A range hood with a supersurface noise reduction device

Abstract

This invention proposes a range hood with a metasurface noise reduction device, comprising a range hood body, a first maintenance plate, and a second maintenance plate. The first maintenance plate and the second maintenance plate are disposed on the range hood body, and a metasurface noise reduction device is provided between the first maintenance plate and the second maintenance plate. The metasurface noise reduction device includes one or more metasurface structures, each metasurface structure including a longitudinally arranged perforated plate and a baffle disposed between adjacent perforated plates. Noise generated by the range hood is introduced into the metasurface structure, and the noise of the range hood is reduced by utilizing the modulation of the sound wave vibration surface by the acoustic metasurface.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and more specifically to a range hood with a supersurface noise reduction device. Background Technology

[0002] As living standards improve, people demand high-volume, high-suction range hoods. However, these high-volume, high-suction range hoods are also generating increasing noise. When cooking, turning on the range hood makes it impossible to hear conversations, phone calls, doorbells, or children's voices. This loud noise can even cause irritability, headaches, and palpitations for housewives and kitchen workers. Long-term use can seriously impact physical and mental health. Therefore, noise reduction has become a pressing technical problem that needs to be solved with existing range hoods. Summary of the Invention

[0003] The present invention aims to solve one of the problems existing in the existing related technologies to a certain extent. To this end, the purpose of the present invention is to propose a range hood with a supersurface silencing device to effectively reduce the noise generated by the range hood.

[0004] The above objective is achieved through the following technical solution:

[0005] A range hood with a metasurface silencing device includes a range hood body, a first maintenance plate, and a second maintenance plate. The first maintenance plate and the second maintenance plate are disposed on the range hood body. A metasurface silencing device is provided between the first maintenance plate and the second maintenance plate. The metasurface silencing device includes one or more metasurface structures. The metasurface structure includes a longitudinally arranged perforated plate and a baffle disposed between adjacent perforated plates.

[0006] As a further improvement of the present invention, the metasurface structure includes a horizontally arranged upper plate and a lower plate, and a vertically arranged perforated plate is provided between the upper plate and the lower plate.

[0007] As a further improvement of the present invention, the baffle includes a first baffle and a second baffle, forming a partition between two adjacent perforated plates, and the first baffle and the second baffle extending into the partition are respectively provided on the sidewalls of the two adjacent perforated plates.

[0008] As a further improvement of the present invention, the first baffle and the second baffle are arranged alternately and at intervals.

[0009] As a further improvement of the present invention, the projections of the first baffle and the second baffle in the vertical direction may partially overlap, completely overlap, or not overlap at all.

[0010] As a further improvement of the present invention, the first baffle and the second baffle partially overlap in the vertical direction by a length that is one-quarter, one-half, or three-quarters of the length of the baffle.

[0011] As a further improvement of the present invention, six perforated plates are longitudinally arranged between the upper plate and the lower plate, and the six perforated plates divide the metasurface structure into five partitions, namely the first partition, the second partition, the third partition, the fourth partition and the fifth partition.

[0012] As a further improvement of the present invention, in the first partition layer, the vertical projection overlap length of the first baffle and the second baffle is half the length of the baffle; in the second partition layer, the vertical projection overlap length of the first baffle and the second baffle is one-quarter the length of the baffle; in the third partition layer, the vertical projection overlap length of the first baffle and the second baffle is three-quarters the length of the baffle; in the fourth partition layer, the vertical projections of the first baffle and the second baffle do not overlap; and in the fifth partition layer, the vertical projections of the first baffle and the second baffle completely overlap.

[0013] As a further improvement of the present invention, the first partition, the second partition, the third partition, the fourth partition and the fifth partition are arranged sequentially from left to right.

[0014] As a further improvement of the present invention, the holes on the perforated plate are circular, square, or triangular.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] 1. This invention proposes a range hood with a metasurface noise reduction device. The noise generated by the range hood is introduced into the metasurface structure. By utilizing the acoustic metasurface to regulate the vibration surface of the acoustic waves, the noise of the range hood is reduced. Attached Figure Description

[0017] Figure 1 This is an exploded view of a range hood with a metasurface silencing device in one embodiment;

[0018] Figure 2 This is another exploded view of a range hood with a metasurface silencing device in the embodiment;

[0019] Figure 3 This is a structural diagram of the metasurface structure in Example 1;

[0020] Figure 4 This is another structural diagram of the metasurface structure in Example 1;

[0021] Figure 5 This is a schematic diagram showing the vertical projections of the first and second baffles of the metasurface structure in Example 1 completely overlapping.

[0022] Figure 6 This is a schematic diagram showing that the vertical projections of the first and second baffles of the metasurface structure in Embodiment 1 do not overlap.

[0023] Figure 7 This is a schematic diagram showing that the vertical projections of the first and second baffles of the metasurface structure in Embodiment 1 partially overlap.

[0024] Figure 8 This is a structural diagram of the metasurface structure in Example 2;

[0025] Figure 9 This is another structural diagram of the metasurface structure in Example 2;

[0026] Figure 10 This is a structural diagram of the metasurface silencing device in Example 2. Detailed Implementation

[0027] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0028] Example 1:

[0029] See appendix Figure 1-7 This invention discloses a range hood with a metasurface noise reduction device, comprising a range hood body 1, a first maintenance plate 31, and a second maintenance plate 32. The first maintenance plate 31 and the second maintenance plate 32 are disposed on the range hood body 1. A metasurface noise reduction device 4 is provided between the first maintenance plate 31 and the second maintenance plate 32. The metasurface noise reduction device 4 includes one or more metasurface structures 41. Each metasurface structure 41 includes a longitudinally arranged perforated plate 413 and a baffle 410 disposed between adjacent perforated plates 413. This invention proposes a range hood with a metasurface noise reduction device, in which the noise generated by the range hood is introduced into the metasurface structure 41, and the noise of the range hood is reduced by utilizing the modulation of the sound wave vibration surface by the sound wave metasurface.

[0030] According to Huygens' principle, the wavefront at the next moment is the envelope surface generated when each point on the current wavefront acts as a wave source. Therefore, by using the metasurface structure 41 to change the phase gradient of the acoustic waves at the interface, the wavefront of the scattered sound field can be modulated.

[0031] like Figure 3In this embodiment, the metasurface structure 41 includes a horizontally arranged upper plate 411 and a lower plate 412, with a vertically arranged perforated plate 413 between the upper plate 411 and the lower plate 412. Several rows of acoustic hole groups 414 are provided on the perforated plate 413, each row including 3-8 acoustic holes 4141. The acoustic holes 4141 in each row are spaced apart, and the acoustic holes 4141 can be circular, square, or triangular. Noise waves are transmitted into the metasurface structure 41 through the acoustic holes 4141 and propagate within the metasurface structure 41 through the acoustic holes 4141.

[0032] The baffle 410 includes a first baffle 415 and a second baffle 416, forming a partition 417 between two adjacent perforated plates 413, and the first baffle 415 and the second baffle 416 extending into the partition 417 are respectively provided on the sidewalls of the two adjacent perforated plates 413. For example, Figure 3 The two adjacent perforated plates 413 are respectively a first perforated plate 4131 and a second perforated plate 4132 arranged opposite to each other. The first perforated plate 4131 has a plurality of first baffles 415 extending into the partition layer 417 or into the second perforated plate 4132 on its side wall. The second perforated plate 4132 has a plurality of second baffles 416 extending into the partition layer 417 or into the first perforated plate 4131. The connection between the first baffles 415 and the perforated plate 413 is between two adjacent rows of acoustic hole groups 414, and the connection between the second baffles 416 and the perforated plate 413 is between two adjacent rows of acoustic hole groups 414.

[0033] like Figure 4 The first baffle 415 and the second baffle 416 are arranged alternately, one above the other. The noise sound waves generated by the range hood enter the interior of the metasurface structure 41 through the perforated plate 413. Some sound waves enter the interior of the metasurface structure 41 from the leftmost perforated plate 413 and propagate from left to right, while some sound waves enter the interior of the metasurface structure 41 from the rightmost perforated plate 413 and propagate from right to left. The baffles arranged alternately allow the sound waves propagating from left to right and from right to left to have different phase differences when they meet in the metasurface structure 41, thereby reducing the vibration intensity of the sound.

[0034] The projections of the first baffle 415 and the second baffle 416 in the vertical direction partially overlap (e.g., Figure 4 Or 7), or all overlapping (e.g. Figure 5 ), or non-overlapping (e.g. Figure 6 ).

[0035] like Figure 7When the projections of the first baffle 415 and the second baffle 416 in the vertical direction partially overlap, the length of the partial overlap in the vertical direction is one-quarter, one-half, or three-quarters of the length of the baffle 410. Figure 7 The area enclosed by the dashed line is where the first baffle 415 and the second baffle 416 partially overlap in the vertical direction.

[0036] The first baffle 415 and the second baffle 416 have the same length. In other embodiments, the length of the first baffle 415 may be greater than or less than the length of the second baffle 416.

[0037] like Figure 3 In this embodiment, the metasurface structure 41 includes an upper plate 411, a lower plate 412, and a first perforated plate 4131 and a second perforated plate 4132 disposed between the upper plate 411 and the lower plate 412. A plurality of first baffles 415 extending upward from the first perforated plate 4131 toward the second perforated plate 4132 are provided on the sidewall of the first perforated plate 4131. A plurality of second baffles 416 extending from the second perforated plate 4132 toward the first perforated plate 4131 are provided on the sidewall of the second perforated plate 4132. A partition layer 417 is formed between the first perforated plate 4131 and the second perforated plate 4132, with the first baffles 415 and the second baffles 416 alternating within the partition layer 417. The projections of the first baffles 415 and the second baffles 416 in the vertical direction may partially overlap, completely overlap, or not overlap at all. When the projections of the first baffle 415 and the second baffle 416 in the vertical direction partially overlap, the overlap length is one-quarter, one-half, or three-quarters of the length of the first baffle 415 or the second baffle 416. The first baffle 415 and the second baffle 416 have the same length. Sound waves enter the metasurface structure 41 through the first perforated plate 4131 or the second perforated plate 4132, and propagate from the first perforated plate 4131 to the second perforated plate 4132, or from the second perforated plate 4132 to the first perforated plate 4131. The alternating arrangement of the first baffle 415 and the second baffle 416 causes different phase differences when the sound waves meet within the metasurface structure 41, thereby reducing the vibration intensity of the sound and reducing the noise of the range hood.

[0038] Example 2:

[0039] like Figure 8The difference between this embodiment and Embodiment 1 is that, in the metasurface structure 41, six perforated plates 413 are longitudinally arranged between the upper plate 411 and the lower plate 412. The perforated plates 413 are arranged sequentially from left to right, and the six perforated plates 413 divide the metasurface structure 41 into five partitions 417, namely the first partition 4171, the second partition 4172, the third partition 4173, the fourth partition 4174, and the fifth partition 4175.

[0040] like Figure 9 In the first partition 4171, the vertical projection overlap length of the first baffle 415 and the second baffle 416 is half the length of the baffle; in the second partition 4172, the vertical projection overlap length of the first baffle 415 and the second baffle 416 is one-quarter the length of the baffle; in the third partition 4173, the vertical projection overlap length of the first baffle 415 and the second baffle 416 is three-quarters the length of the baffle; in the fourth partition 4174, the vertical projections of the first baffle 415 and the second baffle 416 do not overlap; and in the fifth partition 4175, the vertical projections of the first baffle 415 and the second baffle 416 completely overlap.

[0041] The metasurface silencing device 4 may include a number of metasurface structures 41 as described in this embodiment. For example... Figure 10 The metasurface silencing device 4 includes 6 metasurface structures 41 in this embodiment.

[0042] The first partition 4171, the second partition 4172, the third partition 4173, the fourth partition 4174, and the fifth partition 4175 are arranged sequentially from left to right. Alternatively, the fifth partition 4175, the fourth partition 4174, the third partition 4173, the second partition 4172, and the first partition 4171 can be arranged sequentially from left to right. The left-to-right arrangement order of the first partition 4171, the second partition 4172, the third partition 4173, the fourth partition 4174, and the fifth partition 4175 is not restricted. Here, the numbers in the first partition 4171, the second partition 4172, the third partition 4173, the fourth partition 4174, and the fifth partition 4175 are for distinguishing between different partitions 417, and are not related to the order. In other embodiments, the third partition 4173, the fifth partition 4175, the first partition 4171, the fourth partition 4174, and the second partition 4172 may be arranged sequentially from left to right.

[0043] Sound waves enter the metasurface structure 41 through the leftmost perforated plate 413 or the rightmost plate, propagating from left to right or from right to left. The sound waves pass through five partitions 417, and the alternating baffles within each partition 417 create a phase difference between the sound waves propagating from left to right and from right to left when they meet within the metasurface structure 41, thereby reducing the vibration intensity of the sound and lowering the noise of the range hood.

[0044] Example 3:

[0045] The difference between this embodiment and Embodiment 2 is that seven perforated plates are longitudinally arranged between the upper plate and the lower plate. The perforated plates are arranged sequentially from left to right, and the seven perforated plates divide the metasurface structure into six partitions, including a sixth partition in addition to the five partitions in Embodiment 2. Specifically, these are the first partition, the second partition, the third partition, the fourth partition, the fifth partition, and the sixth partition.

[0046] In the first partition, the vertical projection overlap length of the first baffle and the second baffle is half the length of the baffle; in the second partition, the vertical projection overlap length of the first baffle and the second baffle is one-quarter the length of the baffle; in the third partition, the vertical projection overlap length of the first baffle and the second baffle is three-quarters the length of the baffle; in the fourth partition, the vertical projections of the first baffle and the second baffle completely overlap; in the fifth partition, the vertical projections of the first baffle and the second baffle do not overlap.

[0047] In the sixth partition, the projections of the first baffle and the second baffle in the vertical direction may partially overlap, completely overlap, or not overlap at all. If the projections of the first baffle and the second baffle in the vertical direction partially overlap in the sixth partition, the length of the partial overlap in the vertical direction is one-quarter, one-half, or three-quarters of the length of the first baffle or the second baffle.

[0048] The sixth partition can be set at the far left or far right of the five partitions in Embodiment 2. For example, the six partitions of the metasurface structure are arranged from left to right as the first partition, the second partition, the third partition, the fourth partition, the fifth partition, and the sixth partition.

[0049] The sixth partition can be set between the five partitions in Embodiment 2. For example, the six partitions of the metasurface structure are arranged from left to right as the first partition, the second partition, the sixth partition, the third partition, the fourth partition, and the fifth partition.

[0050] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. A range hood with a supersurface noise reduction device, characterized in that, The system includes a range hood body (1), a first maintenance plate (31), and a second maintenance plate (32). The first maintenance plate (31) and the second maintenance plate (32) are disposed on the range hood body (1). A metasurface silencing device (4) is provided between the first maintenance plate (31) and the second maintenance plate (32). The metasurface silencing device (4) includes multiple metasurface structures (41). Each metasurface structure (41) includes a longitudinally arranged perforated plate (413) and a baffle (410) disposed between adjacent perforated plates (413). Several rows of sound hole groups (414) are provided on the perforated plate (413). Each row of sound hole groups (414) includes a sound hole (4141). The sound holes (4141) of each row of sound hole groups (414) are spaced apart. Noise waves are transmitted into the metasurface structure (41) through the sound holes (4141) and propagate in the metasurface structure (41) through the sound holes (4141).

2. A range hood with a supersurface noise reduction device according to claim 1, characterized in that, The metasurface structure (41) further includes a horizontally arranged upper plate (411) and a lower plate (412), and the perforated plate (413) is longitudinally arranged between the upper plate (411) and the lower plate (412).

3. A range hood with a supersurface noise reduction device according to claim 2, characterized in that, The baffle (410) includes a first baffle (415) and a second baffle (416), forming a partition (417) between two adjacent perforated plates (413), and the first baffle (415) and the second baffle (416) extending into the partition (417) are respectively provided on the sidewalls of the two adjacent perforated plates (413).

4. A range hood with a supersurface noise reduction device according to claim 3, characterized in that, The first baffle (415) and the second baffle (416) are arranged alternately and at intervals.

5. A range hood with a supersurface noise reduction device according to claim 4, characterized in that, The projections of the first baffle (415) and the second baffle (416) in the vertical direction may partially overlap, completely overlap, or not overlap at all.

6. A range hood with a supersurface noise reduction device according to claim 5, characterized in that, The first baffle (415) and the second baffle (416) partially overlap in the vertical direction by a length that is one-quarter, one-half, or three-quarters of the length of the baffle (410).

7. A range hood with a supersurface noise reduction device according to claim 6, characterized in that, Six perforated plates (413) are longitudinally arranged between the upper plate (411) and the lower plate (412). The six perforated plates (413) divide the metasurface structure (41) into five partitions (417), namely the first partition (4171), the second partition (4172), the third partition (4173), the fourth partition (4174), and the fifth partition (4175).

8. A range hood with a supersurface noise reduction device according to claim 7, characterized in that, In the first partition (4171), the vertical projection overlap length of the first baffle (415) and the second baffle (416) is half the length of the baffle (410); in the second partition (4172), the vertical projection overlap length of the first baffle (415) and the second baffle (416) is one-quarter the length of the baffle (410); in the third partition (4173), the vertical projection overlap length of the first baffle (415) and the second baffle (416) is three-quarters the length of the baffle (410); in the fourth partition (4174), the vertical projections of the first baffle (415) and the second baffle (416) completely overlap; in the fifth partition (4175), the vertical projections of the first baffle (415) and the second baffle (416) do not overlap.

9. A range hood with a supersurface noise reduction device according to claim 8, characterized in that, The first partition (4171), the second partition (4172), the third partition (4173), the fourth partition (4174), and the fifth partition (4175) are arranged sequentially from left to right.

10. A range hood with a supersurface noise reduction device according to claim 2, characterized in that, The holes on the perforated plate (413) are circular, square, or triangular.

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