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Range hood with gesture control and visual detection functions, and noise reduction method thereof

A visual detection and gesture control technology, which is applied in the fields of oil fume removal, heating method, and home heating, etc. It can solve the problems of noise reduction, increase the difficulty of noise reduction in three-dimensional space, and cannot adapt to high-order sound.

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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  • Range hood with gesture control and visual detection functions, and noise reduction method thereof
  • Range hood with gesture control and visual detection functions, and noise reduction method thereof
  • Range hood with gesture control and visual detection functions, and noise reduction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] A cooker hood with gesture control visual detection function, such as Figures 1 to 10 As shown, a hood main body 1, a three-dimensional sound field noise reduction device 2 for active noise reduction, and a visual detection system 3 are provided. Machine main body 1 inside. The visual inspection system 3 and the three-dimensional sound field noise reduction device 2 are respectively electrically connected to the main board of the hood main body 1 . The visual detection system 3 is provided with a gesture recognition module 33, and the gesture recognition module 33 is electrically connected to the main board of the cigarette machine. The gesture recognition module 33 recognizes the user's hand movement to obtain a gear adjustment instruction signal, and then transmits the gear adjustment instruction signal to the hood main board.

[0100] The visual detection system 3 is also provided with a smoke level judging module 32, which is electrically connected to the main bo...

Embodiment 2

[0131] A range hood with a gesture control visual detection function, 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.

[0132] 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.

[0133] 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.

[0134] Compared with Embodiment 1, the noise reduction effect of the range hood of this embodiment is better.

Embodiment 3

[0136] A range hood with a gesture-controlled visual detection function, other features are the same as in Embodiment 1, the difference is that the visual detection system 3 and the three-dimensional sound field noise reduction device 2 of this embodiment are independently activated.

[0137] The working process is as follows: when the main body 1 of the hood is turned on, the main board of the hood provides power for the visual detection system 3 and the three-dimensional sound field noise reduction device 2, and the user chooses to turn on the visual detection system 3 and the three-dimensional sound field noise reduction device 2 according to the actual situation. Noise reduction is performed when the three-dimensional sound field noise reduction device 2 is turned on.

[0138] Compared with Embodiment 1, this embodiment can selectively enable the visual detection system 3 and the three-dimensional sound field noise reduction device 2, which improves the flexibility.

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Abstract

The invention discloses a range hood with gesture control and visual detection functions, and a noise reduction method thereof. The range hood is provided with a range hood main body, a three-dimensional space sound field noise reduction device for active noise reduction, and a visual detection system, the visual detection system is assembled on the range hood main body, and the three-dimensionalspace sound field noise reduction device is assembled in the range hood main body. The range hood decomposes a noise signal into multiple sub-band signals, the sub-band signals are converted to obtainband pass filter weight vectors, the obtained band pass filter weight vectors are converted to generate corresponding loudspeaker sound fields, the equal-intensity sound wave signals are transmittedto corresponding loudspeakers, and sound waves generated by the corresponding loudspeakers 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 andmetal 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 with a gesture control visual detection function 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 modes. But in thre...

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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