Multi-frequency noise filtering range hood with through holes distributed according to arrangement region
A technology of noise filtering and regional distribution, applied in the field of range hoods, can solve the problems such as the inability to reduce the noise reduction effect of range hoods and the inability to reduce noise in multiple frequency bands. high effect
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Embodiment 1
[0042] A multi-frequency noise filter range hood with through holes distributed according to the arrangement area, such as Figure 1-3 As shown, a hood main body 2 and a noise filtering device 1 capable of reducing multi-frequency noise are provided, and the noise filtering device 1 is assembled on the hood main body 2 . The noise filtering device 1 is arranged as a panel 11 distributing through holes 111 for canceling multi-frequency noise. The through holes 111 are distributed in the noise filtering device 1 according to the arrangement area 13 .
[0043] The arrangement area 13 of the present invention is a triangular arrangement, a square arrangement, a rhombus arrangement or a polygonal arrangement other than the above three arrangements. Specifically, the arrangement area 13 in this embodiment is arranged in a triangle.
[0044] The triangular arrangement of this embodiment, such as image 3 shown in . It should be noted that the triangular arrangement in the presen...
Embodiment 2
[0060] A multi-frequency noise filter range hood with through holes distributed according to the arrangement area, such as Figure 5 As shown, other features are the same as in Embodiment 1, the difference is that the arrangement area 13 of this embodiment is arranged in a square, such as Figure 5 shown in .
[0061] It should be noted that the square arrangement in the present invention is not limited to Figure 5 middle, Figure 4 Middle A and Figure 4 As shown in middle B, other arrangement regions 13 arranged in any square shape also meet the requirements of the square arrangement in the present invention, and are also within the protection scope of the present invention.
[0062] Both d and b of this embodiment have a plurality of values. This embodiment is a range hood for multi-frequency noise reduction.
[0063] It has been verified by experiments that the arrangement area 13 of this embodiment is arranged in a square, so that the noise reduction effect is bette...
Embodiment 3
[0065] A multi-frequency noise filter range hood with through holes distributed according to the arrangement area, such as Figure 6 As shown, other features are the same as in Embodiment 1, the difference is that there is a gap between the panel 11 and the wall closest to the hood main body 2, and the distance of the gap is defined as H 1 . The noise filtering device 1 is also provided with a sound-absorbing part 12, and the sound-absorbing part is assembled with the main body 2 of the cigarette machine. The thickness of the sound-absorbing part 12 is defined as H 2 , and H 2 ≤0.6H 1 .
[0066] The sound absorbing part 12 of this embodiment is fixed on the outer surface of the panel 11 . It should be noted that the sound-absorbing part 12 of the present invention can also be fixed on the surface of the wall closest to the panel 11 and the main body 2 of the hood or the sound-absorbing part 12 can be fixed between the wall gap between the panel 11 and the main body 2 of t...
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