range hood is a kitchen appliance designed to purify the kitchen environment. Installed above the stove, it quickly removes combustion waste and harmful fumes produced during cooking, thus purifying the air. However, the airflow entering the range hood creates a vortex, and the high-speed rotation of the fan impeller and the operation of the motor contribute to significant noise levels during use. Traditional range hoods often employ sound-absorbing cotton within the main enclosure for noise reduction. However, this method, due to the dispersed placement of the sound-absorbing material, fails to concentrate and absorb sound energy, resulting in poor overall noise reduction.

[0003] Therefore, there is an urgent need to develop a noise reduction device and a range hood to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a noise reduction device and a range hood that can effectively improve noise reduction and enhance the user experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A noise reduction device for a range hood, the noise reduction device comprising:

[0007] A noise reduction enclosure is disposed between the main box and the smoke collection mechanism of the range hood, and both ends of the noise reduction enclosure are respectively connected to the main box and the smoke collection mechanism;

[0008] The silencing cavity includes at least two silencing cavities arranged in an array and both disposed within the noise reduction housing. Each silencing cavity includes a middle noise reduction cavity and an end noise reduction cavity. The two end noise reduction cavities are respectively connected to the two ends of the middle noise reduction cavity along the direction of oil fume flow. The volume of the end noise reduction cavity is smaller than the volume of the middle noise reduction cavity. Noise reduction holes are provided on the cavity wall of the middle noise reduction cavity.

[0009] As a preferred embodiment of the noise reduction device provided by this utility model, a first sound-absorbing layer is provided on the inner wall of the noise reduction box;

[0010] And / or, a second sound-absorbing layer is provided between two adjacent intermediate noise-reducing cavities.

[0011] As a preferred embodiment of the noise reduction device provided by this utility model, the first sound-absorbing layer is sound-absorbing cotton; and / or the second sound-absorbing layer is sound-absorbing cotton.

[0012] As a preferred embodiment of the noise reduction device provided by this utility model, each of the intermediate noise reduction cavities has multiple noise reduction holes, and the multiple noise reduction holes are arranged at intervals along the axial and / or circumferential directions of the intermediate noise reduction cavity.

[0013] As a preferred embodiment of the noise reduction device provided by this utility model, the cross-sectional shape of the intermediate noise reduction cavity is polygonal.

[0014] As a preferred embodiment of the noise reduction device provided by this utility model, the noise reduction device further includes a sound insulation component disposed in the noise reduction box, and the sound insulation component covers the end noise reduction cavity of the plurality of sound-absorbing cavities.

[0015] As a preferred embodiment of the noise reduction device provided by this utility model, there are two sound insulation components, which are located on both sides of the middle noise reduction cavity. Each sound insulation component is provided with a through hole that corresponds one-to-one with the end noise reduction cavity on the corresponding side, and the end noise reduction cavity passes through the corresponding through hole.

[0016] This utility model also provides a range hood, including:

[0017] main box;

[0018] The fan mechanism is installed in the main housing;

[0019] The smoke collection mechanism and the noise reduction device as described above are provided. The smoke collection mechanism is located below the main box and is connected to the main box through the noise reduction box of the noise reduction device.

[0020] As a preferred embodiment of the range hood provided by this utility model, the main housing is installed inside the ceiling.

[0021] As a preferred embodiment of the range hood provided by this utility model, a telescopic tube is connected between the main box and the noise reduction box.

[0022] The beneficial effects of this utility model are as follows:

[0023] This invention provides a noise reduction device for range hoods. By filling the noise reduction chamber with multiple silencing cavities, noise energy can be concentrated and absorbed, thereby improving the noise reduction effect. By setting the volume of the end noise reduction cavities to be smaller than that of the middle noise reduction cavity, the inlet end of the silencing cavity exhibits an expanding trend. As noise enters the middle noise reduction cavity from the end cavities, reflection and interference phenomena occur, reducing the sound energy radiated outside the noise reduction cavity. Furthermore, by setting noise reduction holes on the cavity wall of the middle noise reduction cavity, noise entering the middle cavity is reflected within the middle cavity after entering the noise reduction holes, resulting in energy loss and significantly reducing noise intensity. This noise reduction device has a simple structure, excellent noise reduction effect, and improves the user experience.

[0024] The range hood provided by this utility model can significantly reduce noise intensity and improve the user experience by applying the above-mentioned noise reduction device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the range hood provided in this embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the hidden noise reduction housing of the range hood provided in this embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the silencing cavity provided in this embodiment of the utility model;

[0029] Figure 4 This is a structural schematic diagram of the sound insulation component provided in this embodiment of the utility model.

[0030] Figure label:

[0031] 100. Noise reduction device;

[0032] 10. Noise-reducing enclosure;

[0033] 20. Noise-absorbing cavity; 21. Intermediate noise-reducing cavity; 210. Noise-reducing hole; 22. End noise-reducing cavity;

[0034] 30. Sound insulation components; 301. Through holes;

[0035] 200, Main housing; 300, Smoke collection mechanism; 400, Fan mechanism; 500, Telescopic pipe. Detailed Implementation

[0036] Before explaining any embodiment of the present invention in detail, it should be understood that the present invention is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0037] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0038] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0039] In this invention, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0040] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0041] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0042] In this utility model, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when one element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent the direct orientation but can also be understood as the lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0043] Figure 1 A schematic diagram of the structure of the range hood provided in this embodiment is shown. Figure 1 As shown, this embodiment provides a range hood, which includes a main housing 200, a fan mechanism 400, and a smoke collection mechanism 300. The fan mechanism 400 is installed in the main housing 200, and the bottom of the main housing 200 has an opening. The smoke collection mechanism 300 is located below the main housing 200 and connected to the bottom of the main housing 200, so as to communicate with the fan mechanism 400 through the bottom opening of the main housing 200. When the range hood is needed to extract cooking fumes, the fan mechanism 400 is activated, and the smoke collection mechanism 300 extracts the cooking fumes generated during the cooking process, preventing the fumes from escaping.

[0044] It should be noted that the fan mechanism 400 and the smoke collection mechanism 300 are both relatively mature technologies in the prior art. The specific structure and working principle of the fan mechanism 400 and the smoke collection mechanism 300 will not be described in detail in this embodiment.

[0045] Figure 2 A schematic diagram of the hidden noise reduction housing 10 of the range hood provided in this embodiment is shown. Figure 3 A schematic diagram of the structure of the silencing cavity 20 provided in this embodiment is shown. Figures 2-3 and combined Figure 1 As shown, in order to reduce the noise generated by the range hood during operation, this embodiment also provides a noise reduction device 100. The noise reduction device 100 includes a noise reduction box 10 and a silencing cavity 20. The noise reduction box 10 is disposed between the main box 200 and the smoke collection mechanism 300, and both ends of the noise reduction box 10 are respectively connected to the main box 200 and the smoke collection mechanism 300. At least two silencing cavities 20 are arranged in an array and are both disposed in the noise reduction box 10. Each silencing cavity 20 includes a middle noise reduction cavity 21 and an end noise reduction cavity 22. The two end noise reduction cavities 22 are respectively connected to the two ends of the middle noise reduction cavity 21 along the direction of oil fume flow. The volume of the end noise reduction cavity 22 is smaller than the volume of the middle noise reduction cavity 21. Noise reduction holes 210 are provided on the cavity wall of the middle noise reduction cavity 21.

[0046] The noise reduction device 100 provided in this embodiment improves its noise reduction effect by filling multiple silencing cavities 20 into the noise reduction housing 10, which concentrates and absorbs noise energy. By setting the volume of the end noise reduction cavity 22 to be smaller than that of the middle noise reduction cavity 21, the inlet end of the silencing cavity 20 exhibits an expanding trend. During the process of noise entering the middle noise reduction cavity 21 from the end noise reduction cavity 22, reflection and interference phenomena occur, thereby reducing the sound energy radiated outward from the noise reduction cavity. Furthermore, by providing noise reduction holes 210 on the cavity wall of the middle noise reduction cavity 21, noise entering the middle noise reduction cavity 21 can be reflected within the middle noise reduction cavity 21 after entering the noise reduction holes 210, resulting in energy loss and significantly reducing noise intensity. This noise reduction device 100 has a simple structure, excellent noise reduction effect, and improves the user experience.

[0047] like Figure 3 As shown, each of the intermediate noise reduction cavities 21 has multiple noise reduction holes 210, which are arranged at intervals along the axial and / or circumferential directions of the intermediate noise reduction cavity 21. This design allows noise entering the intermediate noise reduction cavity 21 to undergo multiple reflections, with each reflection resulting in the loss of some energy, thereby further reducing the noise intensity and improving the noise reduction effect.

[0048] In this embodiment, the cross-sectional shape of the intermediate noise reduction cavity 21 is rectangular. When filling the noise reduction box 10 with the silencing cavity 20, the gap between two adjacent silencing cavities 20 can be reduced, thereby increasing the filling rate in the noise reduction box 10. At the same time, the internal space of the noise reduction box 10 can be fully utilized to arrange as many silencing cavities 20 as possible, thereby ensuring that it has sufficient air intake area and reducing fluid resistance.

[0049] Of course, in other embodiments, the cross-sectional shape of the intermediate noise reduction cavity 21 can also be a polygon such as a triangle or hexagon. It can be spliced ​​to form a shape with the same cross-sectional shape as the noise reduction box 10, so as to fill as much of the internal space of the noise reduction box 10 as possible. It is understood that the cross-sectional shapes of the intermediate noise reduction cavities 21 of multiple noise reduction cavities 20 can be the same, or partially the same and partially different.

[0050] like Figure 1 and Figure 2 As shown, a first sound-absorbing layer is provided on the inner wall of the noise-reducing enclosure 10; a second sound-absorbing layer is provided between two adjacent intermediate noise-reducing cavities 21. When noise propagates from the noise-reducing hole 210 of the intermediate noise-reducing cavity 21 to the space between two adjacent intermediate noise-reducing cavities 21 or between the intermediate noise-reducing cavity 21 and the noise-reducing enclosure 10, the first sound-absorbing layer and / or the second sound-absorbing layer can absorb some of the noise energy, thereby further reducing the sound energy radiated to the outside of the noise-reducing cavity and improving the noise reduction effect of the noise reduction device 100.

[0051] In this embodiment, the first sound-absorbing layer is sound-absorbing cotton; and / or the second sound-absorbing layer is sound-absorbing cotton. The sound-absorbing cotton has numerous interconnected micropores inside, which can convert sound energy into heat energy and dissipate it. Furthermore, the sound-absorbing cotton is lightweight and can be cut, bent, or molded into any shape, enabling complete coverage of the gaps between two adjacent intermediate noise-reducing cavities 21 and between the intermediate noise-reducing cavity 21 and the noise-reducing housing 10. Of course, in other embodiments, the first and second sound-absorbing layers can also be made of other materials with sound-absorbing functions; this embodiment does not limit this.

[0052] Figure 4 A structural schematic diagram of the sound insulation component 30 provided in this embodiment is shown. Figure 4 and combined Figure 2 , Figure 3As shown, the noise reduction device 100 also includes a sound insulation component 30 disposed in the noise reduction housing 10, which covers the end noise reduction cavities 22 of the plurality of sound-absorbing cavities 20. Specifically, there are two sound insulation components 30, which are located at opposite ends of the intermediate noise reduction cavity 21. Each sound insulation component 30 is provided with a through hole 301 corresponding to the end noise reduction cavity 22 on the corresponding side. The end noise reduction cavity 22 passes through the corresponding through hole 301, thereby achieving complete coverage of the end noise reduction cavity 22 by the sound insulation component 30. Since the volume of the end noise reduction cavity 22 is small, the energy of the noise entering the end noise reduction cavity 22 is relatively large. By covering the end noise reduction cavity 22 with the sound insulation component 30, the energy of the noise entering the end noise reduction cavity 22 can be absorbed.

[0053] In this embodiment, the sound insulation component 30 includes a sound-absorbing layer and a sound-insulating layer attached to the outside of the sound-absorbing layer. The sound-absorbing layer is made of a porous material, and the sound-insulating layer is made of a sound-insulating material to improve the sound insulation effect of the sound insulation component 30. For example, the sound-absorbing layer can be made of sound-absorbing cotton, foam plastic, etc.

[0054] like Figure 3 As shown, the silencing cavity 20 is a one-piece molded structure, which can eliminate the link between the intermediate noise reduction cavity 21 and the end noise reduction cavity 22, improve processing efficiency, and avoid the phenomenon of excessive noise from the range hood due to noise passing through the gap between the intermediate noise reduction cavity 21 and the end noise reduction cavity 22.

[0055] Continue as Figure 1 As shown, in this embodiment, the main housing 200 is installed inside the ceiling. This arrangement allows the fan mechanism 400 to be positioned further away from the user's ears, thereby reducing the operating noise of the range hood and improving the user experience by increasing the distance between the user and the noise source.

[0056] Optionally, a telescopic tube 500 connects the main casing 200 and the noise reduction casing 10. By using the telescopic tube 500, the operator can adjust the distance between the main casing 200 and the smoke collection mechanism 300 according to the actual installation height of the user's kitchen, so as to achieve the optimal smoke extraction distance between the smoke collection mechanism 300 and the stove, thereby improving the smoke extraction effect. In this embodiment, the telescopic tube 500 is a corrugated pipe.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A noise reduction device for a range hood, comprising: The noise reduction device includes: A noise reduction housing (10) is disposed between the main housing (200) and the smoke collection mechanism (300) of the range hood, and the two ends of the noise reduction housing (10) are respectively connected to the main housing (200) and the smoke collection mechanism (300); At least two silencing cavities (20) are arranged in an array and are both disposed in the noise reduction box (10). Each silencing cavity (20) includes an intermediate noise reduction cavity (21) and an end noise reduction cavity (22). The two end noise reduction cavities (22) are respectively connected to the two ends of the intermediate noise reduction cavity (21) along the direction of oil fume flow. The volume of the end noise reduction cavity (22) is smaller than the volume of the intermediate noise reduction cavity (21). Noise reduction holes (210) are provided on the cavity wall of the intermediate noise reduction cavity (21).

2. The noise reducing device of claim 1, wherein, The inner wall of the noise reduction enclosure (10) is provided with a first sound-absorbing layer; And / or, a second noise-absorbing layer is provided between two adjacent intermediate noise-reducing cavities (21).

3. The noise reducing device of claim 2, wherein, The first sound-absorbing layer is sound-absorbing cotton; and / or the second sound-absorbing layer is sound-absorbing cotton.

4. The noise reducing device of claim 1, wherein, The number of noise reduction holes (210) on each of the intermediate noise reduction cavities (21) is multiple, and the multiple noise reduction holes (210) are arranged at intervals along the axial and / or circumferential direction of the intermediate noise reduction cavity (21).

5. The noise reducing device of claim 1, wherein, The cross-sectional shape of the intermediate noise reduction cavity (21) is polygonal.

6. The noise reducing device of claim 1, wherein, The noise reduction device also includes a sound insulation component (30) disposed in the noise reduction box (10), the sound insulation component (30) covering the end noise reduction cavity (22) of the plurality of sound-absorbing cavities (20).

7. The noise reducing device of claim 6, wherein, There are two sound insulation components (30), which are located on both sides of the intermediate noise reduction cavity (21). Each sound insulation component (30) is provided with a through hole (301) corresponding to the end noise reduction cavity (22) on the corresponding side. The end noise reduction cavity (22) passes through the corresponding through hole (301).

8. A range hood characterized by, include: mainbox(200); The fan mechanism (400) is installed in the main housing (200); The smoke collection mechanism (300) and the noise reduction device as described in any one of claims 1 to 7, wherein the smoke collection mechanism (300) is located below the main box (200) and is connected to the main box (200) through the noise reduction box (10) of the noise reduction device.

9. The hood according to claim 8, characterized in that, The main box (200) is installed inside the ceiling.

10. The hood according to claim 8, characterized in that, A telescopic tube (500) connects the main box (200) and the noise reduction box (10).

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