Low-damping full-surrounded three-dimensional sound field noise reduction range hood and noise reduction method thereof
A three-dimensional space, low damping technology, applied in the direction of oil fume removal, heating methods, household heating, etc., can solve the problems of difficult and complex noise reduction, and increase the difficulty of noise reduction in three-dimensional space
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Embodiment 1
[0091] A low-damping fully-enclosed three-dimensional sound field noise-reducing range hood, such as Figures 1 to 10 As shown, a hood main body 1 and a three-dimensional sound field noise reduction device 2 are provided, and the three-dimensional sound field noise reduction device 2 is assembled inside the hood main body 1 . The main body 1 of the range hood is provided with a low damping bellows 11 for reducing broadband vibration, and the low damping bellows 11 is assembled inside the main body 1 of the range hood. The exhaust assembly 12 of the main body of the hood 1 is assembled inside the fully enclosed structure formed by the filter screen 115 of the air inlet and the low damping air box 11 .
[0092] The fully enclosed structure can optimize the performance of the hood, but at the same time complete the work under low-noise operation, and solve the technical difficulties of the contradiction between noise and performance. Without sacrificing the performance of the ran...
Embodiment 2
[0118] A low-damping full-enclosed three-dimensional sound field noise-reducing range hood, other features are the same as in Embodiment 1, the difference is that the outer surface of the low-damping bellows 11 of this embodiment is equipped with a foam board.
[0119] It should be noted that the outer surface of the low-damping bellows 11 of the present invention may be equipped with a foam board, or any one of a foam board or a rubber board.
[0120] The role of the foam board, foam board or rubber board is to block the noise from spreading to the outside, thereby reducing the noise level.
[0121] Compared with Embodiment 1, the noise reduction effect of the range hood of this embodiment is better.
Embodiment 3
[0123] A low-damping fully enclosed three-dimensional sound field noise reduction range hood, the noise reduction frequency range of the three-dimensional sound field noise reduction device 2 is 100Hz-2000Hz.
[0124] It breaks through the limitation of the existing technology that active noise reduction can only reduce noise within 1000Hz, and effectively reduces noise to a maximum noise frequency domain of 2000Hz.
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