Noise reduction type air outlet hood for extractor hood
A range hood and noise reduction technology, which is applied in the field of noise reduction wind hood, can solve problems such as poor noise reduction effect, and achieve the effect of good noise reduction and noise reduction and the best noise reduction effect.
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[0026] Example one:
[0027] Such as Figure 1 to Figure 5 As shown, the noise-reducing air outlet hood of the range hood in this embodiment includes main components such as a base 1, an inner cover 2, an outer cover 3, and an air outlet ring 4. An upper sealing ring 41 is formed on the bottom of the air outlet ring 4, a lower sealing ring 11 is formed on the base 1, the top of the inner cover 2 is sealed and connected to the upper sealing ring 41, and the bottom of the inner cover 2 is sealed and connected to the lower sealing ring 11. The top of the outer cover 3 is fastened to the air outlet ring 4 by screws 6 and the bottom of the outer cover 3 is fastened to the base 1 by screws 6.
[0028] In this embodiment, a plurality of noise reduction holes 21 are opened on the peripheral wall of the inner cover 2. The noise reduction holes 21 are round holes, and a plurality of noise reduction holes 21 are formed between the inner cover 2 and the outer cover 3. Noise cavity 5. In thi...
Example Embodiment
[0032] Embodiment two:
[0033] Such as Image 6 As shown, the noise reduction cavity 5 of the air outlet hood of this embodiment is formed on the outer wall of the inner cover 2. Similarly, a noise reduction cavity 5 corresponds to a noise reduction hole 21. The noise reduction principle is the same as that of the first embodiment. This does not expand the description.
Example Embodiment
[0034] Embodiment three:
[0035] The noise reduction cavity 5 in this embodiment is a circular noise reduction cavity distributed along a horizontal plane, and the noise reduction holes 21 on the same horizontal circular surface are all arranged in the same circular noise reduction cavity.
[0036] Such as Figure 7 As shown, the ring noise reduction cavity is provided on the inner wall of the outer cover 3, such as Figure 8 As shown, the ring noise reduction cavity is provided on the outer wall of the inner cover 2. Figure 7 with Figure 8 In the two structures shown, multiple noise reduction holes 21 correspond to one noise reduction cavity 5 to form a parallel resonant cavity. The noise reduction principle is the same as that of the first embodiment, and the description will not be expanded here.
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