A control method with ideal noise reduction effect of hood

A control method and technology for hoods, which are applied in heating methods, oil fume removal, household stoves/stoves, etc., can solve the problem that the structure is difficult to adapt to complex noise environments, the noise sources of hoods have large spectrum differences, reduce turbulence and resonance noise, etc. problem, to avoid the backflow of oil fume, improve noise reduction, and improve the effect of noise reduction

Active Publication Date: 2020-08-21
杭州九创家电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Mechanical noise reduction and sound insulation: The noise generated by the turbulent flow of the volute can be reduced through the noise reduction design of the volute and the air outlet structure of the hood. However, due to the large difference in the noise source spectrum of the hood, a single structure is difficult to adapt Various complex noise environments
[0004] 2. Brushless DC motor frequency conversion speed regulation, low frequency operation and better power output can reduce the running noise of the fan to a certain extent, but it cannot fundamentally effectively reduce the disturbance and resonance noise
[0005] 3. The active noise reduction technology has gradually been recognized by everyone in the past two years. By sampling the environmental noise and outputting a signal with the phase inversion and the same amplitude as the noise, the effect of reducing the noise of the hood is achieved. Due to the distance between the human ear and the smoke The machine is far away, people and the smoke machine are not a whole and are in a confined space, the interference of environmental noise, and the active noise reduction effect is poor

Method used

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  • A control method with ideal noise reduction effect of hood
  • A control method with ideal noise reduction effect of hood
  • A control method with ideal noise reduction effect of hood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as figure 1 As shown, a noise reduction control method for a range hood may include: Step 101 to Step 103 .

[0060] Step 101: Vibration compensation is performed on the components of the hood according to the preset compensation frequency spectrum.

[0061] Step 102: Collect the noise audio of the hood.

[0062] Step 103: If the noise audio frequency of the hood does not meet the predetermined condition, then adjust the compensation spectrum mentioned above.

[0063] It should be noted that the sequence between step 102 and step 101 is not limited here, and step 101 and step 102 can be executed simultaneously. Or start to execute step 101 first, and then start to execute step 102. For example, the compensation spectrum is preset when the hood leaves the factory.

[0064] Or start to execute step 102 first, and then start to execute step 101. For example, first start to execute step 102: collect the noise audio of the hood; Perform vibration compensation for t...

Embodiment 2

[0073] On the basis of the first embodiment, the embodiment of the present invention adds the detection of the check valve of the hood and the detection of the impeller of the hood. Such as figure 2 As shown, in addition to steps 101 to 103, the noise reduction control method for a hood may also include steps 104 to 112.

[0074] Step 104, detecting whether the check valve of the hood is abnormal, and performing step 105 when the check valve of the hood is detected to be abnormal.

[0075] Optionally, in step 104, the noise audio generated by the hood check valve is extracted from the noise audio of the hood; and whether the hood check valve is abnormal is detected according to the noise audio generated by the hood check valve.

[0076] For example, if the audio frequency of the noise generated by the hood check valve satisfies: the frequency is in the range of 1Hz-2KHz, and the amplitude is greater than 65db, it can be determined that the hood check valve is abnormal.

[0...

Embodiment 3

[0098] In the embodiment of the present invention, on the basis of the first embodiment, a step of judging the number of adjustments of the compensation spectrum is added after step 102 and between step 103 . Such as image 3 As shown, in addition to steps 101 to 103, the noise reduction control method for a hood may also include steps 113 to 116.

[0099] Step 113: When the noise audio of the hood does not meet the predetermined condition in step 102, determine whether the number of adjustments of the compensation spectrum is greater than the second preset threshold, wherein the initial value of the number of adjustments of the compensation spectrum is Y, and Y is an integer, for example, The second preset threshold is 3, Y=0. If it is determined that the number of adjustments of the compensation spectrum is greater than the second preset threshold, step 115 is performed;

[0100] Step 114: Add 1 to the adjustment times of the compensation spectrum

[0101] Step 115: Execute...

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Abstract

The embodiment of the invention discloses a ranged hood noises reduction effect ideal control method. The range hood noise reduction control method comprises the following steps that vibration compensation is carried out to range hood parts according to the preset compensation frequency spectrum; noise audio of the range hood is collected; and if the noise audio of the range hood fails to meet preset conditions, the compensation frequency spectrum is adjusted. Through the adjustment of the compensation frequency spectrum, close-cycle control of the vibration compensation to the range hood parts is achieved, and therefore the noise reduction of the range hood is better carried out, and the noise reduction effect is improved.

Description

technical field [0001] Embodiments of the present invention relate to kitchen appliance technology, especially to a noise reduction control method for a range hood. Background technique [0002] Noise has become one of the three main pain points of the hood. During the operation of the hood, the air duct disturbance, body and volute vibration are the main noise sources. At present, the main noise reduction method of the hood is through the following aspects To implement: [0003] 1. Mechanical noise reduction and sound insulation: The noise generated by the turbulent flow of the volute can be reduced through the noise reduction design of the volute and the air outlet structure of the hood. However, due to the large difference in the noise source spectrum of the hood, a single structure is difficult to adapt Various complex noise environments. [0004] 2. Brushless DC motor frequency conversion speed regulation, low frequency operation and better power output can reduce the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24C15/20
CPCF24C15/2021
Inventor 朱泽春陈震
Owner 杭州九创家电有限公司
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