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A noise reduction control method for a smoke machine

A control method and hood technology, applied in heating methods, oil fume removal, household stoves, etc., can solve the problems of poor active noise reduction effect, reduction of turbulence and resonance noise, interference, etc., to achieve good noise reduction and improvement Noise reduction effect, the effect of improving user experience

Active Publication Date: 2019-12-31
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 noise reduction control method for a smoke machine
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  • A noise reduction control method for a smoke machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Such as figure 1 As shown, a noise reduction control method for a range hood may include: Step 101 to Step 103 .

[0059] Step 101: Vibration compensation is performed on the components of the hood according to the preset compensation frequency spectrum.

[0060] Step 102: Detect the vibration spectrum of the smoke machine components.

[0061] It should be noted that the vibration spectrum of the hood components includes: the vibration frequency of the hood components and the vibration amplitude of the hood components.

[0062] Step 101 includes: taking the vibration frequency of the components of the range hood as the frequency in the compensation spectrum, and taking the vibration amplitude of the components of the range range unchanged and the phase inversion as the amplitude in the compensation spectrum; components for vibration compensation.

[0063] Optionally, in step 102, the vibration spectrum of the components of the cigarette machine may be detected by a v...

Embodiment 2

[0075] 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 108.

[0076] Step 104: Detect whether the check valve of the hood is abnormal, and execute step 105 when the check valve of the hood is detected to be abnormal.

[0077] Optionally, in step 104, it may be detected whether the check valve of the smoke machine is abnormal according to the vibration frequency spectrum of the check valve of the smoke machine.

[0078] For example, if the vibration frequency of the hood check valve is in the range of 100 Hz-500 Hz, and / or the vibration amplitude of the hood check valve is greater than 0.3 mm / S, it can be detected that the hood check valve is abnormal.

[0079] The vibration spectrum of the check valve of the hood ca...

Embodiment 3

[0095] 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 109 to 112.

[0096] Step 109: After step 102, and when the vibration spectrum of the hood components does not meet the set conditions, determine whether the number of adjustments to the compensation spectrum is greater than the second preset threshold, where the initial value of the number of adjustments to the compensation spectrum is Y, and Y is Integer (such as Y=0). When it is determined that the number of adjustments of the compensation spectrum is greater than the second preset threshold, step 111 is performed;

[0097] Step 110: Add 1 to the adjustment times of the compensation spectrum, and return to step 102.

[0098] Step 111: Exec...

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Abstract

The embodiment of the invention discloses a method for controlling noise reduction of a smoke exhaust ventilator. The method comprises performing vibration compensation on a smoke exhaust ventilator component according to a preset compensation frequency spectrum, detecting a vibration frequency spectrum of the smoke exhaust ventilator component, and if the vibration frequency spectrum of the smokeexhaust ventilator component does not satisfy the predetermined condition, adjusting the compensation frequency spectrum. Through adjusting the compensation frequency spectrum, the closed-loop control of the vibration compensation of the smoke exhaust ventilator component is realized so that the noise of the smoke exhaust ventilator is well reduced 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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