CN218120162U

CN218120162U - Air dividing box for eliminating noise

Info

Publication number: CN218120162U
Application number: CN202221987185.6U
Authority: CN
Inventors: 张聪; 尤军; 周洋; 袁丽丽
Original assignee: Blauberg Environmental Systems Suzhou Co ltd
Current assignee: Blauberg Environmental Systems Suzhou Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-23
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a noise abatement's air-distributing box, it includes: possess the epitheca of trade mark seal of a government organization in old china, possess square opening and the inferior valve of being connected with the epitheca, install at the helmholtz resonator plate at the epitheca top, install the diffuser at inferior valve opening part, wherein, the noise of high frequency can be absorbed basically by the hush pipe among the pipe-line system, and the noise of middle-low frequency channel 50HZ-500HZ gets into in the minute bellows, through the diffuser reflection, diffuses to helmholtz resonator plate and carries out noise cancelling treatment. The utility model has the advantages that: the utility model discloses optimized the structure of current air-dividing box amortization, had obvious noise cancelling effect to the noise of well low frequency channel 50HZ-500HZ, and the windage is little, has prolonged the life of air-dividing box through setting up the access hole.

Description

Air dividing box for eliminating noise

Technical Field

The utility model belongs to new trend system field, in particular to noise abatement's air-distributing box.

Background

In a household fresh air system, a metal or ABS (acrylonitrile butadiene styrene) air distribution box has a basic air distribution function in the use process, but has no specific silencing function, the indoor fresh air end of the fresh air system often has the noise of an equipment motor or wind, the high-frequency noise of the motor and the wind noise is well eliminated, the influence of low-medium frequency noise on the user experience is more serious, and at present, no air distribution box has silencing capability for medium-low frequency noise.

At present prior art is that it is cotton to paste amortization egg at the air-distributing box inner wall, inhales the sound through the amortization cotton, and the amortization cotton inhales the dust easily, difficult clearance, and life is short, and the windage is big, influences the output amount of wind of new trend system, lacks the noise cancelling capacity to middle and low frequency sound.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the air distribution box for eliminating noise effectively reduces the noise of 50HZ-500HZ in the middle and low frequency range and prolongs the service life under the condition of ensuring a good air duct.

The technical scheme of the utility model is that: a wind-dividing box for eliminating noise, comprising: the utility model provides a helmholtz resonator plate, install the diffuser at inferior valve opening part that epitheca, possess square opening and be connected with the epitheca.

On the basis of the technical scheme, the method further comprises the following subsidiary technical scheme:

wherein the noise generated by the air-dividing box is reflected to the Helmholtz resonance plate by the diffuser for absorption processing.

Preferably, the upper shell and the lower shell are connected by bolts, and an air inlet and a plurality of air distribution openings are arranged at the connecting seam.

Preferably, the diameter of the air inlet is slightly larger than that of the air distribution opening, and the diameters of the air distribution openings are equal.

Preferably, the diffuser and the lower shell are fixed by a plurality of bolts, a plurality of diamond-shaped bulges which are tightly connected are arranged on the surfaces of the diffuser and the lower shell in the same direction, and the diamond-shaped bulges are consistent in shape and size, so that the noise of 50HZ-500HZ in the middle and low frequency ranges can be effectively reflected.

Preferably, the helmholtz resonator plate is a right-angled trapezoid body, and is installed inside the upper case, and the inclined surface is close to the air inlet.

Preferably, the back of the Helmholtz resonance plate is provided with a V-shaped convex rib, and the V-shaped opening is 90 degrees. The V-shaped convex rib comprises: the protruding muscle of first V type, the protruding muscle of second V type, the width of the protruding muscle of first V type and the protruding muscle of second V type equals with the interval, and the protruding muscle of first V type is good at to the length of the protruding muscle of second V type. A strip-shaped hole is arranged between the first V-shaped convex rib and the second V-shaped convex rib. The strip-shaped hole includes: the width of the first strip hole and the width of the second strip hole are equal to the distance, and the length of the second strip hole is longer than that of the first strip hole.

The utility model has the advantages that: the utility model discloses optimized the structure of current air-distributing box amortization, had obvious noise cancelling effect to middle and low frequency channel 50HZ-500 HZ's noise, and the windage is little, has prolonged air-distributing box's life through setting up the access hole.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded view of the present invention;

FIG. 2 is a top view of a Helmholtz resonator plate according to the present invention;

FIG. 3 is a perspective view of a Helmholtz resonator plate according to the present invention;

FIG. 4 is a top view of a diffuser according to the present invention;

fig. 5 is a top view of the middle-lower case of the present invention.

Detailed Description

The embodiment is as follows: referring to fig. 1-5, an embodiment of a noise-canceling air-dividing box according to the present invention includes: the gas turbine includes an upper case 1, a lower case 2 having a square opening and connected to the upper case 1, a helmholtz resonator plate 3 installed on the top of the upper case 1, and a diffuser 4 installed at an opening of the lower case 2.

The upper shell 1 and the lower shell 2 are both made of metal plates. The upper casing 1 and the lower casing 2 are connected by bolts, and an air inlet 101 and a plurality of air distribution openings 102 are arranged at the joint. The diameter of the air inlet 101 is larger than that of the air distribution opening 102, and the diameters of the air distribution openings 102 are equal.

The diffuser 4 and the lower casing 2 are fixed by a plurality of bolts, and a plurality of diamond-shaped bulges 103 which are tightly connected are arranged on the surfaces of the diffuser 4 and the lower casing 2 which are in the same direction. Since the uneven surface is provided with different groove heights and widths depending on the frequency of the acoustic wave, i.e., 50HZ to 500HZ, the frequency which originally arrives at the same time is divided into an infinite number of small reflected waves to form a wavefront, resulting in time dispersion, because the grooves have different heights. The diffuser 4 can diffuse sound waves at any incident angle, and realize spatial dispersion and time dispersion, thereby effectively reflecting the noise of 50Hz to 500Hz in the middle and low frequency ranges.

The Helmholtz resonance plate 3 is a right-angle trapezoidal body and is arranged inside the upper shell 1, and the inclined surface is close to the air inlet. The back of the Helmholtz resonance plate 3 is provided with a V-shaped convex rib, and a V-shaped opening is 90 degrees. The V-shaped convex rib comprises: first V type protruding muscle 301, the protruding muscle 302 of second V type, the width and the interval of the protruding muscle 301 of first V type and the protruding muscle 302 of second V type equal, and the length of the protruding muscle 302 of second V type is longer than first V type protruding muscle 301. A strip-shaped hole is arranged between the first V-shaped convex rib 301 and the second V-shaped convex rib 302. The bar hole includes: the first bar hole 303 and the second bar hole 304 have the same width and the same interval as each other, and the second bar hole 304 is longer than the first bar hole 304.

The helmholtz resonator plate 3 can effectively absorb the noise reflected by the diffuser 4.

The air distribution box is arranged in the pipeline to distribute fresh air. The pressure at the foremost end of the square air dividing box is the maximum, and the square air dividing box can be directly connected with a far-end air pipe. The wind pressure of both sides is lower relatively, and the relatively nearer tuber pipe of butt joint. When the new trend system began work, there was motor noise to follow the wind and make an uproar and produce, wherein, the noise of high frequency can be absorbed by the hush pipe among the pipe-line system basically, and the noise of middle low frequency channel 50HZ-500HZ gets into the branch bellows, reflects through diffuser 4, diffuses to helmholtz resonator plate 3 and carries out amortization.

The utility model has the advantages that: the utility model discloses optimized the structure of current air-dividing box amortization, had obvious noise cancelling effect to the noise of well low frequency channel 50HZ-500HZ, and the windage is little, has prolonged the life of air-dividing box through setting up the access hole.

The above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All equivalent changes or modifications made according to the spirit of the main technical scheme of the invention should be covered in the protection scope of the invention.

Claims

1. A wind-dividing box for eliminating noise is characterized by comprising: the utility model discloses a helmholtz resonator board, including epitheca (1), possess square opening and inferior valve (2) be connected with epitheca (1), install helmholtz resonator board (3) at epitheca (1) top, install diffuser (4) at inferior valve (2) opening part and noise of reflection to helmholtz resonator board (3).

2. The noise-canceling air-dividing box according to claim 1, wherein: the upper shell (1) is connected with the lower shell (2) through bolts, and an air inlet (101) and a plurality of air distribution openings (102) are formed in the connecting seam.

3. The noise-canceling air-dividing box according to claim 2, wherein: the diameter of the air inlet (101) is larger than that of the air distribution opening (102), and the diameters of the air distribution openings (102) are equal.

4. The noise abatement air box of claim 1, wherein: the diffuser (4) and the lower shell (2) are fixed by a plurality of bolts.

5. The noise-canceling air-dividing box according to claim 4, wherein: the diffusion body (4) and the lower shell (2) are provided with a plurality of diamond-shaped bulges (103) which are tightly connected in the same direction, and the diamond-shaped bulges (103) are consistent in shape and size.

6. The noise-canceling air-dividing box according to claim 1, wherein: helmholtz resonance board (3) is for the square board that possesses the inclined plane, installs inside epitheca (1), and the inclined plane is close to air intake (101).

7. The noise abatement plenum of claim 6, wherein: helmholtz sounding board (3) back is equipped with the protruding muscle of V type, and V type opening is 90 degrees, the protruding muscle of V type includes: first V type protruding muscle (301), second V type protruding muscle (302), the width and the interval of first V type protruding muscle (301) and second V type protruding muscle (302) equal, the length of second V type protruding muscle (302) is longer than first V type protruding muscle (301).

8. The noise abatement plenum of claim 7, wherein: a strip-shaped hole is formed between the first V-shaped convex rib (301) and the second V-shaped convex rib (302).

9. The noise abatement air box of claim 8, wherein: the strip-shaped hole includes: the width of the first strip-shaped hole (303) and the width of the second strip-shaped hole (304) are equal to the distance, and the length of the second strip-shaped hole (304) is longer than that of the first strip-shaped hole (303).