CN110857774B

CN110857774B - Noise-reducing fire grate

Info

Publication number: CN110857774B
Application number: CN201810973657.4A
Authority: CN
Inventors: 范天星; 韩宏刚; 肖晓艳; 周品
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2021-08-20
Anticipated expiration: 2038-08-24
Also published as: CN110857774A

Abstract

The invention relates to a noise reduction fire grate which comprises a fire grate main body, wherein a main fire hole is formed in the top of the fire grate main body, auxiliary fire holes are formed in the side walls of the two sides of the fire grate main body, noise reduction pieces are respectively arranged on the two sides of the fire grate main body corresponding to the auxiliary fire holes, at least two cavities with different volumes are formed in the noise reduction pieces, and small holes opposite to the auxiliary fire holes are formed in the side walls of the cavities. The noise reduction piece in the noise reduction fire grate is provided with cavities with different volumes, and the cavities with different volumes have different corresponding frequencies and resonance characteristics to sound waves, so that multiple resonance frequencies can be generated, and the resonance frequency range of the noise reduction piece is enlarged. The noise reduction fire grate adopting the noise reduction piece can reduce noise of different frequencies generated under different firepower conditions, and effective noise reduction of noise in a large-span frequency range is realized.

Description

Noise-reducing fire grate

Technical Field

The invention relates to the technical field of noise reduction and silencing, in particular to a noise reduction fire grate.

Background

The domestic gas water heater is a common hot water supply device in daily life, has the advantages of quick hot water discharge, constant water temperature, less scale formation, small occupied area, no water quantity control and the like, and is deeply favored by consumers. However, during the combustion process of the gas water heater, due to the mutual collision between flames inside the combustion chamber, a large noise is generated during the operation.

The invention discloses a fire grate structure with a noise reduction and emission reduction function, which is a Chinese patent invention with an authorization publication number of CN10537156B (application number of 201610209643.6). in the fire grate structure, an emission reduction and noise reduction device is embedded below the top wall of a combustion inner core, and the emission reduction and noise reduction device is a flow stabilizing sheet which is arranged below the top wall and is attached to the top wall. The flow stabilizing sheet comprises a plurality of convex parts and a plurality of concave parts, and the convex parts and the concave parts are sequentially and adjacently distributed. The noise reduction and emission reduction fire grate can effectively reduce the noise of the fire grate and further improve the gas combustion efficiency. However, the emission reduction and noise reduction device in the noise reduction and emission reduction fire grate is mainly used for eliminating noise generated when fuel gas is sprayed onto the combustion inner core, and is more mainly used for reducing the air flow speed and improving the mixing sufficiency of the fuel gas and oxygen. The device for reducing emission and lowering noise cannot solve the problem of noise generated by mutual collision of flames. In addition, because the gear or temperature adjustment can be realized during combustion of the gas water heater, the frequency range of noise generated during combustion is relatively wide, and a single emission reduction and noise reduction device can only realize noise reduction treatment on noise in a small frequency range generally and cannot realize the noise reduction effect of noise in a large frequency range.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a noise reduction fire grate capable of realizing noise reduction processing in a large-span frequency range aiming at the prior art.

The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a fire of making an uproar row of making an uproar, arranges the main part including the fire, the top that the main part was arranged to the fire is provided with main fire hole, be provided with vice fire hole, its characterized in that on the lateral wall of main part both sides are arranged to the fire: the fire grate is characterized in that noise reduction pieces are arranged on two sides of the fire grate main body corresponding to the auxiliary fire holes respectively, at least two cavities with different volumes are arranged in the noise reduction pieces, and small holes opposite to the auxiliary fire holes are formed in the side walls of the cavities.

In order to improve the noise reduction effect, each cavity in the noise reduction piece extends along the distribution direction of the auxiliary fire holes, cavities corresponding to the auxiliary fire holes are arranged in each cavity in a dividing mode, and the side wall of each cavity is provided with the small hole.

Optionally, the aperture is circular or rectangular.

In order to further improve the noise reduction effect, the shapes of the small holes on the two adjacent cavities are different.

In order to achieve different resonance frequencies and further conveniently realize noise reduction treatment on noise in different frequency ranges, the areas of the small holes in different cavities are different.

In order to enable the noise with different frequencies to effectively enter each chamber to realize noise reduction processing of the noise in a large frequency range, each cavity in the noise reduction piece extends along the distribution direction of the auxiliary fire holes and is arranged from top to bottom.

Simple structure ground, the box body of making an uproar piece for having the cavity falls, be provided with the division board in the box body and with the cavity is kept apart into two at least cavities.

Preferably, the section of the inner side wall of the noise reduction piece is a curve, the section of the outer side wall of the noise reduction piece is a straight line, and the cross-sectional areas of the cavities are different.

The utility model has the advantages of simple to operate, the both ends of falling the piece of making an uproar are passed through the connection piece and are connected on the fire grate main part.

In order to reduce the striking probability of the downthehole flame of main fire, reduce the noise that produces in the flame burning from the root, the protruding setting in middle part of main part roof is arranged to the fire, the roof of main part is arranged to the fire is including being first plate body and the second plate body that the contained angle set up, be provided with main fire hole on first plate body, the second plate body respectively.

In order to further reduce flame combustion noise, the main fire holes comprise circular main fire holes and rectangular main fire holes, and the circular main fire holes and the rectangular main fire holes are alternately arranged.

Preferably, the included angle between the first plate body and the second plate body is 140-160 degrees.

Compared with the prior art, the invention has the advantages that: the noise reduction piece in the noise reduction fire grate is provided with cavities with different volumes, and the cavities with different volumes have different corresponding frequencies and resonance characteristics to sound waves, so that multiple resonance frequencies can be generated, and the resonance frequency range of the noise reduction piece is enlarged. The noise reduction fire grate adopting the noise reduction piece can reduce noise of different frequencies generated under different firepower conditions, and effective noise reduction of noise in a large-span frequency range is realized.

Drawings

Fig. 1 is a perspective view of a noise reduction fire grate in an embodiment of the invention.

FIG. 2 is a cross-sectional view of a noise reducing fire grate in an embodiment of the present invention.

Fig. 3 is a partially enlarged view of fig. 2.

Fig. 4 is a perspective view of a noise reducing member in an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 4, the noise reduction fire grate in the present embodiment includes a fire grate body 1, and a combustion core is disposed at an upper portion of the fire grate body 1. In this embodiment, the combustion inner core top plate is arranged along the central line in a protruding manner, so that the interface of the top plate is in a shape of Λ, that is, the combustion inner core top plate in this embodiment includes the first plate body 101 and the second plate body 102 which are integrally connected, and the first plate body 101 and the second plate body 102 are arranged at an included angle. The included angle between the first plate 101 and the second plate 102 is preferably 140 ° to 160 °, and in this embodiment, the included angle between the first plate 101 and the second plate 102 is 150 °. All be provided with a plurality of main fire holes 11 along length direction on first plate body 101 and the second plate body 102, so when flame spouts out from main fire hole 11 on first plate body 101 and the second plate body 102, flame is dispersion trend blowout on first plate body 101 and the second plate body 102, has effectively reduced the noise that collides each other and arouses between the flame. In addition, the main fire holes 11 include circular main fire holes 11 and rectangular main fire holes 11, and the circular main fire holes 11 and the rectangular main fire holes 11 are alternately arranged along the length direction of the first plate body 101 and the second plate body 102.

A plurality of auxiliary fire holes 12 are uniformly distributed on the side walls of the two sides of the combustion inner core along the length direction.

Simultaneously, two sides of the combustion inner core are respectively provided with a noise reduction part 2, the noise reduction part 2 is integrally a strip-shaped box body, and a cavity is formed inside the noise reduction part 2. In this embodiment, the extending direction of the noise reduction member 2 is parallel to the length direction of the fire grate main body 1, and the length of the noise reduction member 2 is matched with the length of the fire grate main body 1. Should fall the both ends of making an uproar 2 and be connected with connection piece 3 respectively, fall the piece 2 of making an uproar and then connect on the tip of fire row main part 1 through connection piece 3, connection piece 3 is arranged on main part 1 through spot welding technique welding fire. Two fall 2 completion welding backs of making an uproar, two connection pieces 3 that fall on 2 of making an uproar are the plane to the merge mutually, and the top of falling 2 of making an uproar flushes with the outward flange of burning inner core roof mutually, and then has guaranteed to fall the aesthetic property that the fire was arranged overall structure of making an uproar. In addition, the noise reduction piece 2 is welded on the fire grate main body 1, the lower part of the inner wall of the noise reduction piece 2 is attached to the side wall of the fire grate main body 1, and a certain gap is formed between the upper part of the inner side wall of the noise reduction piece 2 and the side wall of the fire grate main body 1.

At least two cavities extending along the length direction of the fire grate main body 1 are arranged in the noise reduction piece 2 from top to bottom. The noise reduction element 2 in this embodiment comprises three cavities. The volume of each cavity is different, and in this embodiment, the length of each cavity is the same, that is, the cross-sectional area of each cavity is different.

In this embodiment, the cross section of the inner sidewall of the noise reduction member 2 is a curve, and in this embodiment, the inner sidewall of the noise reduction member 2 comprises, from top to bottom, a first inner wall plate 201, a second inner wall plate 202, a third inner wall plate 203, the first inner wall plate 201, the second inner wall plate 202, and the third inner wall plate 203 which are integrally connected in sequence, and are sequentially close to the sidewall of the fire grate main body 1. The lateral wall that makes an uproar 2 falls then is on a parallel with the lateral wall setting of fire grate main part 1, and it then is connected through the last wallboard to make an uproar 2 between the upper end of inside wall and lateral wall, then is connected through the lower wallboard between the lower extreme of inside wall and lateral wall, the crooked setting of lower wallboard in this embodiment. A partition plate 20 is horizontally arranged in the cavity of the noise reduction member 2 along the boundary line between the first inner wall plate 201 and the second inner wall plate 202 and the boundary line between the second inner wall plate 202 and the third inner wall plate 203, and the partition plate 20 is connected to the outer side wall of the noise reduction member 2. The cavity in the noise reducer 2 is thus divided into three separate cavities by the partition plate 20. As shown in fig. 3, the cross section of the uppermost cavity is rectangular, the cross section of the middle cavity is pentagonal, the cross section of the lowermost cavity is fan-shaped, and the cross sections of the cavities have different areas, so that the volumes of the cavities are different.

Corresponding to each auxiliary fire hole 12, a plurality of partition plates 23 are arranged in each cavity along the direction of the cross section, so that the cavity is divided into chambers 22 corresponding to the auxiliary fire holes 12, and each chamber 22 is provided with a small hole 21. In this embodiment, the sidewall of the uppermost cavity is provided with a circular small hole 21. Two rows of small holes 21 are formed in the side wall of the cavity in the middle, one row is a rectangular small hole 21 at the upper part, and the other row is a circular small hole 21 at the lower part. The side wall of the cavity at the lowest part is provided with a small rectangular hole 21. The diameter of the round small hole 21 is 0.5-1 mm, the length of the rectangular small hole 21 is 1-1.5 mm, and the width of the rectangular small hole 21 is 0.2-0.5 mm.

When the fire grate main body 1 works, the noise generated can enter the noise reduction pieces 2 on two sides of the fire grate main body 1, each cavity 22, namely small holes 21 on the cavity 22, form Helmholtz resonators, and the noise is different in each cavity 22, so that the energy of the cavity is continuously lost, and the noise reduction effect is achieved. And fire row main part 1 can carry out the regulation of firepower size when using, and the frequency of the burning noise that the flame of different firepowers produced is also different, and the volume of different cavitys is different, and then makes the volume of each cavity 22 also different, and then has improved the frequency range of eliminating the noise for the resonant frequency of a plurality of cavities 22 can satisfy the dominant frequency range of fire row main part 1 radiography, and then realizes span frequency range noise reduction.

Claims

1. The utility model provides a fire of making an uproar row of making an uproar falls, arranges main part (1) including the fire, the top of fire row main part (1) is provided with main fire hole (11), be provided with vice fire hole (12), its characterized in that on the lateral wall of fire row main part (1) both sides: the fire grate is characterized in that noise reduction pieces (2) are arranged on two sides of the fire grate main body (1) corresponding to the auxiliary fire holes (12) respectively, at least two cavities with different volumes are arranged in the noise reduction pieces (2), and small holes (21) opposite to the auxiliary fire holes (12) are formed in the side walls of the cavities.

2. The noise reducing fire grate of claim 1, wherein: each cavity in the noise reduction piece (2) extends along the distribution direction of the auxiliary fire holes (12), cavities (22) corresponding to the auxiliary fire holes (12) are arranged in each cavity in a split mode, and the side wall of each cavity (22) is provided with the small holes (21).

3. The noise reducing fire grate of claim 2, wherein: the small holes (21) are round or rectangular.

4. A noise reducing fire grate as claimed in claim 1 or 2, wherein: the small holes (21) on two adjacent cavities are different in shape.

5. A noise reducing fire grate as claimed in any one of claims 1 to 3, wherein: the small holes (21) on different cavities have different areas.

6. The noise reducing fire grate of claim 1, wherein: and each cavity in the noise reduction piece (2) extends along the distribution direction of the auxiliary fire holes (12), and the cavities are arranged from top to bottom.

7. The noise reducing fire grate of claim 6, wherein: the noise reduction piece (2) is a box body with a cavity, and a separation plate (20) is arranged in the box body to separate the cavity into at least two cavities.

8. The noise reducing fire grate of claim 7, wherein: the section of the inner side wall of the noise reduction piece (2) is a curve, the section of the outer side wall of the noise reduction piece (2) is a straight line, and the cross section areas of the cavities are different.

9. The noise reducing fire grate of claim 1, wherein: the two ends of the noise reduction piece (2) are connected to the fire grate main body (1) through connecting pieces (3).

10. The noise reducing fire grate of claim 1, wherein: the middle part of main part (1) roof is arranged to the fire is protruding to be set up, the roof of main part (1) is arranged to the fire is including being first plate body (101) and second plate body (102) that the contained angle set up, be provided with main fire hole (11) on first plate body (101), second plate body (102) respectively.

11. The noise reducing fire grate of claim 10, wherein: the main fire holes (11) comprise circular main fire holes (11) and rectangular main fire holes (11), and the circular main fire holes (11) and the rectangular main fire holes (11) are arranged alternately.

12. The noise reducing fire grate of claim 10, wherein: the included angle between the first plate body (101) and the second plate body (102) is 140-160 degrees.