Kitchen ventilator shell with noise interference device and kitchen ventilator
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A range hood and noise technology, applied in the field of range hood shells and range hoods, can solve the problems of large air pressure loss, difficulty in selecting sound-absorbing cotton, and uncontrollable noise reduction frequency of sound-absorbing cotton.
Pending Publication Date: 2019-02-22
FOSHAN VIOMI ELECTRICAL TECH +1
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However, there are several disadvantages as follows: 1. The air pressure loss is too large, noise and fluid need to pass through the sound-absorbing cotton, and use friction to consume sound energy to achieve the effect of noise reduction, but at the same time reduce the performance of the air
2. It is difficult to choose suitable sound-absorbing cotton. Few suppliers can provide data on the sound-absorbing rate of sound-absorbing cotton at different frequencie...
Method used
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Embodiment 1
[0040] A range hood housing with a noise interference device such as Figures 1 to 6 As shown, a housing main body 2 and a noise interference device 1 for reducing multi-frequency noise are provided, and the noise interference device 1 is assembled on the housing main body 2 .
[0041] The noise interference device 1 is provided with two openings, and the horizontal positions of the two openings are different.
[0042] Define the opening close to the air inlet of the main duct as K 1 , the opening close to the air outlet of the main air duct is defined as K 2 .
[0043] The noise interference device 1 achieves noise reduction of specific multi-frequency noise by adjusting the areas of the two openings, the overall length of the noise interference device 1 or the shortest distance between the two openings.
[0044] The length of the noise interference device 1 of the present invention is defined as L a , and 0a ≤1000mm, L in this embodiment a Specifically, it is 300mm.
...
Embodiment 2
[0084] A range hood casing with a noise interference device, such as Figure 7 As shown, other features are the same as those in Embodiment 1, except that the housing body 2 of the present invention is also provided with a decorative cover 3 for shielding the noise interference device 1 , and the decorative cover 3 is assembled on the outer surface of the housing body 2 .
[0085] Compared with Embodiment 1, the noise interference device 1 of the range hood casing of this embodiment is covered, and the appearance is cleaner.
Embodiment 3
[0087] A range hood has a range hood housing with a noise interference device.
[0088] The range hood has a range hood housing with a noise interference device. The range hood can maintain a good noise reduction effect for a long time, and the noise interference device 1 has the advantages of low cost and high reliability. The range hood can reduce specific multi-frequency noise for reduction.
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Abstract
A kitchen ventilator shell with a noise interference device is provided with a shell body and the noise interference device for reducing multi-frequency noise. The noise interference device is assembled to the shell body. Specific multi-frequency noise lowering is achieved by adjusting the area of two openings of the noise interference device, the integral length of the noise interference device or the shortest distance between the two openings. A long-term good noise lowering effect can be kept for the kitchen ventilator shell, and the noise interference device has the advantages that cost islow and reliability is high. The noise interference device interferes with noise transmitted in a main air flue pipe through the resonance amplitude and phase position of the specific noise frequency, accordingly, the amplitude of the noise frequency is reduced, and noise lowering of the specific multi-frequency noise is achieved. The material of the noise interference device is resistant to corrosion and chemical corrosion and is not prone to damage. The long-term good noise lowering effect can be kept for a kitchen ventilator, and the noise interference device has the advantages that cost is low and reliability is high.
Description
technical field [0001] The invention relates to the field of range hoods, in particular to a range hood casing with a noise interference device and the range hood. Background technique [0002] Long-term exposure to high-noise environments can damage people's hearing, and long-term exposure to high-noise environments can also cause emotional problems for users. With the improvement of people's quality of life, people's tolerance to noise is getting lower and lower. Therefore, the noise reduction of range hoods has also received more and more attention. [0003] The noise reduction of range hoods in the prior art mostly achieves noise reduction through active noise reduction and passive noise reduction. The active noise reduction method can only act on the noise with a frequency within 1000Hz, and the noise above 1000Hz can only be processed by passive noise reduction technology. However, passive noise reduction is mainly done by wrapping the noise source or pipe with soun...
Claims
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Application Information
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