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Kitchen ventilator with multi-layer flow guide and noise filtration device

A technology of noise filtering and range hoods, applied in the field of range hoods, can solve the problems of different frequency of the maximum noise, lack of noise reduction effect of range hoods, reduction of noise frequency, etc., to reduce narrow-band noise and broadband noise, and easy to play Reasonable and reliable effect

Pending Publication Date: 2018-11-02
FOSHAN VIOMI ELECTRICAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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, the passive noise reduction device in the prior art cannot be set to reduce a specific noise frequency. For different range hoods, the frequency of the maximum noise that may be mainly generated is not the same. The range hoods in the prior art have not targeted the main frequency noise reduction
Since the frequency range of the noise generated by the range hood can range from 100Hz to 8000Hz, it is obvious that the passive noise reduction device for a single frequency band cannot produce a good noise reduction effect on the range hood

Method used

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  • Kitchen ventilator with multi-layer flow guide and noise filtration device
  • Kitchen ventilator with multi-layer flow guide and noise filtration device
  • Kitchen ventilator with multi-layer flow guide and noise filtration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A range hood with a multi-layer diversion noise filtering device, such as Figure 1-4 As shown, a hood main body 3, a volute 2 and a diversion noise filtering device 1 capable of reducing specific single-frequency noise or multi-frequency noise are provided.

[0057] The diversion noise filter device 1 and the volute 2 are respectively assembled inside the main body 3 of the hood, and the diversion noise filter device 1 cooperates with the volute 2 .

[0058] The diversion noise filtering device 1 is distributed with a plurality of through holes 111 for eliminating specific single-frequency noise or multi-frequency noise.

[0059] The diversion noise filtering device 1 is configured to be composed of multi-layer deflectors 11 , and the multi-layer deflectors 11 are respectively assembled inside the main body 3 of the hood.

[0060] The flow guide noise filtering device 1 is divided into a first flow guide plate 11 and a second flow guide plate 11 , and the first flow g...

Embodiment 2

[0078] A range hood with a multi-layer diversion noise filtering device, such as Figure 5 As shown, other characteristics are the same as in Embodiment 1, the difference is that: the through holes 111 of the first deflectors 11 of each layer of this embodiment are all aligned with the adjacent first deflectors 11, and the second deflectors of each layer are aligned with each other. The through holes 111 of the flow plate 11 are all aligned with the adjacent second flow guide plate 11 .

[0079] It has been proved by many times of experimental data that the through-holes 111 of each baffle 11 and the through-holes 111 of adjacent baffles 11 are all aligned with each other better.

[0080] It should be noted that the through holes 111 of each layer of the first deflectors 11 of the present invention may be aligned with each other in whole or in part with the adjacent first deflectors 11 . The through holes 111 of each layer of second deflectors 11 and the adjacent second defle...

Embodiment 3

[0083] A range hood with a multi-layer diversion noise filtering device, such as Image 6 As shown, other characteristics are the same as those in Embodiment 1, except that the taper portions 113 of each layer of the first deflector 11 in this embodiment are nested with each other, the panel bodies 114 are parallel to each other, and the panel bodies 114 are partially overlapped.

[0084] The tapered portions 113 of the second deflectors 11 of each layer are nested with each other, the panel bodies 114 are parallel to each other, and the panel bodies 114 are partially overlapped.

[0085] Compared with the first embodiment, the diversion noise filtering device 1 of the present embodiment has a larger surface area when the weight of the diversion noise filtering device 1 is the same, which can ensure a wider range of noise reduction.

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Abstract

A kitchen ventilator with a multi-layerflow guide and noise filtration device comprises a kitchen ventilator body, a volute and the flow guide and noise filtration device capable of eliminating noise.The flow guide and noise filtration device and the volute are assembled in the kitchen ventilator body. The flow guide and noise filtration device is matched with the volute. Specific single-frequency noise or multi-frequency noise reduction is implemented by adjusting combination of the diameters of different through holes, minimum distances between the edges of the adjacent through holes or thedistance between the flow guide and noise filtration device and the kitchen ventilator body. The flow guide and noise filtration device can keep a long-term good noise reduction effect, is easy to maintain and can be demounted for cleaning dust and grease on the surface; the flow guide and noise filtration device has the advantages of low cost and high reliability, is resistant to corrosion and chemicals and is not liable to damage; narrow-band noise and wide-band noise can be reduced effectively.

Description

technical field [0001] The invention relates to the field of range hoods, in particular to a range hood with a multi-layer guiding noise filtering device. 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, the passive noise reduction device of the prior art cannot be set to reduce specific noise fre...

Claims

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Application Information

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IPC IPC(8): F24C15/20
CPCF24C15/2035
Inventor 陈小平林勇进李健鹏李思成
Owner FOSHAN VIOMI ELECTRICAL TECH
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