Range hood with active noise reduction function

Abstract

The invention discloses a range hood with an active noise reduction function. The range hood comprises a range hood main body and an active noise reduction device fixedly arranged on the range hood main body, wherein the active noise reduction device is provided with a first noise sensor, a loudspeaker, a second noise sensor and an active noise reduction system. Compared with a range hood with a traditional passive noise reduction mode which can only be used for reducing noise above 500 Hz although the leakproofness and material are good, the range hood with the active noise reduction functioncan actively generate reverse sound waves with the same frequency as the outside noise through the active noise reduction device to neutralize the noise so that the noise reduction effect can be achieved. The range hood with the active noise reduction function can enable oil smoke particles to not pass through an air draft assembly, an oil film cannot be attached to a wind wheel in the air draftassembly even with the increase of the use time, load-bearing work is not needed, and therefore low-noise work can be kept all the time. The range hood with the active noise reduction function has theadvantage that the noise of different frequencies can be greatly reduced when the range hood works.

Description

technical field [0001] The invention relates to the field of range hoods, in particular to a range hood with an active noise reduction function. Background technique [0002] With the increasingly accelerated pace of life and work, people need a quieter and more comfortable environment when working, studying, and resting. Therefore, noise pollution has become the main factor affecting people's quality of life. At the moment when noise pollution is becoming more and more serious, people Only the noise reduction control of the electrical appliances that are in contact with the surrounding is getting higher and higher. The range hood is one of the essential electrical appliances in today's family. The range hood is installed above the kitchen stove to absorb the oil fume generated during cooking, so that it can be exhausted outside to reduce kitchen air pollution. But because of the rotation of the fan wheel of the range hood and the vibration of the main body of the range ho...

AI Technical Summary

Problems solved by technology

But because of the rotation of the fan wheel of the range hood and the vibration of the main body of the range hood, there will be a lot of noise, and when the range hood is used for a long time, the wind wheel in the traditional range hood will be attached with a thick oil film, which will make the wind wheel load work, which greatly increases the noise when the range hood is working

Traditional noise reduction methods mainly rely on good airtightness and material characteristics to reduce noise isolation to a certain extent, and generally only target higher frequency sounds above 500Hz

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