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A noiseless exhaust device with dual air ducts based on sound wave interference

An exhaust device and double air duct technology, applied in the direction of noise suppression, ventilation system, space heating and ventilation, etc., can solve problems such as poor ventilation effect, noise of exhaust outlet, noise pollution of fresh air system, etc., and achieve elimination Work noise, wind noise elimination effect

Active Publication Date: 2022-08-02
陈 宇翔
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is that it is necessary to provide a solution to the noise problem at the air outlet of the fresh air system, which can solve the problems of noise pollution and poor ventilation effect of the fresh air system in the home installation,

Method used

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  • A noiseless exhaust device with dual air ducts based on sound wave interference
  • A noiseless exhaust device with dual air ducts based on sound wave interference
  • A noiseless exhaust device with dual air ducts based on sound wave interference

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Embodiment 1

[0035] The invention utilizes the mutual interference effect of sound waves in the transmission process. When the sound waves emitted by two sound sources with the same frequency, the same vibration direction and the same pace are superimposed on each other, the interference phenomenon will occur. If they are in the same phase, the amplitude of the two waves will increase and the sound pressure will be strengthened; on the contrary, their phase is opposite, and the amplitude of the two waves will decrease and the sound pressure will weaken. If the amplitudes of the two waves are the same, they will completely cancel. Due to the interference of sound waves, the sound field in space often has a fixed distribution, forming peaks and valleys. From the frequency response curve, it looks like the effect of a comb filter, that is, the standing wave phenomenon that is often said in sound terms.

[0036] like figure 1 and figure 2 As shown in the figure, the present invention provide...

Embodiment 2

[0052] like Figure 4 As shown in the figure, this embodiment is further improved on the basis of Embodiment 1, the difference is that in this embodiment, a noise-free air exhaust device with dual air ducts based on sound wave interference is provided, and the two air ducts 3 are arranged on each other. Connect the "8"-shaped structure, wherein the thickness of the air duct 3 is a=5mm, the radius r=95mm, the center hole distance of the two air ducts 3 is C2 is 2e, and the numerical range of the e is 55 Odd multiples of ~70mm, the preferred value is: 65mm, and the rotation speed of the fan 6 is selected as 1500 rpm or 2500 rpm, which can reduce or even eliminate noise.

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Abstract

The invention belongs to the technical field of air exhaust equipment, and in particular relates to a noiseless air exhaust device with double air channels based on sound wave interference. The invention provides a noiseless air exhaust device with double air ducts based on sound wave interference. There is a spiral groove on the inner wall of the air duct between the air duct and the exhaust mask. The two ends of the spiral groove are open and the middle is closed. The air inlet of the air duct is provided with an indoor exhaust mask. The indoor exhaust mask is provided with a mask control motor. The other end of the channel is provided with a check valve, and the outside of the check valve is provided with a rain cap. The invention uses double air ducts to increase the ventilation cross-sectional area, reduces the wind speed under the condition of satisfying the ventilation volume, and the helical grooves on the inner wall of the air duct form sound wave interference, reduce or even eliminate noise, and the two low-power exhaust fans work synchronously to exhaust the air. The working noise of the fan is reduced to a minimum, while ensuring sufficient ventilation.

Description

technical field [0001] The invention belongs to the technical field of air exhaust equipment, and in particular relates to a noiseless air exhaust device with double air channels based on sound wave interference. Background technique [0002] At present, with the development of China's building ventilation industry, especially driven by smog, the fresh air system has gradually entered people's field of vision and began to enter thousands of households. The fresh air system is an independent air treatment system composed of an air supply system and an air exhaust system. It filters the fresh air from the outside and inhales it into the room, while exhaling the polluted indoor air to the outside to realize the replacement of the indoor air, so as to keep the indoor air. The cleanliness of the air provides a clean, oxygen-rich and healthy home environment and protects the health of the family. [0003] At present, there are still problems such as noise pollution and ventilatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F7/06F24F11/89F24F13/24
CPCF24F7/065F24F11/0001F24F11/30F24F11/62F24F11/77F24F13/24F24F11/64F24F2013/247Y02B30/70
Inventor 陈宇翔
Owner 陈 宇翔
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