CN1207481C

CN1207481C - Noise eliminator under natural ventilating status

Info

Publication number: CN1207481C
Application number: CN 02113726
Authority: CN
Inventors: 李庚武; 易湘萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-10
Filing date: 2002-05-10
Publication date: 2005-06-22
Anticipated expiration: 2022-05-10
Also published as: CN1456784A

Abstract

The present invention relates to a noise eliminating device in the natural ventilating state, which belongs to a noise isolating device, particularly to a device which is installed on a door/window of a building and has the advantages of natural ventilation and noise elimination. The device is characterized in that arc-shaped reflecting plates are alternately arranged in an enclosed frame material in a vertical direction; the center of the concave surface of the first reflecting plate is opposite to air inlet holes densely distributed on the surface of the frame material, and the convex surface of the reflecting plate is opposite to air outlet holes on the surface of the other end of the frame material. The device which has the advantages of simple structure and no need of power consumption can have a good noise eliminating effect in the natural ventilating state.

Description

The de-noising mixer of natural ventilation state

Technical field

The invention belongs to a kind of sound arrester, but particularly be loaded on both natural ventilations at building window place, the device that can abate the noise again.

Technical background

The control and management of modern city noise is limited in below 70 decibels, still, and for the people of live and work at the building housing-group of urban viaduct both sides and speedway both sides.Because the defective in the design of traditional building doors and windows has caused city noise to import into by building doors and windows, and the people that harassed can't be worked and have a rest.In order to eliminate noisy sound, conventional solution has: (1) installs noise barrier at both sides of highway, and the noise that motor vehicle is sent is reflected in the highway zone; (2) the forced ventilation sound arrester of mounting strap power on building absorbs noise with damping material, and simultaneously to indoor bubbling air.Latter's cost is higher, and complex structure need expend a large amount of energy, and blower unit causes the secondary noise toward the contact meeting; Though the former is simple in structure, cost is still higher, and erasure effect is not obvious, and high noisy easily worsens the environment on the road, causes accident.

Technology contents

The purpose of this invention is to provide a kind of de-noising mixer of natural ventilation state, it is simple in structure, does not need to expend power, also can reach good noise elimination effect under the state of natural ventilation.

According to the traffic noise frequency of the building housing-group actual measurement of urban viaduct both sides such as Guangzhou, Beijing, Shanghai and speedway both sides and high noisy, the distribute amount in decibels of noise, earth background noise, other noises of urban environment (as amusement noise, construction noise, industrial noise etc.) at most, the inventor analyzes for the frequency spectrum of city noise, find that traffic noise is mainly derived from automobile engine and the motor racing process that friction vibrations for viaduct cause, its sound source characteristic is low frequency and mobility.According to international city's working environment noise control standard in the requirement below 50 decibels, the design has used general principle of relativity, physics noise spectrum analysis principle, noise filter principle and aerodynamic principle, and the traffic noise that is primarily aimed in the city noise has carried out special design.The people that can solve the building housing-group live and work of urban viaduct both sides and speedway both sides with this device endure the problem that city noise is encroached on to the fullest extent.

Solving the scheme that technical problem of the present invention adopts is: alternatively up and down is equipped with the reflecting plate of arc in the frame material of sealing, the air inlet that gathers on the frame face in the concave surface center of first reflecting plate, and the reflecting plate convex surface is facing to the venthole on frame material other end surface.

After sound entered from the air inlet of sealing frame material, behind tortuous approach and a series of staggered arc baffle reflection up and down, the big high attenuation of its intensity arrived when indoor from venthole, almost eliminates; Because the passage that air flows is unimpeded in whole sealing frame material, therefore can open the window, just can keep natural ventilation.Simultaneously, both can reach more than the 30dB every noise; Also can be at typhoon, sandstorm is mad attack in, filter blocks dust, cut off rainwater

Description of drawings

Fig. 1 is a structural representation of the present invention.

Each label is represented successively among the figure: sealing frame material 1, reflecting plate 2, shelves soundboard 3, flexible material 4, air inlet 5, venthole 6.

Embodiment

Referring to Fig. 1, the profile of this device is loaded on the building window (not shown) for sealing frame material 1.Be drilled with densely covered air inlet 5 on its surface in the face of highway one side, a series of staggered reflecting plates 2 up and down are housed in sealing frame material 1, and the concave surface center of first reflecting plate 2 faces sealing frame material 1 surface and goes up the air inlet 5 that gathers, the sound wave that enters is gone out by convergence reflex, intensity of sound is weakened about 50% at this, the sound wave that enters is through more than 2 convergence reflex of remaining reflecting plate and tortuous break-in, substantially, complete attenuation when arriving venthole 6, and the air that enters the room is not stopped.Directly enter in the sealing frame material 1 for fear of sound wave, this programme has taked to be provided with in air inlet 5 the place aheads of sealing frame material 1 technical measures of retaining soundboard 3, just has been subjected to weakening before entering.Sticking flexible material on the retaining soundboard 3 of this device and reflecting plate 3.

Because, the interference direction vector that acts on the compressional wave of noise on the door and window and shear wave is different, and, phase place is in continuous variation, therefore, in special-purpose silencing means of the present invention, allow the compressional wave of noise ripple and shear wave carry out filtering through needle passing hole shape air inlet respectively, through high scattered reflection, wavelength phase shift, the feedback stack of reflecting plate, reach the purpose that abates the noise again.The outdoor air that carries the traffic noise vibration, after being subjected to the filtering, decay, reflection, phase shift, feedback, stack of special construction spare designed in this device, eliminated airborne traffic noise vibration, made airborne traffic noise vibration before access to plant, at first carrying out discrete reflectance, decay.After the filtering of needle passing hole, make greater than the noise wavelength of pinhole diameter and filtered; And less than the noise wavelength of pinhole diameter, behind the access to plant, be subjected to open loop parabola reflecting plate effect wherein, make the vibration wavelength open loop paraphase back reflection of noise, and make the noise ripple of paraphase back reflection and successively the noise ripple of access to plant superpose.Because the noise wave phase that superposes is opposite, wavelength is equal, so, can make by the noise of this device pinhole diameter and be decayed once more, after the reflection of process several times, phase shift, feedback, the stack, the air vibration of carrying the traffic noise vibration in the air weakens gradually, calmness.Under the effect of indoor/outdoor temperature-difference and outside wind pressure, cause air circulation naturally in this isolated plant, need not use the many forced ventilation devices of power consumption.Thereby, both reached and can keep natural ventilation, can reach more than the 30dB every noise again, also can reach at typhoon, sandstorm is mad attack in, filter blocks dust, cut off the purpose of rainwater.

The technical indicator of this product is as follows:

1, under the natural ventilation performance, can reach more than the 30dB every noise.Its natural ventilation rate can be according to user's needs, in 5 cubic meters per minute with adjusted;

2, under the natural ventilation performance, the amount in decibels that each series of products adopt different glass to cut off noise sees the following form:

3, user's short time unlatching window ventilation on demand increases indoor air convection, and 88,99 series can make draught area reach 2/3 of whole window ara.76 series can make draught area reach 1/2 of whole window ara.Ventilation control and regulation scope: more than 50 cubic meters per minute.

4, except under the natural ventilation performance, beyond noise can reach the 30dB function.99 series adopt the heat insulation material material that the aluminum alloy heat conduction of outside in the door and window is blocked, and also have the specific function of heat preservation energy-saving.Construction quality supervision inspection center of country can reach 30dB for the sampling Detection of 99 serial door and windows every noise.

Claims

1, the de-noising mixer of natural ventilation state is characterized in that alternatively up and down is equipped with the reflecting plate of arc in the frame material of sealing, the air inlet that gathers on the frame face in the concave surface center of first reflecting plate, and the reflecting plate convex surface is facing to the venthole on frame material other end surface.

2, by the de-noising mixer of the described natural ventilation state of claim 1, it is characterized in that the retaining soundboard being housed in air inlet the place ahead of frame material appearance.

3,, it is characterized in that on retaining soundboard and reflecting plate, posting flexible material by the de-noising mixer of the described natural ventilation state of claim 2.