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Range hood with bellows for noise filtering function

A technology for noise filtering and range hoods, applied in the direction of removing oil fumes, mechanical equipment, machines/engines, etc., can solve the problems of increasing the size of the range hood, increasing the overall weight of the range hood, etc., to reduce narrow-band noise and broadband noise, and minimize Minimized size design, high reliability effect

Active Publication Date: 2020-06-09
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
In the prior art, for passive noise reduction, it is necessary to add an additional passive noise reduction device inside the range hood, which leads to an increase in the size of the range hood, and increases the production cost and the overall weight of the range hood

Method used

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  • Range hood with bellows for noise filtering function
  • Range hood with bellows for noise filtering function
  • Range hood with bellows for noise filtering function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A range hood with a bellows for noise filtering, such as Figure 1-4 As shown, the main body of the hood and the bellows 1 capable of eliminating multi-frequency noise are provided, and the bellows 1 is assembled inside the main body of the hood. The bellows 1 is formed by splicing a plurality of panels 11, and the panels 11 are distributed with a plurality of through holes 111 for eliminating noise.

[0043] The main body of the hood is provided with an outer cover 2 , and the bellows 1 is assembled inside the outer cover 2 . There are multiple panels 11 , and multiple panels 11 are spliced ​​to form a continuous and limited enclosure around the bellows 1 . Specifically, there are five panels 11 in this embodiment, and the five panels 11 are spliced ​​to form a polyhedron with an open bottom.

[0044] It should be noted that the number of panels 11 of the present invention can be 5, or any number of 2 or more, as long as the panels 11 can only be spliced ​​to form a ...

Embodiment 2

[0054] A range hood with a bellows for noise filtering, such as Figure 5 As shown, other characteristics are the same as those in Embodiment 1, except that: the bellows 1 is also provided with a sound-absorbing part 12, and the sound-absorbing part is assembled with the main body of the cigarette machine. The thickness of the sound absorbing part 12 is defined as H 2 , and H 2 ≤0.6H 1 .

[0055] The sound absorbing part 12 of this embodiment is fixed in the gap.

[0056]The density and material of the sound-absorbing part 12 also have an important influence, and sound waves will directly pass through the ultra-low-density sound-absorbing part, and there is no way to increase the friction loss of sound energy. Under high density, the noise sound wave will be reflected directly, and there is no way to enter the hole of the bellows 1 .

[0057] Therefore, the sound absorbing part 12 of the present invention is preferably fiber, PP cotton, polyester fiber, carbon fiber or po...

Embodiment 3

[0060] A range hood with a bellows for noise filtering, such as Figure 6 As shown, other features are the same as those in Embodiment 1, except that the panel 11 of this embodiment is specifically a metal panel 11 . The bellows 1 eliminates noise with a frequency range of 100 Hz to 8000 Hz.

[0061] It should be noted that the panel 11 of the present invention may also be a plastic panel 11 or an alloy panel 11 , and the specific implementation depends on the actual situation.

[0062] The thickness of the panel 11 of the present invention is less than 20 mm, because too thick will increase the weight of the bellows 1 .

[0063] The panel 11 of this embodiment is integrally connected with a strengthening structure 112 . The specific strengthening structure 112 is a reinforcing rib.

[0064] It should be noted that the reinforcing structure 112 of the present invention can also be one of reinforcing ribs, convex or concave, or can be any combination of multiple types. The s...

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Abstract

A kitchen ventilator with an air bellow having a noise filtration function comprises a kitchen ventilator body and the air bellow capable of eliminating multi-frequency noise. The air bellow is assembled into the kitchen ventilator body, and is arranged as a panel with a plurality of through holes for eliminating the multi-frequency noise. The kitchen ventilator has the advantages that internal space of the kitchen ventilator can be utilized effectively, minimized dimensional design can be realized, and overall weight can be reduced; the noise can be reduced at or near a noise source, namely afan; the multi-frequency noise reduction is implemented by adjusting combination of the diameters of the different through holes, minimum distances between the edges of the adjacent through holes, regional distribution of the through holes of the panel, or the distance between the air bellow and the kitchen ventilator body; the kitchen ventilator has the advantages of low cost and high reliability; 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 bellows for noise filtering. 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. In the prior art, for passive noise reduction, it is necessary to add an additional passive noise reduction device ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24C15/20F04D29/66
CPCF04D29/664F24C15/20
Inventor 陈小平林勇进李健鹏李思成
Owner FOSHAN VIOMI ELECTRICAL TECH
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