CN209875570U - Noise reduction device and gas water heater - Google Patents

Abstract

The utility model discloses a device and gas heater of making an uproar falls, it includes the one end open-ended tubbiness body of enclosing to fall the device of making an uproar by perisporium and diapire connection, the perisporium includes internal perisporium and periphery wall, the middle part of internal perisporium encloses into inlet air duct, the clearance has between internal perisporium and the periphery wall, the cavity is cut off by first baffle and is formed a plurality of amortization chamber, the amortization intracavity is provided with at least one second baffle, the amortization chamber is cut off by the second baffle and is formed the sub-amortization chamber of a plurality of layers, mutual independence between the sub-amortization chamber, the second baffle sets up with first baffle is mutually. The utility model discloses a device of making an uproar falls carries out the effective absorption with the noise that gets into this structure to effectively prevent that sound from spilling from this, can realize falling the noise absorption to different frequencies through the inner structure design and fall, can effectively the noise reduction spread out in the box. In addition, the noise reduction structure basically has no influence on the air volume and the air pressure, and the air intake can not be influenced.

Description

Noise reduction device and gas water heater

Technical Field

The utility model belongs to the technical field of noise elimination and noise reduction, specifically speaking relates to a device of making an uproar and adopt this gas heater of making an uproar falls.

Background

The gas water heater has the advantages of convenient use and high heat efficiency, and is popular with people. However, since the gas water heater uses a blower and an intensive combustion technology, noise is inevitably generated when it is used. According to the requirement of GB6932-2015, the noise of the whole machine is below 65dB (including 65 dB) and is qualified, and the lower the noise is, the more competitive the product is in the market under the condition of meeting other indexes. The noise of the gas water heater mainly comes from combustion noise, fan noise, airflow noise, water flow noise and the like, wherein the fan noise accounts for more than 80% of the noise contribution of the whole gas water heater and is a main noise source, so that the reduction of the fan noise is an important direction for improving the gas water heater. To the control of gas heater centrifugal fan noise, current solution mostly concentrates on or uses big fan, realizes making an uproar through reducing the rotational speed, or uses little fan, reduces pneumatic noise and realizes, but is subject to space and wind pressure requirement, and the noise reduction effect is very limited.

Disclosure of Invention

The utility model discloses a solve the poor technical problem of current gas heater noise reduction effect, provided a noise reduction device, can solve above-mentioned problem.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

a noise reduction device comprises a barrel-shaped body which is connected and enclosed by a peripheral wall and a bottom wall and has an opening at one end, wherein the peripheral wall comprises an inner peripheral wall and an outer peripheral wall, the middle part of the inner peripheral wall is enclosed into an air inlet channel, a gap is arranged between the inner peripheral wall and the outer peripheral wall, one end of the inner peripheral wall and one end of the outer peripheral wall are hermetically connected with the bottom wall, the other end is connected through a connecting panel, a closed cavity is enclosed among the bottom wall, the inner peripheral wall, the outer peripheral wall and the connecting panel, the cavity is partitioned by the first partition boards to form a plurality of silencing cavities, at least one second partition board is arranged in each silencing cavity, the silencing cavities are partitioned by the second partition boards to form a plurality of layers of sub-silencing cavities which are mutually independent, the second partition board is perpendicular to the first partition board, the sub-silencing cavity is provided with at least one sound inlet, and the sound inlet is formed in the inner peripheral wall.

Further, the first partition is perpendicular to the bottom wall, and the second partition is parallel to the bottom wall.

Further, be provided with a plurality of reflecting plate in the sub-amortization intracavity, the reflecting plate is the arc, with interior perisporium or periphery wall set up with one heart.

Furthermore, at least one third partition board is further arranged in the sub-silencing cavity, the third partition board is fixed with the inner peripheral wall or the outer peripheral wall, the third partition board and the reflecting board and/or the first partition board enclose a reflecting cavity, the two adjacent reflecting cavities are communicated or not communicated in front, and the reflecting cavity is communicated with the air inlet channel through a sound inlet.

Further, the reflection plate is fixed to the first partition plate and/or the third partition plate.

Furthermore, a sound absorbing layer is arranged on one side surface of the inner peripheral wall facing the air inlet channel.

Further, the distance between the outer peripheral wall and the inner peripheral wall meets the integral multiple of lambda/4, or the distance between the outer peripheral wall and the reflecting plate meets the integral multiple of lambda/4, or the distance between different reflecting plates in the same sub-silencing cavity meets the integral multiple of lambda/4, wherein lambda is the wavelength of the noise to be eliminated, and the noise in different wavelength ranges is eliminated by different sub-silencing cavities.

Further, λ = c/f, f is the frequency of the noise to be eliminated, f is a value range of 200Hz-2000Hz, and c is the sound velocity.

Furthermore, the lengths of the reflecting plates in the same sub-silencing cavity are the same or different, the lengths of the reflecting plates in different sub-silencing cavities are the same or different, and the lengths of the third partition plates in the same sub-silencing cavity are the same or different.

The utility model simultaneously provides a gas water heater, including the casing with set up in fan in the casing, set up the air intake relative with the fan entry on the casing, be provided with any preceding one in the casing the device of making an uproar falls, it fixes to fall the device of making an uproar on the inner wall of casing.

Compared with the prior art, the utility model discloses an advantage is with positive effect: the utility model discloses a device of making an uproar falls, the one end open-ended tubbiness body that encloses is connected by perisporium and diapire, forms a plurality of amortization chamber along the perisporium direction, the sound inlet in amortization chamber is seted up on the internal perisporium. The sound through this structure can obtain the effective absorption to effectively prevent sound from spilling from this, can realize through the inner structure design that the sound absorption that aims at different frequencies falls and make an uproar, can effectively reduce the noise and spread out in the box. In addition, the noise reduction structure basically has no influence on the air volume and the air pressure, and the air intake can not be influenced.

Other features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the invention, which is to be read in connection with the accompanying drawings.

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 following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a noise reduction device provided by the present invention;

FIG. 2 is a cross-sectional view of one of the sound-attenuating chambers of FIG. 1;

FIG. 3 is a schematic view of the channel of FIG. 2;

fig. 4 is a schematic structural diagram of an embodiment of the gas water heater provided by the present invention;

FIG. 5 is a schematic view of a portion of the structure of FIG. 4;

fig. 6 is a schematic structural view of another embodiment of the gas water heater according to the present invention;

fig. 7 is a schematic structural diagram of another embodiment of the gas water heater according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In a first embodiment, the present invention provides a noise reduction device, as shown in fig. 1 and fig. 2, which includes a barrel-shaped body with an open end, which is formed by connecting a peripheral wall 11 and a bottom wall 12, the peripheral wall 11 includes an inner peripheral wall 111 and an outer peripheral wall 112, an air inlet channel 113 is formed by the middle portion of the inner peripheral wall 111, a gap is formed between the inner peripheral wall 111 and the outer peripheral wall 112, one ends of the inner peripheral wall 111 and the outer peripheral wall 112 are hermetically connected to the bottom wall 12, the other ends are connected by a connection panel 13, a closed cavity is formed by the bottom wall 12, the inner peripheral wall 111, the outer peripheral wall 112 and the connection panel 13, the cavity is partitioned by a first partition 14 to form a plurality of sound attenuation cavities 15, at least one second partition 16 is disposed in the sound attenuation cavities 15, the sound attenuation cavities 15 are partitioned by the second partition 16 to form a plurality of sub sound attenuation cavities 151, the sub sound attenuation cavities 151 are independent from each other, the second partition, the sound inlet 152 is opened in the inner peripheral wall 111. The peripheral wall 11 can be designed into closed structures with different sizes according to specific installation environments, and the sound attenuation cavities 15 are distributed along the circumferential direction of the peripheral wall 11.

The noise reduction device of this embodiment is a barrel-shaped body with one open end, which is formed by connecting the peripheral wall 11 and the bottom wall 12, and a plurality of muffling chambers are formed along the direction of the peripheral wall 11, and the sound inlets of the muffling chambers are opened on the inner peripheral wall 111. The middle part of internal perisporium 111 encloses into inlet air channel 113, and the noise firstly gets into inlet air channel 113 from a port of tubbiness body, blocks through diapire 12, then gets into each amortization chamber 15 through sound inlet 152 in, and the noise is in amortization chamber 15 on the one hand through multiple reflection, and the energy is consumed, and from the user's sense of hearing angle, the noise is absorbed after getting into amortization chamber 15 to effectively prevent sound from spilling from this. Through the internal structure design, the sound absorption and noise reduction aiming at different frequencies can be realized, and the noise can be effectively reduced and is transmitted out from the box body. In addition, the noise reduction structure basically has no influence on the air volume and the air pressure, and the air intake can not be influenced. Through further cutting off amortization chamber 15 through second baffle 16 and forming a plurality of layers of sub-amortization chamber 151, second baffle 16 can adopt a plurality ofly, two second baffles 16 have been set up in this embodiment, divide the amortization chamber into three-layer, can increase the quantity that is used for the amortization cavity, through the difference that sets up the passageway length in different sub-amortization chambers, utilize quarter wavelength method principle, make each passageway length satisfy the quarter wavelength of different wavelength noises, or the integral multiple of quarter wavelength, can absorb and eliminate the noise of different wavelength also different frequency channels, through laboratory test, the frequency of fan noise mainly concentrates on the well high frequency channel of 200Hz-2000Hz, through the reasonable design passageway length, the noise of above-mentioned frequency channel of elimination that can the maximize. The channel length can be seen at S1, S2 shown in fig. 3.

The sub-muffling cavity 151 is a blind cavity with a sound inlet, and the principle thereof is an FP resonant cavity, and the principle of reactive muffling is adopted, that is, sound waves interfere after entering the sub-muffling cavity 151, so that most of the forced vibration of the sound waves in the sub-muffling cavity is weakened. The shape of the opening of the sound inlet is not limited, so that the sound inlet 152 can be conveniently opened, and the sound inlet can be a strip-shaped hole, certainly not limited to the strip-shaped hole, but also can be a round hole.

Preferably, in this embodiment, the first partition 14 is perpendicular to the bottom wall 12, and the second partition 16 is parallel to the bottom wall 12. The number of the second partition boards 16 is limited by the height of the peripheral wall 11, the height of the peripheral wall 11 may be different from 20cm to 50cm, and the higher the height is, the more the number of the second partition boards 16 can be theoretically provided, the more the number of the sound-deadening chambers can be partitioned, and the longer the channel length is, the wider the frequency range of the noise absorption can be, and the better the sound absorption effect is. The internal structure of each layer interrupted by the second baffle 16 is different for eliminating noise of different acoustic frequencies. The internal structure can form channels with different lengths to play a role in silencing different frequencies, the design of the channel length depends on the range of the silencing frequency band, and the lower the frequency, the longer the channel length is needed.

A plurality of reflecting plates 17 are arranged in the sub-silencing cavity 151, and the reflecting plates 17 are arc-shaped plates and are arranged concentrically with the inner peripheral wall 111 or the outer peripheral wall 112. The noise entering the sub sound deadening chamber 151 is reflected in the sub sound deadening chamber 151 a plurality of times, and energy is consumed, and by providing the reflecting plate 7, the consumption speed of energy can be increased.

The reflecting plates 17 are preferably arranged in a plurality of numbers, the distance between the reflecting plates and the inner peripheral wall 111, the distance between the reflecting plates and the outer peripheral wall 111 and the distance between different reflecting plates can be scientifically designed, and then the length of a channel through which noise enters the sub-silencing cavity can be adjusted, so that the technical effect of eliminating noise with different frequencies is achieved.

As shown in fig. 2, at least one third partition 18 is further disposed in the sub sound-deadening chamber 151, the third partition 18 is fixed to the inner circumferential wall 111 or the outer circumferential wall 112, the third partition 18 may surround a reflection chamber with the reflection plate 17 according to the different disposition positions of the third partition 18 and the different fitting relationship with other components, the third partition 18 may further surround a reflection chamber with the first partition 14, or the third partition 18 may further surround a reflection chamber with the reflection plate 17 adjacent to the third partition 18, the reflection chamber is located in the sub sound-deadening chamber 151, and one sub sound-deadening chamber may include a plurality of reflection chambers, each reflection chamber must correspond to a sound inlet, energy of noise entering the reflection chamber from the sound inlet is absorbed and consumed, according to the shape or position of the reflection chamber, the same sound inlet may be shared by the plurality of reflection chambers, noise entering through the sound inlet is reflected by the third partition 18 or the reflection plate 17, the reflected light enters different reflecting cavities, and continues to propagate until the energy is completely consumed, the number, the arrangement positions and the like of the third partition plates 18 in different sub-silencing cavities 151 are different, the number, the positions and the shapes of the enclosed reflecting cavities are different, the adjacent two reflecting cavities are communicated or not communicated, and the reflecting cavities are communicated with the air inlet channel through the sound inlet. In this embodiment, through separating a plurality of reflection cavities in the sub-muffling cavity again respectively, the channel lengths of different reflection cavities can be set as required, the noise of the elimination target frequency range that it can maximize is reduced, and the noise reduction effect is greatly improved.

As shown in fig. 2, the reflective cavity may be in the shape of a regular fan ring or an irregular 7-shaped structure.

As a preferred embodiment, one end of the reflection plate 17 may be fixed to the first partition 14 or may be fixed to the third partition 18. The other end of the reflection plate 17 may be a free end to form a gap communicating the two reflection cavities, or both ends of the reflection plate may be fixed to the first partition plate 14 and the third partition plate 18, respectively.

On the side of the inner circumferential wall 111 facing the air inlet channel 113, a sound absorbing layer (not shown) is provided for eliminating secondary noise that may be generated when wind passes through the channel. The frequency range of the sound absorption layer capable of absorbing noise is 500 Hz-1000 Hz, the sound absorption coefficient is more than 0.6, and the noise is reduced aiming at the main frequency section of the fan product, namely 500 Hz-1000 Hz; the sound absorption material can be traditional sound absorption materials such as glass fiber and non-woven fabrics, and can also be novel sound absorption materials such as foam metal.

The silencing principle in this embodiment uses a quarter-wave method, and the distance between the outer peripheral wall 112 and the inner peripheral wall 111 satisfies an integer multiple of λ/4, or the distance between the outer peripheral wall 112 and the reflection plate 17 satisfies an integer multiple of λ/4, or the distance between different reflection plates located in the same sub-silencing cavity satisfies an integer multiple of λ/4, where λ is the wavelength of the noise to be eliminated, and the different sub-silencing cavities eliminate the noise in different wavelength ranges. The noise wavelength that the passageway will be eliminated in the different sub-amortization chambeies can be different, and the noise wavelength that will eliminate carries out reasonable selection from its value range, then calculates corresponding channel length, satisfies in limited space, and as far as possible promotes inhales the acoustic frequency bandwidth, frequency and to the relation of length as follows:

λ = c/f, f is the frequency of the noise to be eliminated, f ranges from 200Hz to 2000Hz, and c is the sound velocity, so that the wavelength range of the noise to be eliminated of λ can be calculated.

The length of the reflecting plate 17 in the same sub-muffling cavity 151 is the same or different, and the reflecting path to be set can be calculated according to the frequency range, so that the phase of the reflecting plate is converted by 180 degrees after the reflecting plate reflects the noise in the frequency range, and the reflecting plate offsets the incident noise, thereby achieving the muffling effect.

The length of the channel is selected to be integral multiple of one fourth of the wavelength of the sound wave of the noise to be eliminated, the transmission distance of the sound source can be regarded as integral multiple of one fourth of the wavelength of the sound wave, the sound wave with the wavelength is just reflected by the reflecting plate and has 180 degrees of phase difference with the sound wave with the frequency continuously emitted by the sound aid, and therefore the two paths of sound waves are cancelled out, and the effect of eliminating the noise is achieved.

In the second embodiment, as shown in fig. 4-7, the present embodiment provides a gas water heater, which includes a housing 21 and a blower 22 disposed in the housing 21, the housing 21 is provided with an air inlet 23 opposite to an inlet of the blower 22, a top of the housing 21 is provided with a smoke tube hole 25 through which a smoke containing tube 24 passes, a noise reduction device 1 is disposed in the housing 21, as shown in fig. 1, the gas water heater includes a barrel-shaped body with an open end, which is formed by connecting a peripheral wall 11 and a bottom wall 12, the peripheral wall 11 includes an inner peripheral wall 111 and an outer peripheral wall 112, a middle portion of the inner peripheral wall 111 encloses an air inlet channel 113, a gap is provided between the inner peripheral wall 111 and the outer peripheral wall 112, one ends of the inner peripheral wall 111 and the outer peripheral wall 112 are hermetically connected to the bottom wall 12, the other ends are connected to the connecting panel 13, a closed cavity is defined between the bottom wall 12, the inner peripheral, at least one second partition plate 16 is arranged in the silencing cavity 15, the silencing cavity 15 is partitioned by the second partition plate 16 to form a plurality of layers of sub-silencing cavities 151, the sub-silencing cavities 151 are mutually independent, the second partition plate 16 is perpendicular to the first partition plate 14, the sub-silencing cavities 151 are provided with at least one sound inlet 152, and the sound inlet 152 is arranged on the inner peripheral wall 111. The peripheral wall 11 can be designed into closed structures with different sizes according to specific installation environments, and the sound attenuation cavities 15 are distributed along the circumferential direction of the peripheral wall 11.

Since holes such as the air inlet 23 and the smoke pipe hole 24 formed in the casing 21 for achieving a certain function may be main portions for transmitting noise to the outside of the casing 21, it is preferable to provide the noise reduction device 1 at the air inlet 23 or the smoke pipe hole 24.

Other structures of the noise reduction device 1 can be found in the description of the first embodiment, and are not described herein.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.

Claims (10)

1. A noise reducing device, characterized by: the barrel-shaped body is characterized by comprising a barrel-shaped body, wherein the barrel-shaped body is formed by connecting a peripheral wall and a bottom wall to form an opening at one end, the peripheral wall comprises an inner peripheral wall and an outer peripheral wall, the middle of the inner peripheral wall is surrounded to form an air inlet channel, a gap is formed between the inner peripheral wall and the outer peripheral wall, one end of the inner peripheral wall and one end of the outer peripheral wall are connected with the bottom wall in a sealing mode, the other end of the inner peripheral wall is connected with the bottom wall through a connecting panel, a closed cavity is surrounded by the bottom wall, the inner peripheral wall, the outer peripheral wall and the connecting panel, the cavity is separated by a first partition plate to form a plurality of silencing cavities, at least one second partition plate is arranged in the silencing cavities, the silencing cavities are separated by the second partition plate to form a plurality of layers of sub silencing cavities, the sub silencing cavities are mutually independent.

2. The noise reduction device according to claim 1, characterized in that: the first partition is perpendicular to the bottom wall, and the second partition is parallel to the bottom wall.

3. The noise reduction device according to claim 1, characterized in that: the sub-silencing cavity is internally provided with a plurality of reflecting plates which are arc-shaped plates and are concentrically arranged with the inner peripheral wall or the outer peripheral wall.

4. The noise reduction device according to claim 3, characterized in that: at least one third partition board is further arranged in the sub-silencing cavity, the third partition board is fixed with the inner peripheral wall or the outer peripheral wall, the third partition board and the reflecting board and/or the first partition board form a reflecting cavity in a surrounding mode, the two adjacent reflecting cavities are communicated or not communicated in front, and the reflecting cavity is communicated with the air inlet channel through a sound inlet.

5. The noise reduction device according to claim 4, wherein: the reflecting plate is fixed with the first partition plate and/or the third partition plate.

6. The noise reduction device according to any one of claims 1 to 5, wherein: and a sound absorption layer is arranged on one side surface of the inner peripheral wall facing the air inlet channel.

7. The noise reduction device according to claim 3, characterized in that: the distance between the outer peripheral wall and the inner peripheral wall meets the integral multiple of lambda/4, or the distance between the outer peripheral wall and the reflecting plate meets the integral multiple of lambda/4, or the distance between different reflecting plates in the same sub-silencing cavity meets the integral multiple of lambda/4, wherein lambda is the wavelength of noise to be eliminated, and the noise in different wavelength ranges is eliminated by different sub-silencing cavities.

8. The noise reduction device according to claim 7, wherein: λ = c/f, f is the frequency of the noise to be eliminated, f ranges from 200Hz to 2000Hz, and c is the sound velocity.

9. The noise reduction device according to claim 7, wherein: the length of the reflecting plate in the same sub-silencing cavity is the same or different, the length of the reflecting plate in different sub-silencing cavities is the same or different, and the length of the third partition plate in the same sub-silencing cavity is the same or different.

10. The utility model provides a gas water heater, include the casing with set up in fan in the casing, set up the air intake relative with the fan entry on the casing, its characterized in that: the noise reducer of any of claims 1-9 disposed within the housing, the noise reducer being secured to an inner wall of the housing.