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Noise reduction device and exhausting assembly linked range hood, and noise reduction method thereof

A range hood and noise reduction technology, which is applied in the fields of oil fume removal, heating methods, household heating, etc., can solve problems such as inability to adapt to high-order sound, difficulty in noise reduction, and difficulty in increasing noise reduction in three-dimensional space

Active Publication Date: 2018-11-30
FOSHAN VIOMI ELECTRICAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve low noise, the current range hoods generally directly set low air volume, that is, sacrifice the performance of the range hood to achieve low noise, but the effect of the range hood is greatly reduced; Noise reduction device, but its active noise reduction can only reduce noise within 1000Hz, and cannot adapt to high-order acoustic modes
But in three-dimensional space, high-order acoustic modes cannot be ignored, especially in closed large-space pipelines, noise reduction is very difficult and complicated
Usually, a variety of standing waves and a variety of sound waves in different directions interfere with each other and superimpose, which greatly increases the difficulty of noise reduction in three-dimensional space

Method used

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  • Noise reduction device and exhausting assembly linked range hood, and noise reduction method thereof
  • Noise reduction device and exhausting assembly linked range hood, and noise reduction method thereof
  • Noise reduction device and exhausting assembly linked range hood, and noise reduction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0090] A range hood in which a noise reduction device is linked with an exhaust assembly, such as Figures 1 to 9 As shown, there are a hood main body 1 , an exhaust assembly 12 and a three-dimensional sound field noise reduction device 2 for active noise reduction. The ventilation assembly 12 is connected in linkage with the three-dimensional sound field noise reduction device 2 .

[0091] The ventilation assembly 12 of this embodiment starts simultaneously with the three-dimensional sound field noise reduction device 2 .

[0092] 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.

[0093] The low-damping bellows 11 is provided with a plurality of bellows panels and a noise filtering device 111 , the multiple bellows panels are spliced ​​into a three-dimensional structure, and the noise filtering device 111 is assembled on the inner...

Embodiment 2

[0115] A range hood in which the noise reduction device is linked with the exhaust assembly, the other features are the same as in Embodiment 1, the difference is that the three-dimensional sound field noise reduction device 2 is delayed after the exhaust assembly 12 starts. The delay time of the present invention is 0.5s˜10s, and the delay time of this embodiment is 1s.

[0116] Compared with Embodiment 1, the three-dimensional sound field noise reduction device 2 of this embodiment is delayed compared with the opening of the ventilation assembly 12. For example, after the ventilation assembly 12 runs smoothly, the three-dimensional space sound field noise reduction device 2 performs calculation and noise reduction again. Reduce unnecessary energy consumption.

Embodiment 3

[0118] A range hood in which the noise reduction device is linked with the exhaust assembly, 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.

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Abstract

The invention discloses a noise reduction device and exhausting assembly linked range hood, and a noise reduction method thereof. The range hood is provided with a range hood main body, an exhaustingassembly and a three-dimensional space sound field noise reduction device for active noise reduction, and the exhausting assembly and the three-dimensional space sound field noise reduction device arerespectively assembled in the range hood main body. The exhausting assembly is in linkage connection with the three-dimensional space sound field noise reduction device. A noise signal is decomposedinto multiple sub-band signals, the sub-band signals are converted to obtain a band pass filter weight vector, the obtained band pass filter weight vector is converted to generate a corresponding loudspeaker sound field, the equal-intensity sound wave signal is transmitted to a corresponding loudspeaker, and sound waves generated by the corresponding loudspeaker can reduce or offset noise sound waves generated by the range hood in order to realize noise reduction. The range hood overcomes the technical difficulty of mutual contradiction between noises and performances, and realizes small noises generated during the running of the range hood and no physiological and metal negative influences on users without sacrificing the performances of the range hood.

Description

technical field [0001] The invention relates to the field of range hoods, in particular to a range hood in which a noise reduction device is linked with an exhaust assembly and a noise reduction method. Background technique [0002] The current active noise reduction technology, such as the application of earphones, is a point-to-point noise reduction technology, that is, directional noise reduction, which cannot effectively eliminate noise in a large range. These techniques focus on eliminating one-dimensional plane sound waves in closed small ducts or small spaces, and are effective in the low frequency range (less than 500Hz). In order to achieve low noise, the current range hoods generally directly set low air volume, that is, sacrifice the performance of the range hood to achieve low noise, but the effect of the range hood is greatly reduced; Noise reduction device, but its active noise reduction can only reduce noise within 1000Hz, and cannot adapt to high-order sound...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C15/20
CPCF24C15/2021F24C15/2035Y02B30/70
Inventor 陈小平林勇进李健鹏李思成
Owner FOSHAN VIOMI ELECTRICAL TECH
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