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Range Hoods and Noise Reduction Methods

A range hood and noise reduction technology, applied in the range hood and noise reduction field, can solve the problems of low-frequency hum and interference that cannot be eliminated by users

Active Publication Date: 2020-03-31
GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rise of the high-power range hood market in recent years, users are more satisfied with the smoking effect of high-power range hoods, but high-power range hoods are also caused by their own characteristics of large suction, high negative pressure, and large air volume The noise problem is becoming more and more prominent, and even the noise problem has become an important factor for users to consider when purchasing a high-power range hood. After all, when the user is using the range hood, the distance between the human ear and the range hood is less than 50cm, and the noise will interfere with the human ear. It is very large, and therefore, the noise problem of high-power range hoods is always the focus of user complaints
The noise reduction range hoods in the prior art either use aerodynamics to optimize the centrifugal fan or the volute, or use vibration-absorbing and sound-absorbing materials to reduce the noise of the medium and high-frequency airflow, but the above-mentioned solutions cannot eliminate Low-to-medium frequency hum in range hoods that users are extremely disgusted with

Method used

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  • Range Hoods and Noise Reduction Methods
  • Range Hoods and Noise Reduction Methods
  • Range Hoods and Noise Reduction Methods

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0084] When the user uses the range hood to cook, turn on the switch of the noise reduction device on the range hood, the microphone in the noise reduction device starts to collect the noise of the motor and impeller rotation in the range hood, and the noise generated by the impact of these noises in the volute The noise signals generated by these noises are amplified by the amplifier circuit and converted by the analog-to-digital conversion circuit, and then output to the controller. The noise reduction determination module in the controller receives the noise signal, calls the noise reduction function stored in the storage module, calculates the noise reduction signal with the same amplitude and opposite phase as the noise signal collected by the microphone, and outputs the calculated good Noise reduction control signal. The noise reduction control signal is digital-to-analog converted by the digital-to-analog conversion circuit, amplified by the power amplifier circuit, and...

specific Embodiment 2

[0086] Such as figure 1 with figure 2 As shown, the range hood is preferably a side suction range hood. The door body is a resonant sound-absorbing cavity with a triangular cross-section. The sound is composed of a speaker and a cavity. A control unit electrically connected to the microphone is provided on the main control board of the main control board as a controller. In addition, a speaker electrically connected to the control unit is provided under the microphone, wherein the microphone is fixed on the front of the volute of the range hood through a fixing block. In the process of using the range hood, the direction of the speaker is the front of the range hood, so that the propagation direction of the noise reduction played by the speaker is adjusted to the direction towards the user.

[0087] The embodiments of the present invention have been described in detail above. The present invention proposes a range hood and a noise reduction method. Through the noise reductio...

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PUM

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Abstract

The invention provides a range hood and a noise reduction method. The range hood comprises an enclosure and a door body assembly which is pivoted and hinged with the enclosure, and further comprises an oil absorption fan which is arranged inside the enclosure, a noise reduction housing which is arranged at one side of the door body assembly and is projected towards one side of the oil absorption fan from the door body assembly, a noise transmission device which is fixedly arranged on the inner part of the enclosure, a loud-speaking device which is arranged on a first plate of the noise reduction housing, and a controller which is electrically connected with the noise transmission device and the loud-speaking device, and is arranged in the noise reduction housing; while in a working state,the range hood responds to a noise signal emitted by the noise transmission device and sends a noise-reduced control signal to the loud-speaking device. According to the technical scheme adopted by the invention, the hardware is arranged on the range hood, and reduced noises which are the same in noise vibration amplitude and are opposite in phase can be generated and played, so that medium-low-frequency noises in the range hood can be effectively reduced, good use experience is given to a user, and the noise interference trouble during use of the range hood is avoided.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a range hood and a noise reduction method. Background technique [0002] With the rise of the high-power range hood market in recent years, users are more satisfied with the smoking effect of high-power range hoods, but high-power range hoods are also caused by their own characteristics of large suction, high negative pressure, and large air volume The noise problem is becoming more and more prominent, and even the noise problem has become an important factor for users to consider when purchasing a high-power range hood. After all, when the user is using the range hood, the distance between the human ear and the range hood is less than 50cm, and the noise will interfere with the human ear. It is very large, and therefore, the noise problem of high-power range hoods has always been the focus of user complaints. The noise reduction range hoods in the prior art either use aerody...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24C15/20
CPCF24C15/2021
Inventor 李忠华李长明程杰锋
Owner GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD